<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<xsd:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://8x8.com/20190331" xmlns:eght="http://8x8.com/20190331" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import namespace="http://fasb.org/srt/2018-01-31" schemaLocation="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-roles-2018-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-types/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-types-2018-01-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2017-01-31" schemaLocation="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/currency/2017-01-31" schemaLocation="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2018-01-31" schemaLocation="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/exch/2018-01-31" schemaLocation="https://xbrl.sec.gov/exch/2018/exch-2018-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/naics/2017-01-31" schemaLocation="http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2018-01-31" schemaLocation="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="eght-20190331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="eght-20190331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="eght-20190331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="eght-20190331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple" />
      <link:roleType id="Acquisitions" roleURI="http://8x8.com/role/Acquisitions">
        <link:definition>2112100 - Disclosure - ACQUISITIONS</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="AcquisitionsDetails" roleURI="http://8x8.com/role/AcquisitionsDetails">
        <link:definition>2412401 - Disclosure - ACQUISITIONS (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="CommitmentsAndContingencies" roleURI="http://8x8.com/role/CommitmentsAndContingencies">
        <link:definition>2106100 - 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="CommitmentsAndContingenciesCapitalLeasesDetails" roleURI="http://8x8.com/role/CommitmentsAndContingenciesCapitalLeasesDetails">
        <link:definition>2406404 - Disclosure - COMMITMENTS AND CONTINGENCIES - Capital Leases (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="CommitmentsAndContingenciesNarrativeDetails" roleURI="http://8x8.com/role/CommitmentsAndContingenciesNarrativeDetails">
        <link:definition>2406402 - Disclosure - COMMITMENTS AND CONTINGENCIES - 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="CommitmentsAndContingenciesOperatingLeasesDetails" roleURI="http://8x8.com/role/CommitmentsAndContingenciesOperatingLeasesDetails">
        <link:definition>2406403 - Disclosure - COMMITMENTS AND CONTINGENCIES - Operating Leases (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="CommitmentsAndContingenciesTables" roleURI="http://8x8.com/role/CommitmentsAndContingenciesTables">
        <link:definition>2306301 - Disclosure - COMMITMENTS AND CONTINGENCIES (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="CompanyAndSignificantAccountingPolicies" roleURI="http://8x8.com/role/CompanyAndSignificantAccountingPolicies">
        <link:definition>2101100 - Disclosure - THE COMPANY AND 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="CompanyAndSignificantAccountingPoliciesAdoptionImpactOfAsc606Details" roleURI="http://8x8.com/role/CompanyAndSignificantAccountingPoliciesAdoptionImpactOfAsc606Details">
        <link:definition>2401404 - Disclosure - THE COMPANY AND SIGNIFICANT ACCOUNTING POLICIES - Adoption Impact of ASC 606 (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="CompanyAndSignificantAccountingPoliciesNarrativeDetails" roleURI="http://8x8.com/role/CompanyAndSignificantAccountingPoliciesNarrativeDetails">
        <link:definition>2401403 - Disclosure - THE COMPANY AND SIGNIFICANT ACCOUNTING POLICIES - 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="CompanyAndSignificantAccountingPoliciesPolicies" roleURI="http://8x8.com/role/CompanyAndSignificantAccountingPoliciesPolicies">
        <link:definition>2201201 - Disclosure - THE COMPANY AND 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="CompanyAndSignificantAccountingPoliciesTables" roleURI="http://8x8.com/role/CompanyAndSignificantAccountingPoliciesTables">
        <link:definition>2301302 - Disclosure - THE COMPANY AND SIGNIFICANT ACCOUNTING POLICIES (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="ConsolidatedBalanceSheets" roleURI="http://8x8.com/role/ConsolidatedBalanceSheets">
        <link:definition>1001000 - Statement - 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="ConsolidatedBalanceSheetsParenthetical" roleURI="http://8x8.com/role/ConsolidatedBalanceSheetsParenthetical">
        <link:definition>1001501 - Statement - 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="ConsolidatedStatementsOfCashFlows" roleURI="http://8x8.com/role/ConsolidatedStatementsOfCashFlows">
        <link:definition>1005000 - Statement - 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="ConsolidatedStatementsOfComprehensiveIncomeLoss" roleURI="http://8x8.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss">
        <link:definition>1003000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (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="ConsolidatedStatementsOfOperations" roleURI="http://8x8.com/role/ConsolidatedStatementsOfOperations">
        <link:definition>1002000 - Statement - 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="ConsolidatedStatementsOfStockholdersEquity" roleURI="http://8x8.com/role/ConsolidatedStatementsOfStockholdersEquity">
        <link:definition>1004000 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' 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="ConvertibleSeniorNotesAndCappedCall" roleURI="http://8x8.com/role/ConvertibleSeniorNotesAndCappedCall">
        <link:definition>2107100 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALL</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="ConvertibleSeniorNotesAndCappedCallCarryingAmountOfEquityComponentDetails" roleURI="http://8x8.com/role/ConvertibleSeniorNotesAndCappedCallCarryingAmountOfEquityComponentDetails">
        <link:definition>2407404 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALL - Carrying Amount of the Equity Component (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="ConvertibleSeniorNotesAndCappedCallCarryingAmountOfLiabilityComponentDetails" roleURI="http://8x8.com/role/ConvertibleSeniorNotesAndCappedCallCarryingAmountOfLiabilityComponentDetails">
        <link:definition>2407403 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALL - Carrying Amount of the Liability Component (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="ConvertibleSeniorNotesAndCappedCallInterestExpenseDetails" roleURI="http://8x8.com/role/ConvertibleSeniorNotesAndCappedCallInterestExpenseDetails">
        <link:definition>2407405 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALL - Interest 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="ConvertibleSeniorNotesAndCappedCallNarrativeDetails" roleURI="http://8x8.com/role/ConvertibleSeniorNotesAndCappedCallNarrativeDetails">
        <link:definition>2407402 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALL - 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="ConvertibleSeniorNotesAndCappedCallNetImpactToStockholdersEquityDetails" roleURI="http://8x8.com/role/ConvertibleSeniorNotesAndCappedCallNetImpactToStockholdersEquityDetails">
        <link:definition>2407406 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALL - Net Impact to Stockholders' Equity (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="ConvertibleSeniorNotesAndCappedCallTables" roleURI="http://8x8.com/role/ConvertibleSeniorNotesAndCappedCallTables">
        <link:definition>2307301 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALL (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="DocumentAndEntityInformation" roleURI="http://8x8.com/role/DocumentAndEntityInformation">
        <link:definition>0001000 - Document - Document and Entity 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="FairValueMeasurements" roleURI="http://8x8.com/role/FairValueMeasurements">
        <link:definition>2103100 - 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="FairValueMeasurementsCashCashEquivalentsAndInvestmentsWithHierarchyDetails" roleURI="http://8x8.com/role/FairValueMeasurementsCashCashEquivalentsAndInvestmentsWithHierarchyDetails">
        <link:definition>2403402 - Disclosure - FAIR VALUE MEASUREMENTS - Cash, Cash Equivalents and Investments with Hierarchy (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="FairValueMeasurementsCashCashEquivalentsAndInvestmentsWithHierarchyDetailsCalc2" roleURI="http://8x8.com/role/FairValueMeasurementsCashCashEquivalentsAndInvestmentsWithHierarchyDetailsCalc2">
        <link:definition>2403402 - Disclosure - FAIR VALUE MEASUREMENTS - Cash, Cash Equivalents and Investments with Hierarchy (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="FairValueMeasurementsContractualMaturityOfInvestmentsDetails" roleURI="http://8x8.com/role/FairValueMeasurementsContractualMaturityOfInvestmentsDetails">
        <link:definition>2403404 - Disclosure - FAIR VALUE MEASUREMENTS - Contractual Maturity of Investments (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://8x8.com/role/FairValueMeasurementsNarrativeDetails">
        <link:definition>2403403 - 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="FairValueMeasurementsTables" roleURI="http://8x8.com/role/FairValueMeasurementsTables">
        <link:definition>2303301 - 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="GeographicalInformation" roleURI="http://8x8.com/role/GeographicalInformation">
        <link:definition>2111100 - Disclosure - GEOGRAPHICAL 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="GeographicalInformationDetails" roleURI="http://8x8.com/role/GeographicalInformationDetails">
        <link:definition>2411402 - Disclosure - GEOGRAPHICAL INFORMATION (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="GeographicalInformationTables" roleURI="http://8x8.com/role/GeographicalInformationTables">
        <link:definition>2311301 - Disclosure - GEOGRAPHICAL 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="IncomeTaxes" roleURI="http://8x8.com/role/IncomeTaxes">
        <link:definition>2109100 - 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="IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails" roleURI="http://8x8.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails">
        <link:definition>2409403 - Disclosure - INCOME TAXES - Deferred Tax Assets and Liabilities (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="IncomeTaxesIncomeTaxProvisionDetails" roleURI="http://8x8.com/role/IncomeTaxesIncomeTaxProvisionDetails">
        <link:definition>2409402 - Disclosure - INCOME TAXES - Income Tax Provision (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="IncomeTaxesNarrativeDetails" roleURI="http://8x8.com/role/IncomeTaxesNarrativeDetails">
        <link:definition>2409406 - Disclosure - INCOME TAXES - 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="IncomeTaxesReconciliationOfTaxesProvidedToFederalStatutoryRateDetails" roleURI="http://8x8.com/role/IncomeTaxesReconciliationOfTaxesProvidedToFederalStatutoryRateDetails">
        <link:definition>2409404 - Disclosure - INCOME TAXES - Reconciliation of Taxes Provided to Federal Statutory Rate (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="IncomeTaxesTables" roleURI="http://8x8.com/role/IncomeTaxesTables">
        <link:definition>2309301 - Disclosure - INCOME TAXES (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="IncomeTaxesUnrecognizedTaxBenefitsDetails" roleURI="http://8x8.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails">
        <link:definition>2409405 - Disclosure - INCOME TAXES - Unrecognized Tax Benefits (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="IntangibleAssetsGoodwillAndOtherAssets" roleURI="http://8x8.com/role/IntangibleAssetsGoodwillAndOtherAssets">
        <link:definition>2105100 - Disclosure - INTANGIBLE ASSETS, GOODWILL AND OTHER ASSETS</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="IntangibleAssetsGoodwillAndOtherAssetsChangesInCarryingAmountOfGoodwillByLocationDetails" roleURI="http://8x8.com/role/IntangibleAssetsGoodwillAndOtherAssetsChangesInCarryingAmountOfGoodwillByLocationDetails">
        <link:definition>2405405 - Disclosure - INTANGIBLE ASSETS, GOODWILL AND OTHER ASSETS - Changes in Carrying Amount of Goodwill by Location (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="IntangibleAssetsGoodwillAndOtherAssetsNarrativeDetails" roleURI="http://8x8.com/role/IntangibleAssetsGoodwillAndOtherAssetsNarrativeDetails">
        <link:definition>2405404 - Disclosure - INTANGIBLE ASSETS, GOODWILL AND OTHER ASSETS - 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="IntangibleAssetsGoodwillAndOtherAssetsScheduleOfFutureAmortizationOfIntangiblesDetails" roleURI="http://8x8.com/role/IntangibleAssetsGoodwillAndOtherAssetsScheduleOfFutureAmortizationOfIntangiblesDetails">
        <link:definition>2405403 - Disclosure - INTANGIBLE ASSETS, GOODWILL AND OTHER ASSETS - Schedule Of Future Amortization Of Intangibles (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="IntangibleAssetsGoodwillAndOtherAssetsScheduleOfIntangiblesDetails" roleURI="http://8x8.com/role/IntangibleAssetsGoodwillAndOtherAssetsScheduleOfIntangiblesDetails">
        <link:definition>2405402 - Disclosure - INTANGIBLE ASSETS, GOODWILL AND OTHER ASSETS - Schedule Of Intangibles (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="IntangibleAssetsGoodwillAndOtherAssetsTables" roleURI="http://8x8.com/role/IntangibleAssetsGoodwillAndOtherAssetsTables">
        <link:definition>2305301 - Disclosure - INTANGIBLE ASSETS, GOODWILL AND OTHER ASSETS (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="NetIncomeLossPerShare" roleURI="http://8x8.com/role/NetIncomeLossPerShare">
        <link:definition>2110100 - Disclosure - NET INCOME (LOSS) PER SHARE</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="NetIncomeLossPerShareBasicAndDilutedNetIncomeLossPerShareDetails" roleURI="http://8x8.com/role/NetIncomeLossPerShareBasicAndDilutedNetIncomeLossPerShareDetails">
        <link:definition>2410402 - Disclosure - NET INCOME (LOSS) PER SHARE - Basic and Diluted Net Income (Loss) Per Share (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="NetIncomeLossPerShareScheduleOfAntidilutiveAwardsDetails" roleURI="http://8x8.com/role/NetIncomeLossPerShareScheduleOfAntidilutiveAwardsDetails">
        <link:definition>2410403 - Disclosure - NET INCOME (LOSS) PER SHARE - Schedule of Antidilutive Awards (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="NetIncomeLossPerShareTables" roleURI="http://8x8.com/role/NetIncomeLossPerShareTables">
        <link:definition>2310301 - Disclosure - NET INCOME (LOSS) PER SHARE (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="PropertyAndEquipment" roleURI="http://8x8.com/role/PropertyAndEquipment">
        <link:definition>2104100 - Disclosure - PROPERTY AND EQUIPMENT</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="PropertyAndEquipmentDetails" roleURI="http://8x8.com/role/PropertyAndEquipmentDetails">
        <link:definition>2404402 - Disclosure - PROPERTY AND EQUIPMENT (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="PropertyAndEquipmentTables" roleURI="http://8x8.com/role/PropertyAndEquipmentTables">
        <link:definition>2304301 - Disclosure - PROPERTY AND EQUIPMENT (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="Reclassifications" roleURI="http://8x8.com/role/Reclassifications">
        <link:definition>2114100 - Disclosure - RECLASSIFICATIONS</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="ReclassificationsDetails" roleURI="http://8x8.com/role/ReclassificationsDetails">
        <link:definition>2414402 - Disclosure - RECLASSIFICATIONS (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="ReclassificationsTables" roleURI="http://8x8.com/role/ReclassificationsTables">
        <link:definition>2314301 - Disclosure - RECLASSIFICATIONS (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="RevenueRecognition" roleURI="http://8x8.com/role/RevenueRecognition">
        <link:definition>2102100 - Disclosure - REVENUE RECOGNITION</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="RevenueRecognitionChangesInContractBalancesDetails" roleURI="http://8x8.com/role/RevenueRecognitionChangesInContractBalancesDetails">
        <link:definition>2402404 - Disclosure - REVENUE RECOGNITION - Changes in Contract Balances (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="RevenueRecognitionContractBalancesDetails" roleURI="http://8x8.com/role/RevenueRecognitionContractBalancesDetails">
        <link:definition>2402403 - Disclosure - REVENUE RECOGNITION - Contract Balances (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="RevenueRecognitionNarrativeDetails" roleURI="http://8x8.com/role/RevenueRecognitionNarrativeDetails">
        <link:definition>2402402 - Disclosure - REVENUE RECOGNITION - 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="RevenueRecognitionTables" roleURI="http://8x8.com/role/RevenueRecognitionTables">
        <link:definition>2302301 - Disclosure - REVENUE RECOGNITION (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="ScheduleIiDetails" roleURI="http://8x8.com/role/ScheduleIiDetails">
        <link:definition>2416401 - Disclosure - SCHEDULE II (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="ScheudleIi" roleURI="http://8x8.com/role/ScheudleIi">
        <link:definition>2116100 - Disclosure - SCHEUDLE II</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="SelectedQuarterlyFinancialDataUnaudited" roleURI="http://8x8.com/role/SelectedQuarterlyFinancialDataUnaudited">
        <link:definition>2115100 - Disclosure - SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)</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="SelectedQuarterlyFinancialDataUnauditedDetails" roleURI="http://8x8.com/role/SelectedQuarterlyFinancialDataUnauditedDetails">
        <link:definition>2415402 - Disclosure - SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (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="SelectedQuarterlyFinancialDataUnauditedTables" roleURI="http://8x8.com/role/SelectedQuarterlyFinancialDataUnauditedTables">
        <link:definition>2315301 - Disclosure - SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (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="StockholdersEquity" roleURI="http://8x8.com/role/StockholdersEquity">
        <link:definition>2108100 - Disclosure - STOCKHOLDERS' 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="StockholdersEquityAssumptionsUsedInBlackScholesModelDetails" roleURI="http://8x8.com/role/StockholdersEquityAssumptionsUsedInBlackScholesModelDetails">
        <link:definition>2408406 - Disclosure - STOCKHOLDERS' EQUITY - Assumptions Used In Black-Scholes Model (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="StockholdersEquityNarrativeDetails" roleURI="http://8x8.com/role/StockholdersEquityNarrativeDetails">
        <link:definition>2408402 - Disclosure - STOCKHOLDERS' EQUITY - 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="StockholdersEquityOptionActivityDetails" roleURI="http://8x8.com/role/StockholdersEquityOptionActivityDetails">
        <link:definition>2408404 - Disclosure - STOCKHOLDERS' EQUITY - Option Activity (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="StockholdersEquityStockBasedCompensationExpenseByStatementOfOperationsDetails" roleURI="http://8x8.com/role/StockholdersEquityStockBasedCompensationExpenseByStatementOfOperationsDetails">
        <link:definition>2408403 - Disclosure - STOCKHOLDERS' EQUITY - Stock-Based Compensation Expense By Statement Of Operations (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="StockholdersEquityStockPurchaseRightAndRestrictedStockUnitActivityDetails" roleURI="http://8x8.com/role/StockholdersEquityStockPurchaseRightAndRestrictedStockUnitActivityDetails">
        <link:definition>2408405 - Disclosure - STOCKHOLDERS' EQUITY - Stock Purchase Right and Restricted Stock Unit Activity (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="StockholdersEquityTables" roleURI="http://8x8.com/role/StockholdersEquityTables">
        <link:definition>2308301 - Disclosure - STOCKHOLDERS' EQUITY (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="SubsequentEvents" roleURI="http://8x8.com/role/SubsequentEvents">
        <link:definition>2113100 - Disclosure - SUBSEQUENT EVENTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element abstract="true" id="eght_A2006PlanMember" name="A2006PlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_A2012PlanMember" name="A2012PlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_A2013PlanMember" name="A2013PlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_A2015RepurchaseProgramMember" name="A2015RepurchaseProgramMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_A2017PlanMember" name="A2017PlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_A2017RepurchasePlanMember" name="A2017RepurchasePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_AddBackTaxBenefitFromStockbasedCompensation" name="AddBackTaxBenefitFromStockbasedCompensation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="eght_CashCashEquivalentsandDebtSecuritiesAvailableforsale" name="CashCashEquivalentsandDebtSecuritiesAvailableforsale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="eght_CashCashEquivalentsandDebtSecuritiesAvailableforsaleAmortizedCost" name="CashCashEquivalentsandDebtSecuritiesAvailableforsaleAmortizedCost" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="eght_CommonStockAdditionalCapitalSharesReservedforFutureIssuance" name="CommonStockAdditionalCapitalSharesReservedforFutureIssuance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="eght_ConvertibleSeniorNotesEquityComponentMember" name="ConvertibleSeniorNotesEquityComponentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_ConvertibleSeniorNotesMember" name="ConvertibleSeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_DXIMember" name="DXIMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_DebtInstrumentConvertibleGrossAmountOfEquityComponent" name="DebtInstrumentConvertibleGrossAmountOfEquityComponent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="eght_DebtInstrumentConvertibleMeasurementPeriod" name="DebtInstrumentConvertibleMeasurementPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="eght_DebtInstrumentConvertibleThresholdConsecutiveTradingDaysPrecedingMeasurementPeriod" name="DebtInstrumentConvertibleThresholdConsecutiveTradingDaysPrecedingMeasurementPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="eght_DebtInstrumentConvertibleThresholdPercentageofSalesPricePerShare" name="DebtInstrumentConvertibleThresholdPercentageofSalesPricePerShare" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="eght_DebtSecuritiesAvailableforsaleDueAfterOneYear" name="DebtSecuritiesAvailableforsaleDueAfterOneYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="eght_DeferredIncomeTaxExpenseBenefit1" name="DeferredIncomeTaxExpenseBenefit1" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_EffectiveIncomeTaxRateReconciliationAcquisitionCostsAmount" name="EffectiveIncomeTaxRateReconciliationAcquisitionCostsAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="eght_EmployeeStockPurchasePlanDurationOfOfferingPeriod" name="EmployeeStockPurchasePlanDurationOfOfferingPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_EmployeeStockPurchasePlanDurationOfPurchasePeriod" name="EmployeeStockPurchasePlanDurationOfPurchasePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_EmployeeStockPurchasePlanMaximumContributionofEmployeesBaseCompensation" name="EmployeeStockPurchasePlanMaximumContributionofEmployeesBaseCompensation" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="eght_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_EmployeeStockPurchasePlanPercentageOfMarketValuePriceOfCommonStock" name="EmployeeStockPurchasePlanPercentageOfMarketValuePriceOfCommonStock" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="eght_EmployeeStockPurchasePlanTermofExtension" name="EmployeeStockPurchasePlanTermofExtension" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_GainOnEscrowSettlement" name="GainOnEscrowSettlement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_HeadquartersFacilitySanJoseCaliforniaMember" name="HeadquartersFacilitySanJoseCaliforniaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_IncreaseDecreaseinContractwithCustomerLiability1" name="IncreaseDecreaseinContractwithCustomerLiability1" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_JitsiMember" name="JitsiMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_LeChatIncMember" name="LeChatIncMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_LeaseArea" name="LeaseArea" nillable="true" substitutionGroup="xbrli:item" type="num:areaItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_LeaseNonCashLeaseExpense" name="LeaseNonCashLeaseExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="eght_MarianaIQIncMember" name="MarianaIQIncMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_OptionIndexedToIssuersEquityCapPrice" name="OptionIndexedToIssuersEquityCapPrice" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_PaymentsForCappedCall" name="PaymentsForCappedCall" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="eght_RevenueSubscriptionTerm" name="RevenueSubscriptionTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_SalesTaxMember" name="SalesTaxMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesIssuedPerTranchePercentageOfTarget" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesIssuedPerTranchePercentageOfTarget" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumCommonStockPerformancePercentage" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumCommonStockPerformancePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="eght_ShareBasedCompensationArrangementBySharebasedPaymentAwardChangeInSharesEarnedPerOnePercentChangeInTotalShareholderReturnsPercentage" name="ShareBasedCompensationArrangementBySharebasedPaymentAwardChangeInSharesEarnedPerOnePercentChangeInTotalShareholderReturnsPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_SoftwareLicenseMember" name="SoftwareLicenseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_StateAndLocalTaxesAndSurchargesMember" name="StateAndLocalTaxesAndSurchargesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_StockPurchaseRightMember" name="StockPurchaseRightMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_TaxYear2019Member" name="TaxYear2019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_TaxYearsPriorTo2019Member" name="TaxYearsPriorTo2019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_ThirdPartyCustomerSupportCommitmentsMember" name="ThirdPartyCustomerSupportCommitmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="eght_ThirdPartyNetworkServiceProviderCommitmentsMember" name="ThirdPartyNetworkServiceProviderCommitmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
