<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:d41be288-2d32-4c6f-b1ca-17cc6fdabfb1,g:804a0d64-520b-4bf5-a373-31fc5af6ccd4-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:cloud="http://www.cloudflare.com/20250630" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.cloudflare.com/20250630">
  <xs:import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cloud-20250630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cloud-20250630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cloud-20250630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cloud-20250630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="Cover" roleURI="http://www.cloudflare.com/role/Cover">
        <link:definition>0000001 - Document - Cover</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDBALANCESHEETS" roleURI="http://www.cloudflare.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS">
        <link:definition>9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" roleURI="http://www.cloudflare.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical">
        <link:definition>9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" roleURI="http://www.cloudflare.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS">
        <link:definition>9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS" roleURI="http://www.cloudflare.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS">
        <link:definition>9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" roleURI="http://www.cloudflare.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY">
        <link:definition>9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS&#8217; EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" roleURI="http://www.cloudflare.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OrganizationandBasisofPresentation" roleURI="http://www.cloudflare.com/role/OrganizationandBasisofPresentation">
        <link:definition>9952157 - Disclosure - Organization and Basis of Presentation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPolicies" roleURI="http://www.cloudflare.com/role/SummaryofSignificantAccountingPolicies">
        <link:definition>9952158 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Revenue" roleURI="http://www.cloudflare.com/role/Revenue">
        <link:definition>9952159 - Disclosure - Revenue</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurements" roleURI="http://www.cloudflare.com/role/FairValueMeasurements">
        <link:definition>9952160 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetComponents" roleURI="http://www.cloudflare.com/role/BalanceSheetComponents">
        <link:definition>9952161 - Disclosure - Balance Sheet Components</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Leases" roleURI="http://www.cloudflare.com/role/Leases">
        <link:definition>9952162 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangements" roleURI="http://www.cloudflare.com/role/FinancingArrangements">
        <link:definition>9952163 - Disclosure - Financing Arrangements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://www.cloudflare.com/role/CommitmentsandContingencies">
        <link:definition>9952164 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommonStock" roleURI="http://www.cloudflare.com/role/CommonStock">
        <link:definition>9952165 - Disclosure - Common Stock</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockbasedCompensation" roleURI="http://www.cloudflare.com/role/StockbasedCompensation">
        <link:definition>9952166 - Disclosure - Stock-based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetLossperShareAttributabletoCommonStockholders" roleURI="http://www.cloudflare.com/role/NetLossperShareAttributabletoCommonStockholders">
        <link:definition>9952167 - Disclosure - Net Loss per Share Attributable to Common Stockholders</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.cloudflare.com/role/IncomeTaxes">
        <link:definition>9952168 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessCombinations" roleURI="http://www.cloudflare.com/role/BusinessCombinations">
        <link:definition>9952169 - Disclosure - Business Combinations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentandGeographicInformation" roleURI="http://www.cloudflare.com/role/SegmentandGeographicInformation">
        <link:definition>9952170 - Disclosure - Segment and Geographic Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesPolicies" roleURI="http://www.cloudflare.com/role/SummaryofSignificantAccountingPoliciesPolicies">
        <link:definition>9955511 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueTables" roleURI="http://www.cloudflare.com/role/RevenueTables">
        <link:definition>9955512 - Disclosure - Revenue (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsTables" roleURI="http://www.cloudflare.com/role/FairValueMeasurementsTables">
        <link:definition>9955513 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetComponentsTables" roleURI="http://www.cloudflare.com/role/BalanceSheetComponentsTables">
        <link:definition>9955514 - Disclosure - Balance Sheet Components (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesTables" roleURI="http://www.cloudflare.com/role/LeasesTables">
        <link:definition>9955515 - Disclosure - Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangementsTables" roleURI="http://www.cloudflare.com/role/FinancingArrangementsTables">
        <link:definition>9955516 - Disclosure - Financing Arrangements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommonStockTables" roleURI="http://www.cloudflare.com/role/CommonStockTables">
        <link:definition>9955517 - Disclosure - Common Stock (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockbasedCompensationTables" roleURI="http://www.cloudflare.com/role/StockbasedCompensationTables">
        <link:definition>9955518 - Disclosure - Stock-based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetLossperShareAttributabletoCommonStockholdersTables" roleURI="http://www.cloudflare.com/role/NetLossperShareAttributabletoCommonStockholdersTables">
        <link:definition>9955519 - Disclosure - Net Loss per Share Attributable to Common Stockholders (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessCombinationsTables" roleURI="http://www.cloudflare.com/role/BusinessCombinationsTables">
        <link:definition>9955520 - Disclosure - Business Combinations (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentandGeographicInformationTables" roleURI="http://www.cloudflare.com/role/SegmentandGeographicInformationTables">
        <link:definition>9955521 - Disclosure - Segment and Geographic Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueDisaggregationofRevenueDetails" roleURI="http://www.cloudflare.com/role/RevenueDisaggregationofRevenueDetails">
        <link:definition>9955522 - Disclosure - Revenue - Disaggregation of Revenue (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueNarrativeDetails" roleURI="http://www.cloudflare.com/role/RevenueNarrativeDetails">
        <link:definition>9955523 - Disclosure - Revenue - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueDeferredContractAcquisitionCostsDetails" roleURI="http://www.cloudflare.com/role/RevenueDeferredContractAcquisitionCostsDetails">
        <link:definition>9955524 - Disclosure - Revenue - Deferred Contract Acquisition Costs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRemainingPerformanceObligationsDetails" roleURI="http://www.cloudflare.com/role/RevenueRemainingPerformanceObligationsDetails">
        <link:definition>9955525 - Disclosure - Revenue - Remaining Performance Obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRemainingPerformanceObligationsDetails_1" roleURI="http://www.cloudflare.com/role/RevenueRemainingPerformanceObligationsDetails_1">
        <link:definition>9955525 - Disclosure - Revenue - Remaining Performance Obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsScheduleofCashandAvailableforsaleDebtSecuritiesAmortizedCostUnrealizedGainsLossesandFairValuebySignificantInvestmentCategoryDetails" roleURI="http://www.cloudflare.com/role/FairValueMeasurementsScheduleofCashandAvailableforsaleDebtSecuritiesAmortizedCostUnrealizedGainsLossesandFairValuebySignificantInvestmentCategoryDetails">
        <link:definition>9955526 - Disclosure - Fair Value Measurements - Schedule of Cash and Available-for-sale Debt Securities' Amortized Cost, Unrealized Gains (Losses) and Fair Value by Significant Investment Category (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsScheduleofCashandAvailableforsaleDebtSecuritiesAmortizedCostUnrealizedGainsLossesandFairValuebySignificantInvestmentCategoryDetails_1" roleURI="http://www.cloudflare.com/role/FairValueMeasurementsScheduleofCashandAvailableforsaleDebtSecuritiesAmortizedCostUnrealizedGainsLossesandFairValuebySignificantInvestmentCategoryDetails_1">
        <link:definition>9955526 - Disclosure - Fair Value Measurements - Schedule of Cash and Available-for-sale Debt Securities' Amortized Cost, Unrealized Gains (Losses) and Fair Value by Significant Investment Category (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsNarrativeDetails" roleURI="http://www.cloudflare.com/role/FairValueMeasurementsNarrativeDetails">
        <link:definition>9955527 - Disclosure - Fair Value Measurements - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetComponentsAccountsReceivableNetDetails" roleURI="http://www.cloudflare.com/role/BalanceSheetComponentsAccountsReceivableNetDetails">
        <link:definition>9955528 - Disclosure - Balance Sheet Components - Accounts Receivable, Net (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetComponentsPropertyandEquipmentNetDetails" roleURI="http://www.cloudflare.com/role/BalanceSheetComponentsPropertyandEquipmentNetDetails">
        <link:definition>9955529 - Disclosure - Balance Sheet Components - Property and Equipment, Net (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetComponentsNarrativeDetails" roleURI="http://www.cloudflare.com/role/BalanceSheetComponentsNarrativeDetails">
        <link:definition>9955530 - Disclosure - Balance Sheet Components - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetComponentsAcquiredIntangibleAssetsNetDetails" roleURI="http://www.cloudflare.com/role/BalanceSheetComponentsAcquiredIntangibleAssetsNetDetails">
        <link:definition>9955531 - Disclosure - Balance Sheet Components - Acquired Intangible Assets, Net (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetComponentsEstimatedFutureAmortizationExpenseofAcquiredIntangibleAssetsNetDetails" roleURI="http://www.cloudflare.com/role/BalanceSheetComponentsEstimatedFutureAmortizationExpenseofAcquiredIntangibleAssetsNetDetails">
        <link:definition>9955532 - Disclosure - Balance Sheet Components - Estimated Future Amortization Expense of Acquired Intangible Assets, Net (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesNarrativeDetails" roleURI="http://www.cloudflare.com/role/LeasesNarrativeDetails">
        <link:definition>9955533 - Disclosure - Leases - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesScheduleofLeaseCostsDetails" roleURI="http://www.cloudflare.com/role/LeasesScheduleofLeaseCostsDetails">
        <link:definition>9955534 - Disclosure - Leases - Schedule of Lease Costs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesLeaseLiabilityMaturitiesDetails" roleURI="http://www.cloudflare.com/role/LeasesLeaseLiabilityMaturitiesDetails">
        <link:definition>9955535 - Disclosure - Leases - Lease Liability Maturities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesLeaseLiabilityMaturitiesDetails_1" roleURI="http://www.cloudflare.com/role/LeasesLeaseLiabilityMaturitiesDetails_1">
        <link:definition>9955535 - Disclosure - Leases - Lease Liability Maturities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangements2030ConvertibleSeniorNotesDetails" roleURI="http://www.cloudflare.com/role/FinancingArrangements2030ConvertibleSeniorNotesDetails">
        <link:definition>9955536 - Disclosure - Financing Arrangements - 2030 Convertible Senior Notes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangements2030CappedCallTransactionsDetails" roleURI="http://www.cloudflare.com/role/FinancingArrangements2030CappedCallTransactionsDetails">
        <link:definition>9955537 - Disclosure - Financing Arrangements - 2030 Capped Call Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangements2026ConvertibleSeniorNotesDetails" roleURI="http://www.cloudflare.com/role/FinancingArrangements2026ConvertibleSeniorNotesDetails">
        <link:definition>9955538 - Disclosure - Financing Arrangements - 2026 Convertible Senior Notes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangements2026CappedCallTransactionsDetails" roleURI="http://www.cloudflare.com/role/FinancingArrangements2026CappedCallTransactionsDetails">
        <link:definition>9955539 - Disclosure - Financing Arrangements - 2026 Capped Call Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangements2025ConvertibleSeniorNotesDetails" roleURI="http://www.cloudflare.com/role/FinancingArrangements2025ConvertibleSeniorNotesDetails">
        <link:definition>9955540 - Disclosure - Financing Arrangements - 2025 Convertible Senior Notes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangements2025CappedCallTransactionsDetails" roleURI="http://www.cloudflare.com/role/FinancingArrangements2025CappedCallTransactionsDetails">
        <link:definition>9955541 - Disclosure - Financing Arrangements - 2025 Capped Call Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangementsScheduleofNetCarryingAmountofNotesDetails" roleURI="http://www.cloudflare.com/role/FinancingArrangementsScheduleofNetCarryingAmountofNotesDetails">
        <link:definition>9955542 - Disclosure - Financing Arrangements - Schedule of Net Carrying Amount of Notes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangementsScheduleofInterestComponentsDetails" roleURI="http://www.cloudflare.com/role/FinancingArrangementsScheduleofInterestComponentsDetails">
        <link:definition>9955543 - Disclosure - Financing Arrangements - Schedule of Interest Components (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinancingArrangementsRevolvingCreditFacilityDetails" roleURI="http://www.cloudflare.com/role/FinancingArrangementsRevolvingCreditFacilityDetails">
        <link:definition>9955544 - Disclosure - Financing Arrangements - Revolving Credit Facility (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommonStockNarrativeDetails" roleURI="http://www.cloudflare.com/role/CommonStockNarrativeDetails">
        <link:definition>9955545 - Disclosure - Common Stock - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommonStockScheduleofCommonStockReservedforFutureIssuanceDetails" roleURI="http://www.cloudflare.com/role/CommonStockScheduleofCommonStockReservedforFutureIssuanceDetails">
        <link:definition>9955546 - Disclosure - Common Stock - Schedule of Common Stock Reserved for Future Issuance (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockbasedCompensationNarrativeDetails" roleURI="http://www.cloudflare.com/role/StockbasedCompensationNarrativeDetails">
        <link:definition>9955547 - Disclosure - Stock-based Compensation - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockbasedCompensationScheduleofAssumptionsUsedtoDeterminetheFairValueofStockOptionsGrantedDetails" roleURI="http://www.cloudflare.com/role/StockbasedCompensationScheduleofAssumptionsUsedtoDeterminetheFairValueofStockOptionsGrantedDetails">
        <link:definition>9955548 - Disclosure - Stock-based Compensation - Schedule of Assumptions Used to Determine the Fair Value of Stock Options Granted (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockbasedCompensationScheduleofStockbasedCompensationExpenseDetails" roleURI="http://www.cloudflare.com/role/StockbasedCompensationScheduleofStockbasedCompensationExpenseDetails">
        <link:definition>9955549 - Disclosure - Stock-based Compensation - Schedule of Stock-based Compensation Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetLossperShareAttributabletoCommonStockholdersScheduleofComputationofBasicandDilutedEarningsperShareAttributabletoCommonStockholdersDetails" roleURI="http://www.cloudflare.com/role/NetLossperShareAttributabletoCommonStockholdersScheduleofComputationofBasicandDilutedEarningsperShareAttributabletoCommonStockholdersDetails">
        <link:definition>9955550 - Disclosure - Net Loss per Share Attributable to Common Stockholders - Schedule of Computation of Basic and Diluted Earnings per Share Attributable to Common Stockholders (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetLossperShareAttributabletoCommonStockholdersScheduleofPotentialSharesofCommonStockExcludedfromComputationofBasicandDilutedNetLossperShareAttributabletoCommonStockholdersDetails" roleURI="http://www.cloudflare.com/role/NetLossperShareAttributabletoCommonStockholdersScheduleofPotentialSharesofCommonStockExcludedfromComputationofBasicandDilutedNetLossperShareAttributabletoCommonStockholdersDetails">
        <link:definition>9955551 - Disclosure - Net Loss per Share Attributable to Common Stockholders - Schedule of Potential Shares of Common Stock Excluded from Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDetails" roleURI="http://www.cloudflare.com/role/IncomeTaxesDetails">
        <link:definition>9955552 - Disclosure - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessCombinationsNarrativeDetails" roleURI="http://www.cloudflare.com/role/BusinessCombinationsNarrativeDetails">
        <link:definition>9955553 - Disclosure - Business Combinations - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessCombinationsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails" roleURI="http://www.cloudflare.com/role/BusinessCombinationsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails">
        <link:definition>9955554 - Disclosure - Business Combinations - Schedule of Assets Acquired and Liabilities Assumed (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentandGeographicInformationNarrativeDetails" roleURI="http://www.cloudflare.com/role/SegmentandGeographicInformationNarrativeDetails">
        <link:definition>9955555 - Disclosure - Segment and Geographic Information - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentandGeographicInformationScheduleofReconciliationofConsolidatedRevenuetoNetIncomeDetails" roleURI="http://www.cloudflare.com/role/SegmentandGeographicInformationScheduleofReconciliationofConsolidatedRevenuetoNetIncomeDetails">
        <link:definition>9955556 - Disclosure - Segment and Geographic Information - Schedule of Reconciliation of Consolidated Revenue to Net Income (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentandGeographicInformationScheduleofPropertyandEquipmentNetbyGeographicAreaDetails" roleURI="http://www.cloudflare.com/role/SegmentandGeographicInformationScheduleofPropertyandEquipmentNetbyGeographicAreaDetails">
        <link:definition>9955557 - Disclosure - Segment and Geographic Information - Schedule of Property and Equipment, Net by Geographic Area (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="cloud_AccruedLiabilitiesAndOtherLiabilitiesCurrent" abstract="false" name="AccruedLiabilitiesAndOtherLiabilitiesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsEarlyExercisesInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsEarlyExercisesInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="cloud_APICShareBasedPaymentArrangementIncreaseForStockOptionsEarlyExercised" abstract="false" name="APICShareBasedPaymentArrangementIncreaseForStockOptionsEarlyExercised" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_StockIssuedDuringPeriodSharesConversionOfShares" abstract="false" name="StockIssuedDuringPeriodSharesConversionOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="cloud_StockIssuedDuringPeriodValueConversionOfShares" abstract="false" name="StockIssuedDuringPeriodValueConversionOfShares" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ReclassificationsOfEquityToDerivativeAsset" abstract="false" name="ReclassificationsOfEquityToDerivativeAsset" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_OperatingLeaseCostNoncash" abstract="false" name="OperatingLeaseCostNoncash" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_IncreaseDecreaseInCapitalizedContractCost" abstract="false" name="IncreaseDecreaseInCapitalizedContractCost" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_IncreaseDecreaseInOperatingLeaseLiabilities" abstract="false" name="IncreaseDecreaseInOperatingLeaseLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_PaymentsToAcquireBusinessAndAssetsNetOfCashAcquired" abstract="false" name="PaymentsToAcquireBusinessAndAssetsNetOfCashAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ProceedsFromSettlementOfCappedCall" abstract="false" name="ProceedsFromSettlementOfCappedCall" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_PaymentsForCappedCall" abstract="false" name="PaymentsForCappedCall" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_PaymentsOfRevolvingCreditFacilityIssuanceCosts" abstract="false" name="PaymentsOfRevolvingCreditFacilityIssuanceCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ProceedsFromStockOptionsExercisedEarly" abstract="false" name="ProceedsFromStockOptionsExercisedEarly" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_CashPaidForOperatingLeaseLiabilities" abstract="false" name="CashPaidForOperatingLeaseLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ShareBasedPaymentArrangementVestingOfEarlyExercisedStockOptions" abstract="false" name="ShareBasedPaymentArrangementVestingOfEarlyExercisedStockOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_BusinessCombinationAndAssetAcquisitionIndemnityHoldbackConsideration" abstract="false" name="BusinessCombinationAndAssetAcquisitionIndemnityHoldbackConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_SupplementalNoncashInvestingAndFinancingItemsMaturityOfMarketableSecuritiesInOtherCurrentAssets" abstract="false" name="SupplementalNoncashInvestingAndFinancingItemsMaturityOfMarketableSecuritiesInOtherCurrentAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ScheduleOfInterestExpenseDebtInstrumentsTableTextBlock" abstract="false" name="ScheduleOfInterestExpenseDebtInstrumentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cloud_ScheduleOfCommonStockReservedForFutureIssuanceTableTextBlock" abstract="false" name="ScheduleOfCommonStockReservedForFutureIssuanceTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cloud_OtherGeographicalRegionsMember" abstract="true" name="OtherGeographicalRegionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_SalesChannelConcentrationRiskMember" abstract="true" name="SalesChannelConcentrationRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_CapitalizedContractCostRollForward" abstract="true" name="CapitalizedContractCostRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cloud_CapitalizedContractCostAdditions" abstract="false" name="CapitalizedContractCostAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_DebtSecuritiesAvailableForSaleCurrentMember" abstract="true" name="DebtSecuritiesAvailableForSaleCurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_RestrictedCashMember" abstract="true" name="RestrictedCashMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax" abstract="false" name="CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax" abstract="false" name="CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAmortizedCost" abstract="false" name="CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAmortizedCost" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax" abstract="false" name="CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTax" abstract="false" name="CashAndCashEquivalentsAndDebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTax" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_CashAndCashEquivalentsAndDebtSecuritiesAvailableForSale" abstract="false" name="CashAndCashEquivalentsAndDebtSecuritiesAvailableForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_SeniorConvertibleNotesDue2026Member" abstract="true" name="SeniorConvertibleNotesDue2026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_SeniorConvertibleNotesDue2030Member" abstract="true" name="SeniorConvertibleNotesDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfterOneYearAmortizedCost" abstract="false" name="DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfterOneYearAmortizedCost" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ProvisionForDoubtfulAccountsExcludingPayAsYouGoCustomers" abstract="false" name="ProvisionForDoubtfulAccountsExcludingPayAsYouGoCustomers" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_CoLocationAssetLeaseMember" abstract="true" name="CoLocationAssetLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ScenarioOneMember" abstract="true" name="ScenarioOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_ScenarioTwoMember" abstract="true" name="ScenarioTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_DebtInstrumentCovenantMinimumRedeemableFaceAmount" abstract="false" name="DebtInstrumentCovenantMinimumRedeemableFaceAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_CappedCallsMember" abstract="true" name="CappedCallsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_CappedCallInitialCapPrice" abstract="false" name="CappedCallInitialCapPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="cloud_SharesCoveredByCappedCalls" abstract="false" name="SharesCoveredByCappedCalls" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="cloud_AdjustmentsToAdditionalPaidInCapitalPurchasesOfCappedCallsRelatedToConvertibleDebt" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalPurchasesOfCappedCallsRelatedToConvertibleDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_SeniorConvertibleNotesDue2025Member" abstract="true" name="SeniorConvertibleNotesDue2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_ExchangeEventAxis" abstract="true" name="ExchangeEventAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cloud_ExchangeEventDomain" abstract="true" name="ExchangeEventDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_CertainHoldersConversionMember" abstract="true" name="CertainHoldersConversionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_VariableRateComponentAxis" abstract="true" name="VariableRateComponentAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cloud_VariableRateComponentDomain" abstract="true" name="VariableRateComponentDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_VariableRateComponentOneMember" abstract="true" name="VariableRateComponentOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_VariableRateComponentTwoMember" abstract="true" name="VariableRateComponentTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_LineofCreditFacilityAccordionFeatureIncreaseLimit" abstract="false" name="LineofCreditFacilityAccordionFeatureIncreaseLimit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_DebtInstrumentCovenantRepaymentAccelerationPeriod" abstract="false" name="DebtInstrumentCovenantRepaymentAccelerationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cloud_DebtInstrumentCovenantPercentOfUnrestrictedCashAndAvailableBorrowingsToPrincipalOutstandingMaximum" abstract="false" name="DebtInstrumentCovenantPercentOfUnrestrictedCashAndAvailableBorrowingsToPrincipalOutstandingMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cloud_CommonStockVotingRightsNumberOfVotesForEachShare" abstract="false" name="CommonStockVotingRightsNumberOfVotesForEachShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cloud_RestrictedStockUnitsAndPerformanceStockUnitsMember" abstract="true" name="RestrictedStockUnitsAndPerformanceStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_EquityIncentivePlan2019Member" abstract="true" name="EquityIncentivePlan2019Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_OtherKeyEmployeesMember" abstract="true" name="OtherKeyEmployeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_StockOptionsWithMarketConditionsMember" abstract="true" name="StockOptionsWithMarketConditionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_OtherPerformanceAwardsMember" abstract="true" name="OtherPerformanceAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_StockOptionsWithMarketOrFinancialPerformanceConditionsMember" abstract="true" name="StockOptionsWithMarketOrFinancialPerformanceConditionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_TwoThousandAndNineteenEmployeeStockPurchasePlanMember" abstract="true" name="TwoThousandAndNineteenEmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_KiveraMember" abstract="true" name="KiveraMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_BusinessAcquisitionRetainingPercentage" abstract="false" name="BusinessAcquisitionRetainingPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cloud_BusinessCombinationContingentConsiderationLiabilityPeriod" abstract="false" name="BusinessCombinationContingentConsiderationLiabilityPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cloud_BusinessAcquisitionRemainingRetainingPercentage" abstract="false" name="BusinessAcquisitionRemainingRetainingPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cloud_BusinessCombinationContingentConsiderationRemainingLiabilityPeriod" abstract="false" name="BusinessCombinationContingentConsiderationRemainingLiabilityPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cloud_BusinessCombinationContingentConsiderationAdjustmentLiability" abstract="false" name="BusinessCombinationContingentConsiderationAdjustmentLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_BusinessCombinationContingentConsiderationAdjustmentLiabilityPeriod" abstract="false" name="BusinessCombinationContingentConsiderationAdjustmentLiabilityPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cloud_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ReportableSegmentMember" abstract="true" name="ReportableSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_OperatingExpensesAdjustmentsAbstract" abstract="true" name="OperatingExpensesAdjustmentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cloud_CostOfRevenueAdjusted" abstract="false" name="CostOfRevenueAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_SalesAndMarketingExpenseAdjusted" abstract="false" name="SalesAndMarketingExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_ResearchAndDevelopmentExpenseAdjusted" abstract="false" name="ResearchAndDevelopmentExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_GeneralAndAdministrativeExpenseAdjusted" abstract="false" name="GeneralAndAdministrativeExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cloud_JohnGrahamCummingMember" abstract="true" name="JohnGrahamCummingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cloud_MarkHawkinsMember" abstract="true" name="MarkHawkinsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
