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YC Summer 2021The S21 batch: 391 companies, 34% AI

Started Jun 2021

One tile per company, AI first. Colours as in the river.

391
companies
34%
AI
28
data
59
developer tools

By category

S21 by category

Where are they now

S21 by status

The S21 companies

391 of 391 companies

AbbotInactiveYour Customer Success Co-PilotAbstraAIAutomate finance operations with Python and AIAdaptyvAIWe're building fully automated labs for protein engineeringAdniAIThe career community for healthcare workersAdravisionAIAutomation for dental clinics and insurance companies.Affogato AIAIAffogato AI — Your Agent for instant TikToks, Reels, and ads.AI Tech PacksAIBuild factory ready tech packs in minutes.AlgoViralAIWe help high-growth startups go viral on autopilotAnakinAIOne API to get clean data from any website for your AI agents at scaleAquaAIThe AI-Native Turnkey Alternative Investment Platform (TAIP)ArchbeeDeveloper toolsTURN STATIC DOCS INTO INSTANT ANSWERSArenguAcquiredBuild frictionless signup flows in minutesArtilleryAIThe complete production quality platform. AI-powered E2E testing,…aSimAIBuild and share apps with friendsAviatorDeveloper toolsGoogle-level engineering productivity suiteBaubapAISmart micro financing for everyoneBite NinjaAIRemote labor for restaurantsBoldVoiceAISpeech and accent coaching app for non-native English speakersBreadcrumbs.ioAcquiredNo-code scoring engine identifying your most engaged upsell oppsBuró de IngresosDeveloper toolsThe Work Number for LatAmBuzzleInactiveAutomatic voice-of-customer trends & metrics from sales conversations.Byte KitchenAcquiredIncreasing restaurant profitability through our AI Operating SystemBytebotAcquiredBytebot is the open source container for AI desktop agents.Caire HealthAISemi-Autonomous Diagnostics for Emergent CareCellChorusAIThe dynamic single-cell analysis companyCeroAIAutomated communication between hospitals and patients in LatamCloudanixDeveloper toolsCloud and Container Security PlatformCloudthreadAcquiredEliminate Cloud Waste. Attribute and Track Savings. Engage Engineers.CoastAIDemo Platform for API-First CompaniesCoinruleAICoinrule Automates Your Crypto and Stock InvestmentsCoLoopAIAI Copilot for insights & strategyConcord MaterialsAIAutomating procurement and finance for construction companiesConfidoAIAI-enabled financial automation and intelligence for CPG BrandsContraForceAISecurity Delivery Platform to orchestrate AI agents for Service…Coulomb AIAIBattery Observability Platform for Electric VehiclesCrewAINext Gen ATS/CRM for Modern Recruitment AgenciesCumbucaDeveloper toolsBare-metal access to Brazil's Open Finance and Pix systemsCustomilyDeveloper toolsMaking it easy to sell personalized products online.DailybotAIMake all team work visible — people and AI agentsDatloDataDatlo helps companies increase sales and expand through dataDigiBuildAIWe buy & track building materials for construction companies.DimeInactiveInstant E2E tests for your websiteDots 💸Developer toolsDeveloper friendly drop in payouts infrastructureEchoes HQDeveloper toolsMeasure and communicate engineering activityEndlaDataSoftware that increases the value of oil & gas wellsEnsoDataSelf-Service Data Prep and Blend Built for Data Teams.Epsilon3AIAI-Powered ERP, MES, and Test Software for Complex OperationsEvidenceDataBusiness intelligence as codeEvidently AIAIOpen-source monitoring for machine learning modelsExaAIWeb search rebuilt for LLMsFerveretAINuclear-inspired cooling that turns wasted power into more AI computeFiladdAIWe help students in Latin America graduate from College.FirstIgniteAcquiredAI-Powered Business Development for Scientific OrganizationsFirstQuadrantInactiveSales AI that helps revenue teams move faster and close more deals.FitiaAIAutomated Meal Planner & Nutrition TrackingForage MailInactiveAI that solves email overwhelm. Not another mail app.FormanceDeveloper toolsOpen Source Infrastructure for the Financial InternetGeostarAIGeostar drives inbound for companies through search.GetDotAIYour AI Data AnalystHarmonic DiscoveryAIMulti-targeted therapeutics to treat complex diseasesHireboltAIAI engineering capacity. Made simple. ⚡️hotglueDeveloper toolsNative user-facing SaaS integrations for your customersHudson Labs (formerly Bedrock AI)AIAI-powered equity research softwareHyperbrowserAIWeb infra for AI agentsidemeumAIAI-powered Application ControlIntellectAIA modern-day mental healthcare company for global workforces.JestorAISaving OPS from SLOPS. Jestor builds internal systems that last.JovianAIOnline University for Tech ProfessionalsKalam LabsAIAutonomous Stratospheric UAVsKayaAIMarketing agency for startups: 10x cheaper, better and fasterKodexAIEasiest way for companies to process data requests from governmentsKonta.comAITurbotax for México and LATAMLagoAIThe AI Native Billing PlatformLariat DataInactiveObservability for Data Engineering TeamsLegion HealthAIAutonomous medical careLightlyAIHelp ML teams label the right dataLitnerdAIReading + Writing Club App for KidsMach9AIAI CAD Software for Civil EngineeringMakani ScienceAIReinventing respiration monitoringMalloc IncAIAI-driven mobile cybersecurityMarqVisionAIIP operating software for brands and content companiesMatrubialsAIDeveloping milk-inspired therapeutics for infectious diseasesMedium BiosciencesAIAI-designed Affinity ReagentsMentumAcquiredAI-Powered Assistant for Procurement and Strategic SourcingMergentDeveloper toolsIncredibly reliable background task queues and cron jobsMeticulousDeveloper toolsAutomated e2e screenshot testing without writing or maintaining testsMilky Way AIInactiveMobile app for CPG brands to connect to millions of stores globallyMindFiAITransforming Mental Health for Corporate AsiaMindstate Design LabsAIProgrammable biology company for psychoactive effect designMineInactiveThe AI personal finance company.MiniloopAIAI workflow engine for reliable systemsMobileBoostAIAI native mobile testing.Moving PartsInactiveDelightful components for iOS.NeodocsAIInstant lab tests on your smartphoneNolocoAIFlexible Business Apps for Modern TeamsOneSchemaAIThe AI Cowork for big dataOneStopKitchenInactiveAI-Driven Tech & Space Optimization to Scale RestaurantsOpenlayerAIThe fastest way to ship airtight AIOpkitInactiveAI phone calls for the US healthcare industryoutloud.aiInactiveBuilding Gong.io for offline retail.Output BiosciencesAIThe foundation for the next era of biologyParallel BioAIUsing the immune system to cure diseasePatternsInactiveNext-Gen Financial Analysis and Reporting with AI AgentsPideakyAIWe help offline LatAm SMBs manage and accelerate their cash-flowPipekitDataPipekit scales data & CI pipelines for enterprisesPlaiAICreate, launch, and optimize Facebook ads and ads on 10+ platformsPluggyDeveloper toolsPlaid for Brazil: we allow developers to access users' financial dataPotionAIAI for product formulationProtex AIAIComputer vision that makes the industrial workplace, saferPylonDeveloper toolsInfrastructure management software for water & electricity companiesRedbeanAIMake games and stories with AIReploAISell anythingRevery AIInactiveTiktok for fashion - where designers show their work + build tractionRGI LabsAIRobust & recursively self-improving general intelligenceRivia.AIAIInteractive Product DemosRMFGAIAdvanced Contract MFG for fast moving hardware companiesRootlyAIAI-native on-call and incident response carefully crafted to help…Ruta HealthInactiveAsync personalized and actionable health education by real doctorsRuth HealthInactiveTelehealth hub for pregnant people 🧡SafeBeatAIGuiding cardiac therapeutics - all from your phoneSafer ManagementAIStudent Attendance tracking for Public SchoolsSalaryBoxAIGusto for IndiaSatsumaAcquiredReliable blockchain indexing & querying for web3 engineering teams.ScispotAIThe Best Data Infrastructure for BiotechsScratch DataInactiveAnalytics for builders. Record and query billions of datapoints with…SecodaAISecoda is the AI layer for your AnalyticsSenpAI.GGInactivePersonal gaming coach for PC gamers globallySentiyenAIConversational AI assistants using your knowledgeSequinAISequin is building AI Voice Agents to automate collections calls for…SFA TherapeuticsAIRegulating the immune system to block cancer & autoimmune diseasesShapeAIGet data insights without writing SQLShipBluAIAmazon Level Logistics for eCommerce Companies in MENA.SleekAcquiredBrowser automation for businesses.SlopeAIThe B2B Payments PlatformSnapCalorieAISingle photo nutrition tracking.SocoAIVisual AI shoppingSpark StudioAIThe most magical personal Voice-Led AI English Learning Buddy for KidsSpokenInactiveNever overpay onlineSquire.aiInactiveNever code alone.StardexAIAI native ATS + CRM for executive search firmsSullyAIAutonomous team of AI agents that runs the entire hospital operationsSuperwallAISubscription infrastructure & paywall experimentation for mobile appsSwipeAISuper AI Accountant for SMBsTarsalAcquiredData pipeline for your security data lake.TavusAIBuilding the human layer of AITelmaiAIAutomated data observability and quality for Data LakeTenyksAIThe World's Most Versatile Video Answering EnginetestRigorDeveloper toolsExecutable specifications in English for test automationThe BreakawayAIThe personal coach and companion for cyclists.Tiriel AIAIThe AI workforce for freight dispatchVarosAIAI Business Analysts to gather requirements and optimize processesVerihubsAIAI-powered Deepfake DetectionVibe KanbanAIPlan and review AI generated codeVogentAcquiredBuild Voice AI AgentsWarpBuildAIAccelerate software development with WarpBuild's 10x faster CI infra.WarpfyAIBuilding Shein of Home: tech-driven, design-mfr Home Lifestyle BrandWarrantAcquiredAuthorization and access control as a service.WaterplanAIWater risk mitigation for industrial sitesWhalesyncDataManage your website from your favorite tools like Airtable and NotionWhalyDataWhaly is building a self-service analytics platformWritesonicAITrack & Boost Your Brand’s Visibility in AI Searchzaz⚡️osAIThe custom all-in-one OS for each company.Zeit MedicalAIImmediate stroke detection at homeZensorsAIAI to understand and automates the physical worldZumaAIWe help businesses convert leads into sales in minutes using textAbatableOtherCarbon markets platform and solutionsAbhiOtherAbhi is Pakistan's 1st financial wellness platform focusing on…Advantage ClubOtherGlobal platform for employee engagement with rewards&flexible benefitsAerAcquiredCompound compliance: the central hub for meeting SEC obligationsAgapéOtherFeel close, even when apart. One meaningful conversation at a time.AhazouOtherPodium for local businesses in LatamAkudoInactiveIndia's first learning-focused neobank for teenagersAkute HealthOtherThe medical record & infrastructure stack for digital health companiesAlephOtherOne source of truth for financial data.Aleph Solutions (Alephee)OtherWe help automotive aftermarket brands to supply and sell parts onlineAlgofiInactiveBuilding the new financial systemAlgoUniversityOtherBuilding Job driven Virtual Tech University for India 🇮🇳AmenliOtherOffers insurance to customers in a convenient & transparent wayAnanya HealthOtherPortable cryoablation to prevent cervical cancerAncanaOtherMarketplace for vacation home co-ownership, fully managedAOA DxOtherBlood Test for Early Detection of Ovarian CancerApolloInactiveThe card that rewards you with stockAppXOtherAppX helps social media creators launch their own mobile apps.ARQOtherThe global financial platform for affluent consumers in the Americas.ArrowOtherModern Checkout Platform for D2C brands in Southeast AsiaAstek DiagnosticsOtherOne-hour antibiotic sensitivity testingAtlasOtherOperating system for restaurants, focusing on Southeast AsiaAtmanaOtherApps to control technology addictions/ helping startups hire engineersAwesomicOtherGet matched with top 1% of talents in 24hBarakaOtherGrow Your Wealth With BarakaBeauOtherWorkflows for repetitive customer-facing tasksBeeperAcquiredOne chat app to rule them allBirdieOtherConnect LinkedIn to your CRM to automate and track LinkedIn outreach.BlackOakTVInactiveA video subscription platform serving black viewers and creators.BlixoOtherAccounts receivable automation to help companies get paid fasterBLUUMBIOOtherWe make bacteria and plants that clean up pollution.BolsterOtherThe platform for buying, selling and managing residential constructionBreeOtherChime for Canada, starting with cash advancesBriteOtherSoftware that helps employees pick their employee benefits.Buoyant AeroOtherBringing back blimpsCabalOtherPrivate workspace for founders, investors, and advisors to collaborateCacheInactiveOnline convenience stores fulfilled by tiny, automated dark stores.CaféOtherYour Workplace Engagement HubCanopiInactiveAPI to measure and eliminate carbon emissionsCarbonfactOtherDecarbonizing the fashion industryCareeristOtherLearning platform for job seekers with job applications automationCartpandaOtherGlobal online sales platformCatena BiosciencesOtherUsing protein coupling to build new therapiesCharge RoboticsOtherRobots that build solar farmsChariOtherB2B e-commerce and fintech platform for traditional proximity storesChipaxOtherQuickbooks for SMBs in LatamCococartOtherEmpowering local businesses to sell online.Comet HealthInactiveDigital platform for pelvic floor physical therapyCommeryInactiveMarketplace to lease commercial real estateContalinkOtherWe help Accountants automate work and serve their customers onlineCovieInactiveProgrammatic building blocks for transacting with insuranceDeedAcquiredMaking it easy for employees to donate and volunteer with good causes.DeskimoOtherWorkspaces on demand, paid by the minute.DigistainOtherPioneering Breast Cancer Diagnostics for a Healthier TomorrowDoubleOtherWe make software for bookkeepers.EncuadradoOtherPayments and scheduling for services professionals in LATAMEnerjazzOtherMaking electric vehicle batteries affordableEpinomaOtherWe engineer proteins that control the operating system of biology.Equipt HealthOtherHome medical equipment, prescribed online and delivered.ExamediOtherUber for Healthcare in LatinamericaFastFarmaInactiveDigital pharmacy for Latam, that saves you money and time.Female InvestOtherThe world's largest financial education and community app for womenFiltaOtherThe Face Filter NFT MarketplaceFingo AfricaAcquiredA neobank for Africa's 500 million youthFloatOtherSupply chain finance for consumer brandsFloatpays IncOtherOn-demand wage access service built for the African marketFlow ClubOtherVirtual Co-working CommunityFlowboInactivePipe for online businessesFlowlyOtherOur mobile app reduces chronic pain for 100 million Americans.flukeOtherfluke is a full-digital mobile operator in BrazilForageOtherPayments powering peopleFreteriumOtherReal-Time Collaborative Transport Management PlatformFrontPageOtherCommunity for 100M Indian Financial Market Traders & InvestorsGamerPayAcquiredWe are the marketplace for trading gaming skins & assets without scamsGenomelinkOtherDNA App StoreGenuityOtherSaaS Platform to manage IT and buy business softwareGlitziOtherAt-home spa, beauty & grooming services marketplace for LatAmGobillionInactivePinduoduo for IndiaGoodkindAcquiredStudent communications platform for higher educationGovlyOtherThe #1 Market Network for Government Contractors.HedgehogInactiveCryptocurrency Robo-adviser. Buy. Balance. Relax.HeimdalInactiveAffordable and verified direct air carbon capture and storageHEO RoboticsOtherWe visually monitor space objects for governments and defenseHeraInactiveCalendar app to prepare, join and follow-up on virtual meetingsHeyChargeOtherLow-cost, high-scale EV charging platform for apartments (and more).HilosAcquiredClose and activate your customers on WhatsAppHitPayOtherFull-stack payments infrastructure for growing APAC businessesHive HealthOtherSimplified digital health insurance for Filipino SMBsHumane GenomicsOtherA platform to make artificial viruses as cancer therapeutics.HyperAcquiredSell memberships to your Discord serverHypercontextInactiveMeeting agendas, notes, & goals that tie back to your OKRsHypercoreOtherLoan management software for private lendersHyperseedInactiveZapier for billingHyperTraderOtherThe Trading Terminal For Crypto TradersinaiAcquiredSegment for global paymentsInferOtherOperating system for insurance agenciesInfinaOtherLeading wealth management and investing platform in VietnamInfiuss HealthOther2 sided Marketplace for accelerating medical researchInflowAcquiredA self-help app for people to manage their ADHD.InstacropsOtherHelping farmers maximize crop yieldInstaKinOtherFinancial Platform for Migrant Families in AmericaInversion SpaceOtherTurning space into a transportation layer for EarthIvellaInactiveBanking and savings products designed for couplesIvy HomesOtherWe make instant offers to buy homes in IndiaJABUOtherB2B payments, transforming Africa's cash economyJupeInactiveJust add landKaiPod LearningOtherA national network of microschools bringing school choice to every…Kapacity.ioAcquiredReducing energy costs & emissions in buildings.Karbon CardOtherCorporate Card solution for Indian businessesKeyriAcquiredSecure fraud prevention and authentication platform for developersKindamagicalInactiveCreate + share amazing product GIFs in minutes ⚡️Kiwi BiosciencesOtherPatent-pending enzymes to break down common dietary triggersKoddaInactiveKoshexOtherAutomating wealth creation for 400M Indian millennialsKuriosInactiveCohort-based online courses for professionals in Latin AmericalapzoOtherLattice for Latam with personalized learning and developmentLaudableAcquiredApp for B2B companies to find customer stories and advocatesLemFiOtherFair, simple and accessible financial servicesLevelAcquiredFast and simple fintech financingLevoInactiveTreasury management platform for SMBs to optimize idle cash in LatamLevroOtherMulticurrency account & international payments for businessesLiv LabsOtherPelvic floor fitness made easyLobbyInactiveLocal onboarding for the $200B health tourism industryLocaleOtherOrganic and gourmet high-protein meals, designed for longevity.LootRushOtherThe global operating account you truly deserve.LuableOtherLatin America's Deposits Marketplace for BanksLuminateOtherWe make cancer care at home possible.MableAcquiredFirst personalized migraine clinic using genetics and telehealth.MadEatsAcquiredOnline delivery-only restaurant group in the PhilippinesMailmodoAcquiredNo-code email marketing platform to send forms & widgets within emailsMalgaOtherMalga is an API to accept payments with multiple payment providersmarketfeedOtherHelping Indians make better financial decisions.MarooAcquiredCRM for creatives (acquired by Helium Ventures)Matidor.comOtherProject management on a live mapMecho AutotechOtherOn-demand auto maintenance & repairsMemboInactiveGroceries fresher than a farmer’s market, delivered to you (EU)MentorcamInactiveMentorship from leaders of the world's best companiesMicro MeatInactiveTechnologies for scaling up cultured/clean meat productionMindmeshInactiveMindmesh is the virtual desk that puts you in control.MixrInactiveTeam building through online game tournaments.Momo MedicalOtherWe help nurses in nursing homes to be 30% more effectiveMonetOtherPayroll-backed loans and cash advances in LatamMontoOtherSalary on-demand platform for Latin AmericaNasdiscAcquiredA marketplace for vinyl, cassettes and cdsNashOtherNash is the digital logistics infrastructure for commerceNexusInactiveNexus offers a unified checking and investment account.Nino FoodsInactiveBuilding India's fast food empireNomodOtherThe UAE’s leading small business payments platformNovatrOtherOnline cohort based courses for architects, engineers and designers…ODWENOtherAirBnB for Small WarehousesOdys AviationOtherVertical takeoff and landing aircraft for major airlinesOkaniOtherPreventive healthcare app for Latam.OnebriefOtherOnebrief makes military headquarters run seamlesslyOneShopInactiveList on multiple resale marketplacesOnfolkAcquiredGusto for the UKOnsite ProInactiveRevolutionizing digital selling within HVACOrderliOtherSquare for EuropePactimaAcquiredLive video signing for real-time agreementsPaletteHQOtherManage sales commissions and sales performancePallaOtherP2P Cross border paymentsPandaiOtherLearning app for school students in Southeast AsiaPayflowOtherA mobile app. It allows employees to get paid their salary on-demand.PayhippoOtherLoans to Nigeria's SMEs in under 3 hoursPAYZEInactiveStripe for former Soviet Union countriesPerfektoInactiveGrocery subscription service against food waste in LatamPhykosOtherGrowing seaweed to stabilize the climate.Pide DirectoOtherOne-stop-shop for restaurants to operate and grow their business.PillarOtherA white-label care enablement platformPirouette PharmaOtherWe make injections as easy as pushing a button!Planet A FoodsOtherBuilding the next generation food ingredient champion.Portão 3OtherWe are the frictionless way for companies to make payments.PositionalAcquiredA modern platform for content marketing & SEO.Promakhos TherapeuticsOtherA therapeutics platform for curing inflammatory disordersPropReturnsInactiveEnd-to-end commercial real estate transaction platformProtegoInactiveWe help companies recover lost revenue from chargebacksQuestInactiveAudio career adviceReframeOtherApp to help people quit or cut back on alcohol useRendaloMaqOtherTech-powered equipment rentals in Latam.RepoolOtherModernizing hedge fund back office software and services.REPROSENTOtherActivating an overlooked force in medicine - the patient.Revolve SurgicalOtherSurgical robotics for every operating roomRinseOtherWe're building the One Medical for dentalSalaryBookOtherMobile first solution for Payroll, employee & expense managementSensible BiotechnologiesOtherUnlocking the next generation of mRNA medicinesShimmerOther1:1 ADHD coaching, 5-10X More affordable than alternativesSigloOtherHome Internet for urban Latin AmericaSigmaOSOtherThe new home for your internet 🏡SirkaOtherNoom for Southeast AsiaSitennaOtherCompound B2B SaaS for modern infrastructure to deploy and manage sitesSlashOtherBanking, corporate cards, stablecoin payments – available globally.SolarMenteInactiveHome electrification at $0 upfront costSproutfiAcquiredLatin Americas' first investing social network. Learn. Share. Invest.StepfulOtherOnline Training for Healthcare JobsStipopOtherMonetization platform for character creatorsStorylaneOtherBuild Interactive Product Demo in 10 mins for SaaS companiesStownestOtherFlexible On-Demand Storage Space for Household, SMEs & Travellers.StrideQOtherAutomated phone ordering system for restaurantsStrive MathOtherOnline Coding School for Kids 8-16StudyStreamOther24/7 video platform & online community for students to study togetherSupliasOtherWe enable FMCG distributors in Africa buy inventory on creditSynderOtherEasy accounting for e-commerceTablevibeAcquiredDirect Ordering Software for RestaurantsTAGInactiveTAG is the First Digital Bank (Chime/Revolut/N26) for PakistanTalentdropInactiveYour personal hiring page.Talus BioOtherDiscovering drugs that target the DNA regulomeTelivyAcquiredAutomate your cyber security risk assessmentsTherifyOtherInclusive mental healthcare for companiesTitipkuOtherSuper Hyperlocal Marketplace for SMEs in IndonesiaTokuOtherAccount Receivables Platform for Latin American EnterprisesTransAstra CorporationOtherOrbital logistics: Unleashing space industry, from Earth to asteroidstriiOtherOne stop investment solution for retail investors in LatamTrussOtherBanking for constructionTuli HealthOtherTransforming pharmacies in the UK into diagnostic centersTurion SpaceOtherMoving Things Around in Space, Imaging Space Objects When We're NotUnion54OtherDevelopers of ChitChat, an integrated messaging and payments wallet…V-Flow MedicalInactiveTransforming the lives of millions of women suffering from chronic…VedaBioOtherCRISPR powered Diagnostics with results in minutes.Verano HealthAcquiredNonprofit telehealth coaches for underserved Americans on MedicaidVerdeInactiveDigital lending platform for Brazilian farmersVincoOtherRetaining employees in LatAm via educationWabiInactiveWe are Shopify for the $15B creator economy in LATAMYemaachi BiotechnologyOtherDiversifying precision cancer diagnostics and treatmentsYummyOtherThe everything app for LATAMZageInactivePay by bank and earn rewardsZenOtherPosture correction softwareZoios.OtherHelp start- and scale-ups excel at People, Culture and Performance.

S21 among all batches

Top tags in S21

  • Fintech81
  • Developer Tools33
  • Marketplace33
  • E-commerce25
  • Consumer Health Services21
  • Machine Learning20
  • Climate19
  • Education18
  • Biotech15
  • Healthcare14

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