<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2020-02-12T18:40:57.5841525+00:00 -->
<!-- Version            : 5.0.1.321 -->
<!-- Package ID         : 9a1f7a23fb66429497b4da4233fd21e6 -->
<!-- Copyright (c) 2020 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:sic="http://xbrl.sec.gov/sic/2011-01-31" xmlns:stpr="http://xbrl.sec.gov/stpr/2018-01-31" xmlns:naics="http://xbrl.sec.gov/naics/2017-01-31" xmlns:invest="http://xbrl.sec.gov/invest/2013-01-31" xmlns:srt-types="http://fasb.org/srt-types/2019-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:hubs="http://www.hubspot.com/20191231" xmlns:srt="http://fasb.org/srt/2019-01-31" xmlns:us-gaap="http://fasb.org/us-gaap/2019-01-31" xmlns:dei="http://xbrl.sec.gov/dei/2019-01-31" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:country="http://xbrl.sec.gov/country/2017-01-31" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:currency="http://xbrl.sec.gov/currency/2019-01-31" xmlns:us-types="http://fasb.org/us-types/2019-01-31" xmlns:exch="http://xbrl.sec.gov/exch/2019-01-31" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.hubspot.com/20191231" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase" />
  <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd" namespace="http://xbrl.sec.gov/country/2017-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd" namespace="http://xbrl.sec.gov/currency/2019-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd" namespace="http://xbrl.sec.gov/dei/2019-01-31" />
  <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/non-numeric" />
  <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/numeric" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/exch/2019/exch-2019-01-31.xsd" namespace="http://xbrl.sec.gov/exch/2019-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" namespace="http://xbrl.sec.gov/invest/2013-01-31" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/role/negated" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/role/net" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd" namespace="http://xbrl.sec.gov/naics/2017-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" namespace="http://xbrl.sec.gov/sic/2011-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd" namespace="http://fasb.org/srt/2019-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/srt/2019/elts/srt-roles-2019-01-31.xsd" namespace="http://fasb.org/srt-roles/2019-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd" namespace="http://fasb.org/srt-types/2019-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd" namespace="http://xbrl.sec.gov/stpr/2018-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd" namespace="http://fasb.org/us-gaap/2019-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd" namespace="http://fasb.org/us-roles/2019-01-31" />
  <xsd:import schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd" namespace="http://fasb.org/us-types/2019-01-31" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType id="TemplateLink" roleURI="http://www.hubspot.com/20191231/role/TemplateLink" xmlns:link="http://www.xbrl.org/2003/linkbase">
        <link:definition>00000 - Document - Template Link</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hubs-20191231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:title="Calculation Links, all" xlink:type="simple" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hubs-20191231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:title="Definition Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hubs-20191231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hubs-20191231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation Links, all" xlink:type="simple" />
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets" id="Role_StatementConsolidatedBalanceSheets">
        <link:definition>100010 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" id="Role_StatementConsolidatedBalanceSheetsParenthetical">
        <link:definition>100020 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperations" id="Role_StatementConsolidatedStatementsOfOperations">
        <link:definition>100030 - Statement - Consolidated Statements of Operations</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveLoss" id="Role_StatementConsolidatedStatementsOfComprehensiveLoss">
        <link:definition>100040 - Statement - Consolidated Statements of Comprehensive Loss</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveLossParenthetical" id="Role_StatementConsolidatedStatementsOfComprehensiveLossParenthetical">
        <link:definition>100050 - Statement - Consolidated Statements of Comprehensive Loss (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfStockholdersEquity" id="Role_StatementConsolidatedStatementsOfStockholdersEquity">
        <link:definition>100060 - Statement - Consolidated Statements of Stockholders&apos; Equity</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfStockholdersEquityParenthetical" id="Role_StatementConsolidatedStatementsOfStockholdersEquityParenthetical">
        <link:definition>100070 - Statement - Consolidated Statements of Stockholders&apos; Equity (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" id="Role_StatementConsolidatedStatementsOfCashFlows">
        <link:definition>100080 - Statement - Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfCashFlowsParenthetical" id="Role_StatementConsolidatedStatementsOfCashFlowsParenthetical">
        <link:definition>100090 - Statement - Consolidated Statements of Cash Flows (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureOrganizationAndOperations" id="Role_DisclosureOrganizationAndOperations">
        <link:definition>100100 - Disclosure - Organization and Operations</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies" id="Role_DisclosureSummaryOfSignificantAccountingPolicies">
        <link:definition>100110 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureFairValueOfFinancialInstruments" id="Role_DisclosureFairValueOfFinancialInstruments">
        <link:definition>100120 - Disclosure - Fair Value of Financial Instruments</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosurePropertyAndEquipment" id="Role_DisclosurePropertyAndEquipment">
        <link:definition>100130 - Disclosure - Property and Equipment</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureBusinessAcquisitions" id="Role_DisclosureBusinessAcquisitions">
        <link:definition>100140 - Disclosure - Business Acquisitions</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwill" id="Role_DisclosureIntangibleAssetsAndGoodwill">
        <link:definition>100150 - Disclosure - Intangible Assets and Goodwill</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrant" id="Role_Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrant">
        <link:definition>100160 - Disclosure - 0.25% Convertible Senior Notes, Convertible Note Hedge and Warrant</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSegmentInformationAndGeographicData" id="Role_DisclosureSegmentInformationAndGeographicData">
        <link:definition>100170 - Disclosure - Segment Information and Geographic Data</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingencies" id="Role_DisclosureCommitmentsAndContingencies">
        <link:definition>100180 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureChangesInAccumulatedOtherComprehensiveLoss" id="Role_DisclosureChangesInAccumulatedOtherComprehensiveLoss">
        <link:definition>100190 - Disclosure - Changes in Accumulated Other Comprehensive Loss</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensation" id="Role_DisclosureStockholdersEquityAndStockBasedCompensation">
        <link:definition>100200 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIncomeTaxes" id="Role_DisclosureIncomeTaxes">
        <link:definition>100210 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlan" id="Role_DisclosureEmployeeBenefitPlan">
        <link:definition>100220 - Disclosure - Employee Benefit Plan</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureQuarterlyFinancialResultsUnaudited" id="Role_DisclosureQuarterlyFinancialResultsUnaudited">
        <link:definition>100230 - Disclosure - Quarterly Financial Results (unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>100240 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesTables" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesTables">
        <link:definition>100250 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsTables" id="Role_DisclosureFairValueOfFinancialInstrumentsTables">
        <link:definition>100260 - Disclosure - Fair Value of Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosurePropertyAndEquipmentTables" id="Role_DisclosurePropertyAndEquipmentTables">
        <link:definition>100270 - Disclosure - Property and Equipment (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureBusinessAcquisitionsTables" id="Role_DisclosureBusinessAcquisitionsTables">
        <link:definition>100280 - Disclosure - Business Acquisitions (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillTables" id="Role_DisclosureIntangibleAssetsAndGoodwillTables">
        <link:definition>100290 - Disclosure - Intangible Assets and Goodwill (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantTables" id="Role_Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantTables">
        <link:definition>100300 - Disclosure - 0.25% Convertible Senior Notes, Convertible Note Hedge and Warrant (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSegmentInformationAndGeographicDataTables" id="Role_DisclosureSegmentInformationAndGeographicDataTables">
        <link:definition>100310 - Disclosure - Segment Information and Geographic Data (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" id="Role_DisclosureCommitmentsAndContingenciesTables">
        <link:definition>100320 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureChangesInAccumulatedOtherComprehensiveLossTables" id="Role_DisclosureChangesInAccumulatedOtherComprehensiveLossTables">
        <link:definition>100330 - Disclosure - Changes in Accumulated Other Comprehensive Loss (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensationTables" id="Role_DisclosureStockholdersEquityAndStockBasedCompensationTables">
        <link:definition>100340 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIncomeTaxesTables" id="Role_DisclosureIncomeTaxesTables">
        <link:definition>100350 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureQuarterlyFinancialResultsUnauditedTables" id="Role_DisclosureQuarterlyFinancialResultsUnauditedTables">
        <link:definition>100360 - Disclosure - Quarterly Financial Results (unaudited) (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureOrganizationAndOperationsAdditionalInformationDetail" id="Role_DisclosureOrganizationAndOperationsAdditionalInformationDetail">
        <link:definition>100370 - Disclosure - Organization and Operations - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail">
        <link:definition>100380 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfReconciliationOfDenominatorUsedInCalculationOfBasicAndDilutedLossPerShareDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfReconciliationOfDenominatorUsedInCalculationOfBasicAndDilutedLossPerShareDetail">
        <link:definition>100390 - Disclosure - Summary of Significant Accounting Policies - Summary of Reconciliation of Denominator Used in Calculation of Basic and Diluted Loss Per Share (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPotentiallyDilutiveCommonStockEquivalentsDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPotentiallyDilutiveCommonStockEquivalentsDetail">
        <link:definition>100400 - Disclosure - Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Common Stock Equivalents (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfRollForwardOfCompanySAllowanceForDoubtfulAccountsDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfRollForwardOfCompanySAllowanceForDoubtfulAccountsDetail">
        <link:definition>100410 - Disclosure - Summary of Significant Accounting Policies - Schedule of Roll Forward of Company&apos;s Allowance for Doubtful Accounts (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfReconciliationOfCashCashEquivalentsAndRestrictedCashDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfReconciliationOfCashCashEquivalentsAndRestrictedCashDetail">
        <link:definition>100420 - Disclosure - Summary of Significant Accounting Policies - Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPropertyPlantAndEquipmentUsefulLifeDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfPropertyPlantAndEquipmentUsefulLifeDetail">
        <link:definition>100430 - Disclosure - Summary of Significant Accounting Policies - Schedule of Property Plant and Equipment Useful Life (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfLeaseAssetsAndLiabilitiesDetails" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfLeaseAssetsAndLiabilitiesDetails">
        <link:definition>100440 - Disclosure - Summary of Significant Accounting Policies - Summary of Lease Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfReconciliationBetweenNonCancelableLeaseCommitmentsAndLeaseLiabilitiesDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfReconciliationBetweenNonCancelableLeaseCommitmentsAndLeaseLiabilitiesDetail">
        <link:definition>100450 - Disclosure - Summary of Significant Accounting Policies - Summary of Reconciliation between Non-cancelable Lease Commitments and Lease Liabilities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfWeightedAverageRemainingLeaseTermsAndWeightedAverageDiscountRateForOperatingAndFinanceLeasesDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfWeightedAverageRemainingLeaseTermsAndWeightedAverageDiscountRateForOperatingAndFinanceLeasesDetail">
        <link:definition>100460 - Disclosure - Summary of Significant Accounting Policies - Summary of Weighted Average Remaining Lease Terms and Weighted Average Discount Rate for Operating and Finance Leases (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfChangesInAssetRetirementObligationsDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfChangesInAssetRetirementObligationsDetail">
        <link:definition>100470 - Disclosure - Summary of Significant Accounting Policies - Schedule of Changes in Asset Retirement Obligations (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation1Detail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation1Detail">
        <link:definition>100480 - Disclosure - Summary of Significant Accounting Policies - Additional Information1 (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation1DetailDefault" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation1DetailDefault">
        <link:definition>100480 - Disclosure - Summary of Significant Accounting Policies - Additional Information1 (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfCapitalizedSoftwareDevelopmentCostsExclusiveOfThoseCostsRecordedWithinPropertyAndEquipmentDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfCapitalizedSoftwareDevelopmentCostsExclusiveOfThoseCostsRecordedWithinPropertyAndEquipmentDetail">
        <link:definition>100490 - Disclosure - Summary of Significant Accounting Policies - Summary of Capitalized Software Development Costs, Exclusive of those Costs Recorded within Property and Equipment (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsScheduleOfFairValueOfFinancialAssetsAndLiabilitiesDetail" id="Role_DisclosureFairValueOfFinancialInstrumentsScheduleOfFairValueOfFinancialAssetsAndLiabilitiesDetail">
        <link:definition>100500 - Disclosure - Fair Value of Financial Instruments - Schedule of Fair Value of Financial Assets and Liabilities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsAdditionalInformationDetail" id="Role_DisclosureFairValueOfFinancialInstrumentsAdditionalInformationDetail">
        <link:definition>100510 - Disclosure - Fair Value of Financial Instruments - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsSummaryOfCompositionOfShortAndLongTermInvestmentsDetail" id="Role_DisclosureFairValueOfFinancialInstrumentsSummaryOfCompositionOfShortAndLongTermInvestmentsDetail">
        <link:definition>100520 - Disclosure - Fair Value of Financial Instruments - Summary of Composition of Short and Long Term Investments (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsSummaryOfContractualMaturitiesOfShortAndLongTermInvestmentsDetail" id="Role_DisclosureFairValueOfFinancialInstrumentsSummaryOfContractualMaturitiesOfShortAndLongTermInvestmentsDetail">
        <link:definition>100530 - Disclosure - Fair Value of Financial Instruments - Summary of Contractual Maturities of Short and Long Term Investments (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosurePropertyAndEquipmentScheduleOfPropertyAndEquipmentDetail" id="Role_DisclosurePropertyAndEquipmentScheduleOfPropertyAndEquipmentDetail">
        <link:definition>100540 - Disclosure - Property and Equipment - Schedule of Property and Equipment (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetail" id="Role_DisclosurePropertyAndEquipmentAdditionalInformationDetail">
        <link:definition>100550 - Disclosure - Property and Equipment - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureBusinessAcquisitionsAdditionalInformationDetail" id="Role_DisclosureBusinessAcquisitionsAdditionalInformationDetail">
        <link:definition>100560 - Disclosure - Business Acquisitions - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureBusinessAcquisitionsSummaryOfFairValueOfAssetsAcquiredAndLiabilitiesAssumedDetail" id="Role_DisclosureBusinessAcquisitionsSummaryOfFairValueOfAssetsAcquiredAndLiabilitiesAssumedDetail">
        <link:definition>100570 - Disclosure - Business Acquisitions - Summary of Fair Value of Assets Acquired and Liabilities Assumed (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillScheduleOfIntangibleAssetsDetail" id="Role_DisclosureIntangibleAssetsAndGoodwillScheduleOfIntangibleAssetsDetail">
        <link:definition>100580 - Disclosure - Intangible Assets and Goodwill - Schedule of Intangible Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillAdditionalInformationDetail" id="Role_DisclosureIntangibleAssetsAndGoodwillAdditionalInformationDetail">
        <link:definition>100590 - Disclosure - Intangible Assets and Goodwill - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillEstimatedFutureAmortizationExpenseForIntangibleAssetsDetail" id="Role_DisclosureIntangibleAssetsAndGoodwillEstimatedFutureAmortizationExpenseForIntangibleAssetsDetail">
        <link:definition>100600 - Disclosure - Intangible Assets and Goodwill - Estimated Future Amortization Expense for Intangible Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillScheduleOfChangesInCarryingAmountsOfGoodwillDetail" id="Role_DisclosureIntangibleAssetsAndGoodwillScheduleOfChangesInCarryingAmountsOfGoodwillDetail">
        <link:definition>100610 - Disclosure - Intangible Assets and Goodwill - Schedule of Changes in Carrying Amounts of Goodwill (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantAdditionalInformationDetail" id="Role_Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantAdditionalInformationDetail">
        <link:definition>100620 - Disclosure - 0.25% Convertible Senior Notes, Convertible Note Hedge and Warrant - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantScheduleOfNetCarryingAmountOfLiabilityComponentDetail" id="Role_Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantScheduleOfNetCarryingAmountOfLiabilityComponentDetail">
        <link:definition>100630 - Disclosure - 0.25% Convertible Senior Notes, Convertible Note Hedge and Warrant - Schedule of Net Carrying Amount of Liability Component (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantScheduleOfNetCarryingAmountOfEquityComponentDetail" id="Role_Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantScheduleOfNetCarryingAmountOfEquityComponentDetail">
        <link:definition>100640 - Disclosure - 0.25% Convertible Senior Notes, Convertible Note Hedge and Warrant - Schedule of Net Carrying Amount of Equity Component (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantScheduleOfInterestExpenseDetail" id="Role_Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantScheduleOfInterestExpenseDetail">
        <link:definition>100650 - Disclosure - 0.25% Convertible Senior Notes, Convertible Note Hedge and Warrant - Schedule of Interest Expense (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantScheduleOfNetEquityImpactIncludedInAdditionalPaidInCapitalOfLiabilityAndEquityComponentsDetail" id="Role_Disclosure025ConvertibleSeniorNotesConvertibleNoteHedgeAndWarrantScheduleOfNetEquityImpactIncludedInAdditionalPaidInCapitalOfLiabilityAndEquityComponentsDetail">
        <link:definition>100660 - Disclosure - 0.25% Convertible Senior Notes, Convertible Note Hedge and Warrant - Schedule of Net Equity Impact, Included in Additional Paid-in Capital, of the Liability and Equity Components (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSegmentInformationAndGeographicDataAdditionalInformationDetail" id="Role_DisclosureSegmentInformationAndGeographicDataAdditionalInformationDetail">
        <link:definition>100670 - Disclosure - Segment Information and Geographic Data - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSegmentInformationAndGeographicDataRevenuesByGeographicalRegionDetail" id="Role_DisclosureSegmentInformationAndGeographicDataRevenuesByGeographicalRegionDetail">
        <link:definition>100680 - Disclosure - Segment Information and Geographic Data - Revenues by Geographical Region (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureSegmentInformationAndGeographicDataLongLivedAssetsByGeographicalRegionDetail" id="Role_DisclosureSegmentInformationAndGeographicDataLongLivedAssetsByGeographicalRegionDetail">
        <link:definition>100690 - Disclosure - Segment Information and Geographic Data - Long Lived Assets by Geographical Region (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetail" id="Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail">
        <link:definition>100700 - Disclosure - Commitments and Contingencies- Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumPaymentsDetail" id="Role_DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumPaymentsDetail">
        <link:definition>100710 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Payments (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumPaymentsUnderVendorCommitmentsDetail" id="Role_DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumPaymentsUnderVendorCommitmentsDetail">
        <link:definition>100720 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Payments Under Vendor Commitments (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureChangesInAccumulatedOtherComprehensiveLossChangesInAccumulatedOtherComprehensiveLossDetail" id="Role_DisclosureChangesInAccumulatedOtherComprehensiveLossChangesInAccumulatedOtherComprehensiveLossDetail">
        <link:definition>100730 - Disclosure - Changes in Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensationAdditionalInformationDetail" id="Role_DisclosureStockholdersEquityAndStockBasedCompensationAdditionalInformationDetail">
        <link:definition>100740 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensationSummaryOfNumberOfSharesOfCommonStockReservedDetail" id="Role_DisclosureStockholdersEquityAndStockBasedCompensationSummaryOfNumberOfSharesOfCommonStockReservedDetail">
        <link:definition>100750 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation - Summary of Number of Shares of Common Stock Reserved (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensationScheduleOfStockCompensationExpenseByAwardTypeDetail" id="Role_DisclosureStockholdersEquityAndStockBasedCompensationScheduleOfStockCompensationExpenseByAwardTypeDetail">
        <link:definition>100760 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation - Schedule of Stock Compensation Expense by Award Type (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensationEffectOfStockBasedCompensationOnIncomeByLineItemDetail" id="Role_DisclosureStockholdersEquityAndStockBasedCompensationEffectOfStockBasedCompensationOnIncomeByLineItemDetail">
        <link:definition>100770 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation - Effect of Stock-Based Compensation on Income by Line Item (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensationScheduleOfAssumptionsUsedForEstimationOfFairValueOfOptionsGrantedToEmployeesDetail" id="Role_DisclosureStockholdersEquityAndStockBasedCompensationScheduleOfAssumptionsUsedForEstimationOfFairValueOfOptionsGrantedToEmployeesDetail">
        <link:definition>100780 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation - Schedule of Assumptions Used for Estimation of Fair Value of Options Granted to Employees (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensationSummaryOfStockOptionActivityDetail" id="Role_DisclosureStockholdersEquityAndStockBasedCompensationSummaryOfStockOptionActivityDetail">
        <link:definition>100790 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation - Summary of Stock Option Activity (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensationSummaryOfActivityRelatedToRsusDetail" id="Role_DisclosureStockholdersEquityAndStockBasedCompensationSummaryOfActivityRelatedToRsusDetail">
        <link:definition>100800 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation - Summary of Activity Related to RSUs (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureStockholdersEquityAndStockBasedCompensationSummaryOfActivityRelatedToEmployeeStockPurchasePlanDetail" id="Role_DisclosureStockholdersEquityAndStockBasedCompensationSummaryOfActivityRelatedToEmployeeStockPurchasePlanDetail">
        <link:definition>100810 - Disclosure - Stockholders&apos; Equity and Stock-Based Compensation - Summary of Activity Related to Employee Stock Purchase Plan (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIncomeTaxesScheduleOfLossBeforeProvisionForIncomeTaxesDetail" id="Role_DisclosureIncomeTaxesScheduleOfLossBeforeProvisionForIncomeTaxesDetail">
        <link:definition>100820 - Disclosure - Income Taxes - Schedule of Loss Before Provision for Income Taxes (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxProvisionBenefitDetail" id="Role_DisclosureIncomeTaxesComponentsOfIncomeTaxProvisionBenefitDetail">
        <link:definition>100830 - Disclosure - Income Taxes - Components of Income Tax (Provision) Benefit (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" id="Role_DisclosureIncomeTaxesAdditionalInformationDetail">
        <link:definition>100840 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIncomeTaxesScheduleOfDifferencesBetweenIncomeTaxesComputedAtFederalStatutoryRateAndProvisionForIncomeTaxesDetail" id="Role_DisclosureIncomeTaxesScheduleOfDifferencesBetweenIncomeTaxesComputedAtFederalStatutoryRateAndProvisionForIncomeTaxesDetail">
        <link:definition>100850 - Disclosure - Income Taxes - Schedule of Differences Between Income Taxes Computed at the Federal Statutory Rate and the Provision for Income Taxes (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIncomeTaxesComponentsOfCompanySDeferredTaxAssetsAndLiabilitiesDetail" id="Role_DisclosureIncomeTaxesComponentsOfCompanySDeferredTaxAssetsAndLiabilitiesDetail">
        <link:definition>100860 - Disclosure - Income Taxes - Components of the Company&apos;s Deferred Tax Assets and Liabilities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureIncomeTaxesSummaryOfActivityRelatedToUnrecognizedTaxBenefitsDetail" id="Role_DisclosureIncomeTaxesSummaryOfActivityRelatedToUnrecognizedTaxBenefitsDetail">
        <link:definition>100870 - Disclosure - Income Taxes - Summary of Activity Related to Unrecognized Tax Benefits (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureEmployeeBenefitPlanAdditionalInformationDetail" id="Role_DisclosureEmployeeBenefitPlanAdditionalInformationDetail">
        <link:definition>100880 - Disclosure - Employee Benefit Plan - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.hubspot.com/20191231/taxonomy/role/DisclosureQuarterlyFinancialResultsUnauditedScheduleOfQuarterlyFinancialResultsDetail" id="Role_DisclosureQuarterlyFinancialResultsUnauditedScheduleOfQuarterlyFinancialResultsDetail">
        <link:definition>100890 - Disclosure - Quarterly Financial Results (Unaudited) - Schedule of Quarterly Financial Results (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element id="hubs_RestrictedCashFairValueDisclosure" name="RestrictedCashFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_LesseeOperatingLeaseLegallyBindingMinimumLeasePaymentsForLeasesSignedButNotYetCommenced" name="LesseeOperatingLeaseLegallyBindingMinimumLeasePaymentsForLeasesSignedButNotYetCommenced" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_LesseeFinanceLeaseLegallyBindingMinimumLeasePaymentsForLeasesSignedButNotYetCommenced" name="LesseeFinanceLeaseLegallyBindingMinimumLeasePaymentsForLeasesSignedButNotYetCommenced" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_IncomeTaxReconciliationConvertibleDebtAndAcquisition" name="IncomeTaxReconciliationConvertibleDebtAndAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_IncomeTaxRateReconciliationTransitionTax" name="IncomeTaxRateReconciliationTransitionTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_IncomeTaxReconciliationTaxCutsAndJobsActOf2017GlobalIntangibleLowTaxedIncomeInclusion" name="IncomeTaxReconciliationTaxCutsAndJobsActOf2017GlobalIntangibleLowTaxedIncomeInclusion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_DeferredTaxAssetsInterestExpense" name="DeferredTaxAssetsInterestExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_DeferredTaxLiabilitiesConvertibleDebt" name="DeferredTaxLiabilitiesConvertibleDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_DeferredTaxLiabilitiesDepreciation" name="DeferredTaxLiabilitiesDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_CumulativeAdjustmentFromAdoptionOfStockCompensationStandard" name="CumulativeAdjustmentFromAdoptionOfStockCompensationStandard" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_CumulativeAdjustmentFromAdoptionOfRevenueRecognitionStandard" name="CumulativeAdjustmentFromAdoptionOfRevenueRecognitionStandard" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_StockIssuanceCosts" name="StockIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_AccretionAmortizationOfDebtDiscountPremium" name="AccretionAmortizationOfDebtDiscountPremium" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_NoncashRentExpense" name="NoncashRentExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_IncreaseDecreaseInRightOfUseAssets" name="IncreaseDecreaseInRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_IncreaseDecreaseInLeaseLiabilities" name="IncreaseDecreaseInLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_PaymentForPurchaseOfStrategicInvestments" name="PaymentForPurchaseOfStrategicInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_StockholdersEquityAndStockBasedCompensationAbstract" name="StockholdersEquityAndStockBasedCompensationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_StrategicInvestmentsPolicyTextBlock" name="StrategicInvestmentsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_CapitalizedSoftwareDevelopmentCostsPolicyPolicyTextBlock" name="CapitalizedSoftwareDevelopmentCostsPolicyPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_ScheduleOfCashAndCashEquivalentsRestrictedCashAndCashEquivalentsTableTextBlock" name="ScheduleOfCashAndCashEquivalentsRestrictedCashAndCashEquivalentsTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_PropertyAndEquipmentExpectedUsefulLifeTableTextBlock" name="PropertyAndEquipmentExpectedUsefulLifeTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_SummaryOfLeaseAssetsAndLiabilitiesTableTextBlock" name="SummaryOfLeaseAssetsAndLiabilitiesTableTextBlock" type="nonnum:escapedItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_SummaryOfReconciliationBetweenNonCancelableLeaseCommitmentsAndLeaseLiabilitiesTableTextBlock" name="SummaryOfReconciliationBetweenNonCancelableLeaseCommitmentsAndLeaseLiabilitiesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_SummaryOfWeightedAverageRemainingLeaseTermsAndWeightedAverageDiscountRateForOperatingAndFinanceLeasesTableTextBlock" name="SummaryOfWeightedAverageRemainingLeaseTermsAndWeightedAverageDiscountRateForOperatingAndFinanceLeasesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_SummaryOfCapitalizedSoftwareDevelopmentCostsTableTextBlock" name="SummaryOfCapitalizedSoftwareDevelopmentCostsTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoAsLiabilityComponentMember" name="ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoAsLiabilityComponentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoAsEquityComponentMember" name="ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoAsEquityComponentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_ScheduleOfInterestExpenseTableTextBlock" name="ScheduleOfInterestExpenseTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_ComponentsOfNetEquityImpactOnAdditionalPaidInCapitalTableTextBlock" name="ComponentsOfNetEquityImpactOnAdditionalPaidInCapitalTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_CommonStockReservedForConversionAndIncentivePlansTableTextBlock" name="CommonStockReservedForConversionAndIncentivePlansTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_OrganizationAndOperationsLineItems" name="OrganizationAndOperationsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_OrganizationAndOperationsTable" name="OrganizationAndOperationsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_RegulatoryAssetsAbstract" name="RegulatoryAssetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_ScheduleOfAccountingPoliciesLineItems" name="ScheduleOfAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_ScheduleOfAccountingPoliciesTable" name="ScheduleOfAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_AccruedExpensesAndOtherCurrentLiabilitiesMember" name="AccruedExpensesAndOtherCurrentLiabilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_CashAndCashEquivalentsMaturityDescription" name="CashAndCashEquivalentsMaturityDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_EmployeeRelatedComputerEquipmentMember" name="EmployeeRelatedComputerEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_ComputerEquipmentAndPurchasedSoftwareMember" name="ComputerEquipmentAndPurchasedSoftwareMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_BusinessCombinationMeasurementPeriod" name="BusinessCombinationMeasurementPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_LeaseAssets" name="LeaseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_LeaseLiability" name="LeaseLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_IncreaseInFutureLeaseCommitments" name="IncreaseInFutureLeaseCommitments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_WeightedAverageRemainingLeaseTermAbstract" name="WeightedAverageRemainingLeaseTermAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_WeightedAverageRemainingDiscountRateAbstract" name="WeightedAverageRemainingDiscountRateAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_RevenueSubscriptionContractPeriod" name="RevenueSubscriptionContractPeriod" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_ContractWithCustomerLiabilityAdditions" name="ContractWithCustomerLiabilityAdditions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_CalculatedBillings" name="CalculatedBillings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_RevenueRemainingPerformanceObligationContractPeriod" name="RevenueRemainingPerformanceObligationContractPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_RevenueRemainingPerformanceObligationPercentageRecognized" name="RevenueRemainingPerformanceObligationPercentageRecognized" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_AmortizationPeriodOfDeferredSalesCommissions" name="AmortizationPeriodOfDeferredSalesCommissions" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_IncreaseDecreaseInDeferredSalesCommission" name="IncreaseDecreaseInDeferredSalesCommission" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_IncrementalCostsOfDeferredSalesCommission" name="IncrementalCostsOfDeferredSalesCommission" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_AccountsReceivablePaymentPeriod" name="AccountsReceivablePaymentPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_NumberOfCustomers" name="NumberOfCustomers" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_StockBasedCompensationInCapitalizedSoftwareExclusiveOfCostRecordedWithinPropertyAndEquipment" name="StockBasedCompensationInCapitalizedSoftwareExclusiveOfCostRecordedWithinPropertyAndEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_MinimumTaxBenefitLikelyOfBeingRealizedUponUltimateSettlementWithTaxAuthorityPercentage" name="MinimumTaxBenefitLikelyOfBeingRealizedUponUltimateSettlementWithTaxAuthorityPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_DeferredSalesCommissionCurrent" name="DeferredSalesCommissionCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoMember" name="ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_StrategicInvestmentsMember" name="StrategicInvestmentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_USTreasurySecuritiesExcludingCashAndCashEquivalentsMember" name="USTreasurySecuritiesExcludingCashAndCashEquivalentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_FinanceLeaseRightOfUseAssetAccumulatedDepreciation" name="FinanceLeaseRightOfUseAssetAccumulatedDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_BusinessCombinationPotentialConsideration" name="BusinessCombinationPotentialConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_BusinessCombinationPotentialConsiderationRecordingPeriod" name="BusinessCombinationPotentialConsiderationRecordingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_PaymentsToAcquireBusinessesWorkingCapitalSettlement" name="PaymentsToAcquireBusinessesWorkingCapitalSettlement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_PieSyncNVMember" name="PieSyncNVMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_DevelopedTechnologyMember" name="DevelopedTechnologyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_MotionAIIncorporationMember" name="MotionAIIncorporationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherCurrentAndNonCurrentAssets" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherCurrentAndNonCurrentAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAndAccruedExpensesAndOtherLiabilities" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAndAccruedExpensesAndOtherLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_IntangibleLiabilityDisclosureAbstract" name="IntangibleLiabilityDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_FiniteLivedIntangibleAssetsFutureAmortizationExpense" name="FiniteLivedIntangibleAssetsFutureAmortizationExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_ScenarioOneMember" name="ScenarioOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_ScenarioTwoMember" name="ScenarioTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_LiabilityComponentMember" name="LiabilityComponentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_EquityComponentMember" name="EquityComponentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_DebtInstrumentConvertibleConversionRatioDenominator" name="DebtInstrumentConvertibleConversionRatioDenominator" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_DebtInstrumentConvertibleGrossCarryingAmountOfTheEquityComponent" name="DebtInstrumentConvertibleGrossCarryingAmountOfTheEquityComponent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_NumberOfCommonSharesToBeRepurchasedUnderConvertibleNoteHedgeTransactions" name="NumberOfCommonSharesToBeRepurchasedUnderConvertibleNoteHedgeTransactions" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="hubs_HedgingOptionStrikePricePerCommonStock" name="HedgingOptionStrikePricePerCommonStock" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_SettlementPeriodOfWarrantsExcessPriceOverStrikePrice" name="SettlementPeriodOfWarrantsExcessPriceOverStrikePrice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_ConvertibleNotesHedgeAndWarrantTransactionsCostNet" name="ConvertibleNotesHedgeAndWarrantTransactionsCostNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_CommonStockSharesReservedForUnderlyingWarrants" name="CommonStockSharesReservedForUnderlyingWarrants" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="hubs_WarrantsExpectedToSettleDescription" name="WarrantsExpectedToSettleDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_WarrantsExpectedToSettleCommencementDate" name="WarrantsExpectedToSettleCommencementDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_AdjustmentsToAdditionalPaidInCapitalDeferredTaxLiability" name="AdjustmentsToAdditionalPaidInCapitalDeferredTaxLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_DebtInstrumentConversionOptionOfTheNetEquity" name="DebtInstrumentConversionOptionOfTheNetEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hubs_AdjustmentsToAdditionalPaidInCapitalDebtIssuanceCosts" name="AdjustmentsToAdditionalPaidInCapitalDebtIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoAsNetEquityImpactMember" name="ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoAsNetEquityImpactMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_RestOfTheWorldMember" name="RestOfTheWorldMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_OutsideOfAmericasMember" name="OutsideOfAmericasMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_RightOfUseAssetAndPropertyPlantAndEquipmentNet" name="RightOfUseAssetAndPropertyPlantAndEquipmentNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_ProductRelatedObligationsMember" name="ProductRelatedObligationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_INBOUNDEventObligationsMember" name="INBOUNDEventObligationsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_TwoThousandSevenEquityIncentivePlanMember" name="TwoThousandSevenEquityIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_TwoThousandAndFourteenEquityIncentivePlanMember" name="TwoThousandAndFourteenEquityIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_CostOfSubscriptionRevenuesMember" name="CostOfSubscriptionRevenuesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_CostOfServicesRevenueMember" name="CostOfServicesRevenueMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_ServiceAgreementMaturityTerm" name="ServiceAgreementMaturityTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_PercentageOfServiceAgreementPayment" name="PercentageOfServiceAgreementPayment" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_StockBasedCompensationExpenseRecorded" name="StockBasedCompensationExpenseRecorded" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_ShareBasedCompensationArrangementByShareBasedPaymentAwardServiceAgreementPeriodDescription" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardServiceAgreementPeriodDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestNumber" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestNumber" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="hubs_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestIntrinsicValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_PercentageOfDiscountToEmployeesOnPurchaseOfCommonStockUnderEmployeeStockPurchasePlan" name="PercentageOfDiscountToEmployeesOnPurchaseOfCommonStockUnderEmployeeStockPurchasePlan" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_ReconciliationOfIncomeTaxesLineItems" name="ReconciliationOfIncomeTaxesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_ReconciliationOfIncomeTaxesTable" name="ReconciliationOfIncomeTaxesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hubs_DeferredTaxAssetsOperatingLossCarryforwardsDomesticAndStateAndLocal" name="DeferredTaxAssetsOperatingLossCarryforwardsDomesticAndStateAndLocal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hubs_OperatingLossCarryForwardsPeriod" name="OperatingLossCarryForwardsPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hubs_DeferredTaxAssetsInterestExpenseCarryforward" name="DeferredTaxAssetsInterestExpenseCarryforward" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
</xsd:schema>
