UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C FORM 8-K

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1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2017 Twilio Inc. (Exactnameofregistrantasspecifiedinitscharter) Delaware (Stateorotherjurisdiction ofincorporation) (Commission FileNumber) (IRSEmployer IdentificationNo.) 375 Beale Street, Suite 300 San Francisco, California (Addressofprincipalexecutiveoffices)(ZipCode) (415) (Registrant stelephonenumber,includingareacode) Not applicable (Formernameorformeraddress,ifchangedsincelastreport) ChecktheappropriateboxbelowiftheForm8-Kfilingisintendedtosimultaneouslysatisfythefilingobligationoftheregistrantunderanyofthefollowing provisions: WrittencommunicationspursuanttoRule425undertheSecuritiesAct(17CFR ) SolicitingmaterialpursuanttoRule14a-12undertheExchangeAct(17CFR240.14a-12) Pre-commencementcommunicationspursuanttoRule14d-2(b)undertheExchangeAct(17CFR240.14d-2(b)) Pre-commencementcommunicationspursuanttoRule13e-4(c)undertheExchangeAct(17CFR240.13e-4(c)) IndicatebycheckmarkwhethertheregistrantisanemerginggrowthcompanyasdefinedinRule405oftheSecuritiesActof1933( ofthischapter)or Rule12b-2oftheSecuritiesExchangeActof1934( b-2ofthischapter). Emerginggrowthcompany Ifanemerginggrowthcompany,indicatebycheckmarkiftheregistranthaselectednottousetheextendedtransitionperiodforcomplyingwithanynewor revisedfinancialaccountingstandardsprovidedpursuanttosection13(a)oftheexchangeact.

2 Item 2.02 Results of Operations and Financial Condition. OnAugust7,2017,TwilioInc.(the Company )issuedapressreleaseannouncingitsfinancialresultsforthequarterlyperiodendedjune30,2017.acopy ofthepressreleaseisfurnishedherewithasexhibit99.1. TheinformationfurnishedunderthisItem2.02andintheaccompanyingExhibit99.1shallnotbedeemed filed forpurposesofsection18ofthesecurities ExchangeActof1934,asamended(the ExchangeAct ),orincorporatedbyreferenceinanyfilingunderthesecuritiesactof1933,asamended,ortheexchange Actregardlessofanygeneralincorporationlanguageinsuchfiling,unlessexpresslyincorporatedbyspecificreferenceinsuchfiling. Item 9.01 Financial Statements and Exhibits. (d)exhibits. Exhibit No. Description 99.1 PressreleaseissuedbyTwilioInc.datedAugust7,2017.

3 SIGNATURES PursuanttotherequirementsoftheSecuritiesExchangeActof1934,theregistranthasdulycausedthisreporttobesignedonitsbehalfbytheundersigned hereuntodulyauthorized. TWILIO INC. Date:August7,2017 By: /s/leekirkpatrick Name: Title: LeeKirkpatrick ChiefFinancialOfficer

4 EXHIBIT INDEX Exhibit No. Description 99.1 PressreleaseissuedbyTwilioInc.datedAugust7,2017.

5 Exhibit 99.1 Twilio Announces Second Quarter 2017 Results Q2TotalRevenueof$95.9million,up49%year-over-year Q2BaseRevenueof$87.6million,up55%year-over-year Q2Dollar-BasedNetExpansionRateof131% SANFRANCISCO--(BUSINESSWIRE)--August7,2017--TwilioInc.(NYSE:TWLO),theleadingCloudCommunicationsPlatformcompany,todayreported financialresultsforitssecondquarterendedjune30,2017. I mextremelyproudofwhatourteamwasabletodeliveratoursignalconferenceinq2.weannounced42newproductsaroundsignal-fromspeech recognitionandournewmachinelearning-poweredunderstandproduct,tothelaunchofanentirelynewlayerofsoftware-thetwilioengagementcloud, said JeffLawson,Twilio sco-founderandchiefexecutiveofficer. Onceagainthisquarter,wesawalargenumberofcompaniesacrossavarietyofindustriesplace theirtrustinourplatform. Second Quarter 2017 Financial Highlights Totalrevenueof$95.9millionforthesecondquarterof2017,up49%fromthesecondquarterof2016and10%sequentiallyfromthefirstquarterof2017. Baserevenueof$87.6millionforthesecondquarterof2017,up55%fromthesecondquarterof2016and9%sequentiallyfromthefirstquarterof2017. GAAPlossfromoperationsof$7.1millionforthesecondquarterof2017,comparedwithGAAPlossfromoperationsof$10.9millionforthesecond quarterof2016.non-gaaplossfromoperationsof$4.7millionforthesecondquarterof2017,comparedwithnon-gaaplossfromoperationsof$5.7 millionforthesecondquarterof2016. GAAPnetlosspershareattributabletocommonstockholdersof$0.08basedon90.9millionweightedaveragesharesoutstandinginthesecondquarterof 2017,comparedwithGAAPnetlosspershareattributabletocommonstockholdersof$0.45basedon24.3millionweightedaveragesharesoutstandingin thesecondquarterof2016. Non-GAAPnetlosspershareattributabletocommonstockholdersof$0.05basedon90.9millionnon-GAAPweightedaveragesharesoutstandinginthe secondquarterof2017,comparedwithnon-gaapnetlosspershareattributabletocommonstockholdersof$0.08basedon72.8millionnon-gaap weightedaveragesharesoutstandinginthesecondquarterof2016.

6 Key Metrics and Recent Business Highlights Outlook 43,431ActiveCustomerAccountsasofJune30,2017,comparedto30,780ActiveCustomerAccountsasofJune30,2016. Dollar-BasedNetExpansionRatewas131%forthesecondquarterof2017,comparedto164%forthesecondquarterof2016. HeldourannualSignaluserconference,wherewegathereddevelopers,executives,andpartnersfromacrosstheglobetodiscusswhatispossibleby leveragingthepowerandfunctionalityofourplatform. IntroducedtheEngagementCloud,asetofdeclarativeAPIsdesignedtohelpourcustomersbuildbetterwaystoengagewiththeircustomers. AnnouncedProxy,anextgenerationAPIforbuildingprivateandmoderatedconversationswithcustomers. LaunchedthepublicBetaofSpeechRecognition,anewcomponentofourProgrammableVoiceAPIthatallowscustomerstoconvertspeechtotextand analyzeitsintent,alongwithapreviewofanewmachinelearningproductcalledunderstandthatwillallowourcustomerstocapturethemeaningbehind voice,chat,andsmstext,anddriveautomatedinteractionsbasedonthatmeaning. ReleasedthepublicBetaofFunctions,anewserverlessenvironmenttohelpcustomersmoreeasilybuild,run,andscalecommunicationsapplicationsusing thetwilioplatformbyautomaticallyhandlingtheprovisioningofthewebinfrastructurerequiredtoruntheirapplicationssecurely,andatglobalscale. WelcomedJeffEpsteintoourBoardofDirectors. TwilioisprovidingguidanceforthethirdquarterendingSeptember30,2017andfullyearendingDecember31,2017asfollows: Quarter ending September 30, 2017: TotalRevenue(millions) $ 91.0 to $ 93.0 BaseRevenue(millions) $ 86.5 to $ 87.5 Non-GAAPlossfromoperations(millions) $ 8.0 to $ 7.0 Non-GAAPnetlosspershare (0.08) to (0.07) Weightedaveragesharesoutstanding 92.5 Full year ending December 31, 2017: TotalRevenue(millions) $ to $ BaseRevenue(millions) $ to $ Non-GAAPlossfromoperations(millions) $ 23.0 to $ 21.0 Non-GAAPnetlosspershare (0.24) to (0.22) Non-GAAPweightedaveragesharesoutstanding 92.5

7 Conference Call Information Twiliowillhostaconferencecalltoday,August7,2017,todiscusssecondquarter2017financialresults,aswellasthethirdquarterandfullyear2017outlook,at 2p.m.PacificTime,5p.m.EasternTime.Alivewebcastoftheconferencecall,aswellasareplayofthecall,willbeavailableathttps://investors.twilio.com.The conferencecallcanalsobeaccessedbydialing(844) ,or+1(647) (outsidetheu.s.andcanada).theconferenceidis following thecompletionofthecallthrough11:59pmeasterntimeonaugust14,2017,areplaywillbeavailablebydialing(800) or+1(416) (outside theu.s.andcanada)andenteringpasscode twiliohasused,andintendstocontinuetouse,itsinvestorrelationswebsiteasameansofdisclosing materialnon-publicinformationandforcomplyingwithitsdisclosureobligationsunderregulationfd. About Twilio Inc. Twilio'smissionistofuelthefutureofcommunications.DevelopersandbusinessesuseTwiliotomakecommunicationsrelevantandcontextualbyembedding messaging,voice,andvideocapabilitiesdirectlyintotheirsoftwareapplications.foundedin2008,twiliohasover800employees,withheadquartersinsan FranciscoandotherofficesinBogotá,Dublin,HongKong,London,Madrid,Malmö,MountainView,Munich,NewYorkCity,SingaporeandTallinn. Forward-Looking Statements Thispressreleaseandtheaccompanyingconferencecallcontainsforward-lookingstatementswithinthemeaningofthefederalsecuritieslaws,whichstatements involvesubstantialrisksanduncertainties.forward-lookingstatementsgenerallyrelatetofutureeventsorourfuturefinancialoroperatingperformance.insome cases,youcanidentifyforward-lookingstatementsbecausetheycontainwordssuchas may, will, should, expects, plans, anticipates, could, intends, target, projects, contemplates, believes, estimates, predicts, potential or continue orthenegativeofthesewordsorothersimilarterms orexpressionsthatconcernourexpectations,strategy,plansorintentions.forward-lookingstatementscontainedinthispressreleaseinclude,butarenotlimitedto, statementsabout:twilio soutlookforthequarterendingseptember30,2017andfullyearendingdecember31,2017;andtwilio sexpectationsregardingits productsandsolutions.youshouldnotrelyuponforward-lookingstatementsaspredictionsoffutureevents. Theoutcomeoftheeventsdescribedintheseforward-lookingstatementsissubjecttoknownandunknownrisks,uncertainties,andotherfactorsthatmaycause Twilio sactualresults,performance,orachievementstodiffermateriallyfromthosedescribedintheforward-lookingstatements,including,amongotherthings: adversechangesingeneraleconomicormarketconditions;changesinthemarketforcommunications;twilio sabilitytoadaptitsproductstomeetevolving marketandcustomerdemandsandrapidtechnologicalchange;twilio sabilitytogeneratesufficientrevenuestoachieveorsustainprofitability;twilio sabilityto retaincustomersandattractnewcustomers;twilio slimitedoperatinghistory,whichmakesitdifficulttoevaluateitsprospectsandfutureoperatingresults; Twilio sabilitytoeffectivelymanageitsgrowth;andtwilio sabilitytocompeteeffectivelyinanintenselycompetitivemarket.

8 Theforward-lookingstatementscontainedinthispressreleasearealsosubjecttoadditionalrisks,uncertainties,andfactors,includingthosemorefullydescribedin Twilio smostrecentfilingswiththesecuritiesandexchangecommission,includingitsform10-qforthequarterendedmarch31,2017filedonmay10,2017. FurtherinformationonpotentialrisksthatcouldaffectactualresultswillbeincludedinthesubsequentperiodicandcurrentreportsandotherfilingsthatTwilio makeswiththesecuritiesandexchangecommissionfromtimetotime.moreover,twiliooperatesinaverycompetitiveandrapidlychangingenvironment,and newrisksanduncertaintiesmayemergethatcouldhaveanimpactontheforward-lookingstatementscontainedinthispressrelease. Forward-lookingstatementsrepresentTwilio smanagement sbeliefsandassumptionsonlyasofthedatesuchstatementsaremade.twilioundertakesno obligationtoupdateanyforward-lookingstatementsmadeinthispressreleasetoreflecteventsorcircumstancesafterthedateofthispressreleaseortoreflectnew informationortheoccurrenceofunanticipatedevents,exceptasrequiredbylaw. Use of Non-GAAP Financial Measures ToprovideinvestorsandotherswithadditionalinformationregardingTwilio sresults,thefollowingnon-gaapfinancialmeasuresaredisclosed:non-gaap grossprofitandgrossmargin,non-gaapoperatingexpenses,non-gaaplossfromoperationsandoperatingmargin,non-gaapnetlossattributabletocommon stockholders,non-gaapnetlosspershareattributabletocommonstockholders,basicanddiluted,andnon-gaapweighted-averagesharesusedtocomputenon- GAAPnetlosspershareattributabletocommonstockholders,basicanddiluted. Non-GAAPGrossProfitandNon-GAAPGrossMargin.Twiliodefinesnon-GAAPgrossprofitandnon-GAAPgrossmarginasGAAPgrossprofitandGAAP grossmargin,respectively,adjustedtoexcludestock-basedcompensationandamortizationofacquiredintangibles. Non-GAAPOperatingExpenses.Twiliodefinesnon-GAAPoperatingexpenses(includingcategoriesofoperatingexpenses)asGAAPoperatingexpenses(and categoriesofoperatingexpenses)adjustedtoexclude,asapplicable,stock-basedcompensation,amortizationofacquiredintangibles,acquisition-relatedexpenses, releaseoftaxliabilitiesuponobligationsettlementandestimaterevisions,andpayrolltaxesrelatedtostock-basedcompensation. Non-GAAPLossfromOperationsandNon-GAAPOperatingMargin.Twiliodefinesnon-GAAPlossfromoperationsandnon-GAAPoperatingmarginas GAAPlossfromoperationsandGAAPoperatingmargin,respectively,adjustedtoexcludestock-basedcompensation,amortizationofacquiredintangibles, acquisition-relatedexpenses,releaseoftaxliabilitiesuponobligationsettlementandestimaterevisions,andpayrolltaxesrelatedtostock-basedcompensation.

9 Non-GAAPNetLossAttributabletoCommonStockholdersandNon-GAAPNetLossPerShareAttributabletoCommonStockholders,BasicandDiluted. Twiliodefinesnon-GAAPnetlossattributabletocommonstockholdersandnon-GAAPnetlosspershareattributabletocommonstockholders,basicanddiluted, asgaapnetlossattributabletocommonstockholdersandgaapnetlosspershareattributabletocommonstockholders,basicanddiluted,respectively,adjusted toexcludestock-basedcompensation,amortizationofacquiredintangibles,acquisition-relatedexpenses,releaseoftaxliabilitiesuponobligationsettlementand estimaterevisions,andpayrolltaxesrelatedtostock-basedcompensation,and,inthecaseofnon-gaapnetlosspershareattributabletocommonstockholders, basicanddiluted,amountsattributabletoconvertiblepreferredstock. Inordertocalculatenon-GAAPnetlosspershareattributabletocommonstockholders,basicanddiluted,Twiliousesanon-GAAPweighted-averagesharecount. Twiliodefinesnon-GAAPweighted-averagesharesusedtocomputenon-GAAPnetlosspershareattributabletocommonstockholders,basicanddiluted,as GAAPweightedaveragesharesusedtocomputenetlosspershareattributabletocommonstockholders,basicanddiluted,adjustedtoreflecttheconversionof convertiblepreferredstockoutstandingintoclassbcommonstockasifithadoccurredatthebeginningoftheperiod. Twilio smanagementusestheforegoingnon-gaapfinancialinformation,collectively,toevaluateitsongoingoperationsandforinternalplanningandforecasting purposes.twilio smanagementbelievesthatnon-gaapfinancialinformation,whentakencollectively,maybehelpfultoinvestorsbecauseitprovides consistencyandcomparabilitywithpastfinancialperformance,facilitatesperiod-to-periodcomparisonsofresultsofoperations,andassistsincomparisonswith othercompanies,manyofwhichusesimilarnon-gaapfinancialinformationtosupplementtheirgaapresults.non-gaapfinancialinformationispresentedfor supplementalinformationalpurposesonly,andshouldnotbeconsideredasubstituteforfinancialinformationpresentedinaccordancewithgaap,andmaybe differentfromsimilarly-titlednon-gaapmeasuresusedbyothercompanies.whenevertwiliousesanon-gaapfinancialmeasure,areconciliationisprovidedto themostdirectlycomparablefinancialmeasurestatedinaccordancewithgaap.investorsareencouragedtoreviewtherelatedgaapfinancialmeasuresandthe reconciliationofthesenon-gaapfinancialmeasurestotheirmostdirectlycomparablegaapfinancialmeasures. WithrespecttoTwilio sguidanceasprovidedunder Outlook above,twiliohasnotreconcileditsexpectationsastonon-gaaplossfromoperationstogaap lossfromoperationsornon-gaapnetlosspersharetogaapnetlosspersharebecausestock-basedcompensationexpensecannotbereasonablycalculatedor predictedatthistime.accordingly,areconciliationisnotavailablewithoutunreasonableeffort.

10 Operating Metrics Twilioreviewsanumberofoperatingmetricstoevaluateitsbusiness,measureperformance,identifytrends,formulatebusinessplans,andmakestrategic decisions.theseincludethenumberofactivecustomeraccounts,baserevenue,anddollar-basednetexpansionrate. NumberofActiveCustomerAccounts.TwiliobelievesthatthenumberofActiveCustomerAccountsisanimportantindicatorofthegrowthofitsbusiness,the marketacceptanceofitsplatformandfuturerevenuetrends.twiliodefinesanactivecustomeraccountattheendofanyperiodasanindividualaccount,as identifiedbyauniqueaccountidentifier,forwhichtwiliohasrecognizedatleast$5ofrevenueinthelastmonthoftheperiod.twiliobelievesthatuseofits platformbycustomersatorabovethe$5permonththresholdisastrongerindicatorofpotentialfutureengagementthantrialusageofitsplatformorusageat levelsbelow$5permonth.asingleorganizationmayconstitutemultipleuniqueactivecustomeraccountsifithasmultipleaccountidentifiers,eachofwhichis treatedasaseparateactivecustomeraccount. BaseRevenue.TwiliomonitorsBaseRevenueasoneofthemorereliableindicatorsoffuturerevenuetrends.BaseRevenueconsistsofallrevenueotherthan revenuefromlargeactivecustomeraccountsthathaveneverenteredinto12-monthminimumrevenuecommitmentcontractswithtwilio,whichthecompany referstoasvariablecustomeraccounts.whilealmostalloftwilio scustomersexhibitsomelevelofvariabilityintheusageofitsproducts,basedonthe experienceoftwilio smanagement,twiliobelievesthatvariablecustomeraccountsaremorelikelytohavesignificantfluctuationsinusageofitsproductsfrom periodtoperiod,andthereforethatrevenuefromvariablecustomeraccountsmayalsofluctuatesignificantlyfromperiodtoperiod.thisbehaviorisbest evidencedbythedecisionofsuchcustomersnottoenterintocontractswithtwiliothatcontainminimumrevenuecommitments,eventhoughtheymayspend significantamountsontheuseofthecompany sproductsandtheymaybeforegoingmorefavorabletermsoftenavailabletocustomersthatenterintocommitted contractswithtwilio.thisvariabilityadverselyaffectstwilio sabilitytorelyuponrevenuefromvariablecustomeraccountswhenanalyzingexpectedtrendsin futurerevenue. ForhistoricalperiodsthroughMarch31,2016,TwiliodefinedaVariableCustomerAccountasanActiveCustomerAccountthat(i)hadneversignedaminimum revenuecommitmentcontractwiththecompanyforatermofatleast12monthsand(ii)hasmetorexceeded1%ofthecompany srevenueinanyquarterinthe periodspresentedthroughmarch31,2016.toallowforconsistentperiod-to-periodcomparisons,intheeventacustomerqualifiedasavariablecustomeraccount asofmarch31,2016,orapreviouslyvariablecustomeraccountceasedtobeanactivecustomeraccountasofsuchdate,twilioincludedsuchcustomerasa VariableCustomerAccountinallperiodspresented.ForreportingperiodsstartingwiththethreemonthsendedJune30,2016,TwiliodefinesaVariableCustomer Accountasacustomeraccountthat(a)hasbeencategorizedasaVariableCustomerAccountinanypriorquarter,aswellas(b)anynewcustomeraccountthat(i) hasneversignedaminimumrevenuecommitmentcontractwithtwilioforatermofatleast12monthsand(ii)meetsorexceeds1%ofthecompany srevenuein aquarter.onceacustomeraccountisdeemedtobeavariablecustomeraccountinanyperiod,theyremainavariablecustomeraccountinsubsequentperiods unlesstheyenterintoaminimumrevenuecommitmentcontractwithtwilioforatermofatleast12months.

11 Dollar-BasedNetExpansionRate.Twilio sabilitytodrivegrowthandgenerateincrementalrevenuedepends,inpart,onthecompany sabilitytomaintainand growitsrelationshipswithexistingactivecustomeraccountsandtoincreasetheiruseoftheplatform.animportantwayinwhichtwiliotracksitsperformance inthisareaisbymeasuringthedollar-basednetexpansionrateforactivecustomeraccounts,otherthanvariablecustomeraccounts.twilio sdollar-based NetExpansionRateincreaseswhensuchActiveCustomerAccountsincreasetheirusageofaproduct,extendtheirusageofaproducttonewapplicationsoradopt anewproduct.twilio sdollar-basednetexpansionratedecreaseswhensuchactivecustomeraccountsceaseorreducetheirusageofaproductorwhenthe Companylowersusagepricesonaproduct.Asourcustomersgrowtheirbusinessesandextendtheuseofourplatform,theysometimescreatemultiplecustomer accountswithusforoperationalorotherreasons.assuch,forreportingperiodsstartingwiththethreemonthsendeddecember31,2016,whenweidentifya significantcustomerorganization(definedasasinglecustomerorganizationgeneratingmorethan1%ofrevenueinaquarterlyreportingperiod)thathascreateda newactivecustomeraccount,thisnewactivecustomeraccountistiedto,andrevenuefromthisnewactivecustomeraccountisincludedwith,theoriginal ActiveCustomerAccountforthepurposesofcalculatingthismetric.TwiliobelievesthatmeasuringDollar-BasedNetExpansionRateonrevenuegeneratedfrom ActiveCustomerAccounts,otherthanVariableCustomerAccounts,providesamoremeaningfulindicationoftheperformanceoftheCompany seffortsto increaserevenuefromexistingcustomeraccounts. Twilio sdollar-basednetexpansionratecomparestherevenuefromactivecustomeraccounts,otherthanvariablecustomeraccounts,inaquartertothesame quarterintheprioryear.tocalculatethedollar-basednetexpansionrate,thecompanyfirstidentifiesthecohortofactivecustomeraccounts,otherthan VariableCustomerAccounts,thatwereActiveCustomerAccountsinthesamequarteroftheprioryear.TheDollar-BasedNetExpansionRateisthequotient obtainedbydividingtherevenuegeneratedfromthatcohortinaquarter,bytherevenuegeneratedfromthatsamecohortinthecorrespondingquarterintheprior year.whentwiliocalculatesdollar-basednetexpansionrateforperiodslongerthanonequarter,itusestheaverageoftheapplicablequarterlydollar-basednet ExpansionRatesforeachofthequartersinsuchperiod. Source:TwilioInc.

12 TWILIO INC. Condensed Consolidated Statements of Operations (In thousands, except share and per share amounts) (Unaudited) Three Months Ended June 30, Revenue $ 95,870 $ 64,510 Costofrevenue 42,333 28,203 Grossprofit 53,537 36,307 Operatingexpenses: Researchanddevelopment 29,714 17,369 Salesandmarketing 26,153 18,156 Generalandadministrative 4,740 11,635 Totaloperatingexpenses 60,607 47,160 Lossfromoperations (7,070) (10,853) Otherincome(expenses),net 471 (28) Lossbeforeprovisionforincometaxes (6,599) (10,881) Provisionforincometaxes (510) (113) Netlossattributabletocommonstockholders $ (7,109) $ (10,994) Netlosspershareattributabletocommonstockholders,basicanddiluted $ (0.08) $ (0.45) Weighted-averagesharesusedincomputingnetlosspershareattributabletocommonstockholders,basicanddiluted 90,873,305 24,261,903

13 TWILIO INC. Condensed Consolidated Balance Sheets (In thousands) (Unaudited) As of As of June 30, December 31, Assets Currentassets: Cashandcashequivalents $ 92,184 $ 305,665 Short-termmarketablesecurities 197,031 - Accountsreceivable,net 37,321 26,203 Interestreceivable Prepaidexpensesandothercurrentassets 18,510 21,512 Totalcurrentassets 345, ,380 Restrictedcash 7,448 7,445 Propertyandequipment,net 44,083 37,552 Intangibleassets,net 22,324 10,268 Goodwill 16,950 3,565 Otherlong-termassets 1, Totalassets $ 437,947 $ 412,694 Liabilities and Stockholders Equity Currentliabilities: Accountspayable $ 4,267 $ 4,174 Accruedexpensesandothercurrentliabilities 50,551 59,308 Deferredrevenue 12,583 10,222 Totalcurrentliabilities 67,401 73,704 Long-termliabilities 12,438 9,543 Totalliabilities 79,839 83,247 Commitmentsandcontingencies Stockholders equity: Commonstock Additionalpaid-incapital 564, ,090 Accumulatedothercomprehensiveincome 1,287 - Accumulateddeficit (208,066) (186,730) Totalstockholders equity 358, ,447 Totalliabilitiesandstockholders equity $ 437,947 $ 412,694

14 TWILIO INC. Condensed Consolidated Statements of Cash Flow (In thousands) (Unaudited) Six Months Ended June 30, Operating Activities: Netloss $ (21,336) $ (17,462) Adjustmentstoreconcilenetlosstonetcashprovidedbyoperatingactivities: Depreciationandamortization 8,480 3,285 Amortizationofbondpremium Stock-basedcompensation 21,785 8,001 Provisionfordoubtfulaccounts Taxbenefitrelatedtostock-basedcompensation - 12 Gainonleasetermination (295) - Write-offofinternallydevelopedsoftware Changesinassetsandliabilities: Accountsreceivable (9,365) (4,733) Prepaidexpensesandothercurrentassets 2,073 (10,212) Otherlong-termassets (932) (108) Accountspayable (1,282) 4,648 Accruedexpensesandothercurrentliabilities (6,311) 8,823 Deferredrevenue 2,353 2,561 Long-termliabilities 296 9,305 Netcashprovidedby(usedin)operatingactivities $ (4,049) $ 5,113 Investing Activities: (Increase)decreaseinrestrictedcash 1,170 (7,439) Purchasesofmarketablesecurities (220,914) - Maturitiesofmarketablesecurities 23,000 - Capitalizedsoftwaredevelopmentcosts (8,000) (5,390) Purchasesofpropertyandequipment (6,772) (1,945) Purchasesofintangibleassets (154) (310) Acquisition,netofcashacquired (22,621) - Netcashusedininvestingactivities $ (234,291) $ (15,084) Financing Activities: Proceedsfrominitialpublicoffering,netofunderwritingdiscounts - 160,426 Paymentsofcostsrelatedtopublicofferings (430) (2,099) Proceedsfromexercisesofstockoptions 18,154 4,274 ProceedsfromsharesissuedinESPP 7,404 - Valueofequityawardswithheldfortaxliabilities (311) (79) Netcashprovidedbyfinancingactivities $ 24,817 $ 162,522 Effectofexchangeratechangesoncashandcashequivalents 42 - Netincrease(decrease)incashandcashequivalents (213,481) 152,551 Cashandcashequivalentsatbeginningofperiod 305, ,835 Cashandcashequivalentsatendofperiod $ 92,184 $ 261,386

15 TWILIO INC. Reconciliation to Non-GAAP Financial Measures (In thousands, except share and per share amounts) (Unaudited) Three Months Ended June 30, Gross profit $ 53,537 $ 36,307 Non-GAAPadjustments: Stock-basedcompensation Amortizationofacquiredintangibles 1, Non-GAAPgrossprofit $ 54,861 $ 36,405 Non-GAAPgrossmargin 57% 56% Research and development $ 29,714 $ 17,369 Non-GAAPadjustments: Stock-basedcompensation (5,710) (2,379) Amortizationofacquiredintangibles (38) (38) Payrolltaxesrelatedtostock-basedcompensation (223) - Non-GAAPresearchanddevelopment $ 23,743 $ 14,952 Non-GAAPresearchanddevelopmentas%ofrevenue 25% 23% Sales and marketing $ 26,153 $ 18,156 Non-GAAPadjustments: Stock-basedcompensation (2,363) (1,116) Amortizationofacquiredintangibles (202) - Payrolltaxesrelatedtostock-basedcompensation (128) - Non-GAAPsalesandmarketing $ 23,460 $ 17,040 Non-GAAPsalesandmarketingas%ofrevenue 24% 26% General and administrative $ 4,740 $ 11,635 Non-GAAPadjustments: Stock-basedcompensation (4,185) (1,453) Amortizationofacquiredintangibles (20) (28) Acquisitionrelatedexpenses (58) - Releaseoftaxliabilityuponobligationsettlementandestimaterevisions 12,161 - Payrolltaxesrelatedtostock-basedcompensation (253) - Non-GAAPgeneralandadministrative $ 12,385 $ 10,154 Non-GAAPgeneralandadministrativeas%ofrevenue 13% 16% Loss from operations and margin $ (7,070) $ (10,853) Non-GAAPadjustments: Stock-basedcompensation 12,400 4,976 Amortizationofacquiredintangibles 1, Acquisitionrelatedexpenses 58 - Releaseoftaxliabilityuponobligationsettlementandestimaterevisions (12,161) - Payrolltaxesrelatedtostock-basedcompensation Non-GAAPlossfromoperations $ (4,727) $ (5,741) Non-GAAPoperatingmargin (5%) (9%)

16 TWILIO INC. Reconciliation to Non-GAAP Financial Measures (In thousands, except share and per share amounts) Three Months Ended (Unaudited) June 30, Net loss attributable to common stockholders $ (7,109) $ (10,994) Non-GAAPadjustments: Stock-basedcompensation 12,400 4,976 Amortizationofacquiredintangibles 1, Acquisitionrelatedexpenses 58 - Releaseoftaxliabilityuponobligationsettlementandestimaterevisions (12,161) - Payrolltaxesrelatedtostock-basedcompensation Non-GAAPnetlossattributabletocommonstockholders $ (4,766) $ (5,882) Non-GAAPnetlossattributabletocommonstockholdersas%ofrevenue (5%) (9%) Net loss per share attributable to common stockholders, basic and diluted* $ (0.08) $ (0.45) Non-GAAPadjustments: Stock-basedcompensation Amortizationofacquiredintangibles Acquisitionrelatedexpenses Releaseoftaxliabilityuponobligationsettlementandestimaterevisions (0.13) - Payrolltaxesrelatedtostock-basedcompensation Convertiblepreferredstock Non-GAAPnetlosspershareattributabletocommonstockholders,basicanddiluted $ (0.05) $ (0.08) GAAP weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted 90,873,305 24,261,903 Weighted-average shares of convertible preferred stock issued and outstanding - 48,544,203 Non-GAAP weighted-average shares used to compute Non-GAAP net loss per share attributable to common stockholders, basic and diluted 90,873,305 72,806,106 *Somecolumnsmaynotaddduetorounding

17 TWILIO INC. Key Metrics (Unaudited) March 31, June 30, Sept. 30, Dec. 31, March 31, June 30, NumberofActiveCustomers(as of end date of period ) 28,648 30,780 34,457 36,606 40,696 43,431 BaseRevenue(in thousands) $49,834 $56,370 $64,099 $75,245 $80,643 $87,583 Base Revenue Growth Rate 92% 84% 75% 73% 62% 55% Dollar-BasedNetExpansionRate 170% 164% 155% 155% 141% 131% CONTACT: TwilioInc. InvestorContact: GregKleiner ir@twilio.com or MediaContact: CaitlinEpstein press@twilio.com