YC Winter 2021The W21 batch: 336 companies, 30% AI
336
companies
30%
AI
17
data
65
developer tools
By category
- AI100 (30%)
- Data9 (3%)
- Developer tools41 (12%)
- Other186 (55%)
The W21 companies
336 of 336 companies
AbacumAIThe AI-native FP&A platform that helps Finance teams drive business…
AlineaAIAutomated investing for the next generation 💸
AlokaiDeveloper toolsFrontend Platform for eCommerce
AnimaAIThe next generation care enablement platform
arnataAIAI workers for the logistics industry.
ArpioDeveloper toolsRecover from any outage in 10 minutes or less.
Atomic IndustriesAISoftware orchestrated mass production of plastics
AuthologicDeveloper toolsStripe for online identity verification
authzedAIAuthorization Infrastructure securing AI at OpenAI, Zoom, & more
AvenueAcquiredObservability platform for operations teams
AvocadoAIAI-Native Restaurant POS
AXAR AIInactiveMulti-agent orchestration platform
Axiom.aiAINo-code Browser RPA
AxoloDeveloper toolsImproving Developer Experience with Streamlined Code Reviews
BiodockAICloud AI microscopy automation
BluelightDataAnalytics, built for the trades.
BotBuiltAIWe use robots to build houses.
BusinessOnBotAIAutomated user acquisition & selling on WhatsApp for businesses
CampDeveloper toolsA Nouns DAO governance client
ChatwootAIThe modern, open source, self-hosted AI customer support platform
ClayInactiveFigma for 3D design
ClearAIThe unbiased AI and data layer for skin health.
ClipDropAcquiredTurn regular mobile photos into professional product visuals
cloud humansAIAI-powered customer service for startups
CodeballInactiveAI-Powered Code Review
CodingalAILeading online after-school for kids & teens to learn AI & coding
Compose.aiAICut your writing time by 40% with AI-powered autocomplete
CurvenoteDeveloper toolsCommunication and publishing tools for scientists
CybleAICyble - World’s First Intelligence-Driven, AI-Native Security…
DarrowAIBring Justice to Light
DataheraldInactiveEmbed NL-to-SQL into your Product 📈
DatricsAIGenerative AI Healthcare Coding Automation
Degrees of FreedomInactiveDoF provides a high quality, affordable higher education alternative.
DreamWorldAIDreamWorld is a next-gen Minecraft with generative AI building
DyteAcquiredReal-time audio & video SDKs, ready to launch 🚀
Emerge ToolsAcquiredSupercharge your mobile apps
Enable UsAcquiredDigital Sales Rooms (Acquired by MindTickle)
EncordAIThe data layer for physical AI
EnodeDeveloper toolsEnergy Orchestration Platform
EstocaAIThe Logistics Operating System for E-commerce in LatAm
Expent IncAIProcure the right software 5x faster
FableInactiveThe command center for product teams
FathomAIThe most flexible AI meeting notetaker ever built.
Feroot SecurityAIAI-powered Compliance Platform for PCI 4, CCPA, HIPAA, CIPA, 50+ laws
FifthTryDeveloper toolsContinuous Documentation To End Documentation Rot
FintocDeveloper toolsAccount-to-Account payments in Mexico and Chile.
FirstSupport.aiAIAI Assistant for Customer Support
FlowEQDeveloper toolsNo-code workflow tool
FlutterFlowDeveloper toolsApplication Development Platform (Native Mobile + Web Apps)
Flux AutoAIPhysical AI for Warehouses and Factories
Fountain9AcquiredHelping food brands and retailers reduce food wastage
FrizAcquiredAI Social Media Manager
GalaxyInactive
GigsAIThe OS for Embedded Telecom
Great QuestionDeveloper toolsUser research on autopilot.
GreywingAIThe Operating System for Maritime
GroMoAIApp for independent agents to sell financial products in India
HaystackDataDelivery Analytics for Software Teams
HomeBreezeInactiveThe fastest and easiest way to make home upgrades
hoop.devDeveloper toolsCode review for DevOps tasks
HUBUCDeveloper toolsGlobal Card Issuing and Payment Processing Engine
HumaansAIAI-Powered HRIS for high performing teams
HumanceAIAI that keeps complex construction projects on schedule.
HyperGlueAcquiredBusiness intelligence on text
inBalanceAcquiredElectricity price forecasts for energy storage, ev charging, etc.
InfracostDeveloper toolsShift FinOps Left: Proactively Find & Fix Cloud Cost Issues
InpharmDAIWe provide a curated, evidence- based answer to any clinical question.
InvoidInactiveCreate identity verification workflows the way you want
JourneyAcquiredNo code platform for sales to tell better stories and win more deals.
JuneInactiveJune is the new way to do product analytics
KitemakerAcquiredA faster and more collaborative alternative to Jira for remote teams
Lamar HealthAITake Care of Shitty Paperwork for Expensive Drugs
LaudspeakerAcquiredOpen source mobile marketing platform. Alternative to appcues /…
LightTwistAIRealistic virtual video studio to record and stream from your browser
LiveFlowAIThe Unified AI-ERP & FP&A Platform
LogisticsOSDeveloper toolsWorld's fastest and most optimal route optimization engine
LunaticInactiveOperating System for server-side apps
MagicBellDeveloper toolsThe notification inbox for web/mobile applications.
MayanDataA growth automation platform for Amazon sellers
Milk VideoInactiveCreate video testimonials with a link
MindeeAIAI Document Understanding API
MindPortalInactiveThought-to-Language AI Models
MoichorAIAI Powered Animal Diagnostics
MoonvalleyAIBuilding the next generation AI creative studio
MysticInactiveLow latency API to run and deploy ML models
NavatticAIInteractive product demos
NimbusInactiveNimbus reduces Datadog costs by more than 60% without Manual Effort
OllamaAIGet up and running with large language models.
OpenCodeAIThe open source AI coding agent
Pangea.appAIHire Fractional Marketing + Design Talent
ParsagonAIAI to track and analyze public policy
PensilInactiveNew-Age White Label Community Platform SDKs and APIs for Games,…
Per DiemAIThe AI operating system for restaurants
Pibit.aiAIThe fastest path from submission to better decisions.
PipeBioAcquiredPipeBio is a SaaS bioinformatics platform to develop antibody drugs.
PlatypusInactiveThe Distributed Data Operating System
PoplAIYour AI GTM platform for In-Person EventsPragmatic Leaders (Ankai Inc)AIAI-powered Corporate Training: Faster, Smarter, and More Effective
PrequelDataHelping B2B co's sync data to their customers
Promoted.aiAcquiredDramatically better search and ads for marketplaces
PyroscopeAcquiredOpen source continuous profiling software to debug performance issues
Quadrant EyeInactiveBreaking new ground in online eyecare.
Quadrant HealthAIAnalyzing EHR and messaging data to predict disease before it occurs.
QuicknodeDeveloper toolsTools & infra to build and scale high-quality blockchain applications.
Reclaim ProtocolAIEducation, Employment, Loyalty verification. Global & Compliant.
Rejoy HealthAIAI workers that book, scribe, code, interpret, and answer clinicians
RinsedAISoftware to run car washes moving to a monthly subscription model
RocketSDRAIAI Native Sales Outreach Platform
RoutineAIAI-native all-in-one workspace for startups
RulebricksDeveloper toolsAdd powerful decision-making capabilities to any automated workflow.
RunwayDeveloper toolsEasier and more reliable mobile app releases for teams.
SBX RoboticsInactiveSynthetic data for better vision.
Segments.aiAcquiredBuild better computer vision models by building better datasets
SigNozDeveloper toolsOpen source alternative to DataDog
SimplifyAIHelping a billion people build their dream career
SivoAIDebt as a service for companies to lend money to their users at scale.
SlashAuthInactiveThe solution for fine-grained access control in web3
SmartcutsDeveloper toolsChrome extension to turn clicks & keystrokes into no-code automations
SorabanAIAI tax workflow platform for accounting firms
SplineAIDesign and collaborate in multiple dimensions.
SpoknAIAI-powered video platform for Internal Comms and HR teams
SpruceIDDeveloper toolsSpruceID lets users control their data across the web.
SupadockAIMulti-agent AI for physical logistics operations
SvixDeveloper toolsEnterprise ready webhooks service, open-source and in the cloud
SwiftSkuDataManagement and analytics software for convenience stores
TaloflowDeveloper toolsBetter, faster tech vendor research
TaoFiAcquiredThe financial layer for decentralized AI
Terra APIDeveloper toolsAPI for developers and AIs to access health data
TintAIMakes it easy for tech platforms to embed insurance into products
Topline ProAIGenerative AI powered Shopify for home service professionals
TractianAIPhysical AI for asset-heavy industries
TreintaAISoftware and AI tools for SMBs in the US and Latin America
TrendpopAcquiredDiscover trends as they happen
TriomicsAIAI Agents for Oncology EHRs
TriplitInactiveThe best database for app developers
True3DAIBuilding the next generation of visual media
Turing CollegeAIAI-driven online tech school for busy professionals
UiflowAcquiredNo-code platform for enterprise software companies
unSurveyAcquiredAI-led market research interviews, no scheduling, instant insights.
VapiAIVoice AI for developers.
Venu AIAIMeet qualified leads in person by automating conference production
VerakAcquiredBetter Business Insurance for MSMEs in India
Version Story CompareAIGit for Lawyers — now within Claude
WaspDeveloper toolsConfiguration language for building enterprise web apps 10x faster
WaydevAIEngineering intelligence for AI transformation
WaypointDeveloper toolsThe email API built for product teams
WebinyDeveloper toolsOpen-source framework for building serverless applications
WeekdayAIAI recruiter that runs outbound sourcing campaigns to find top talent
weweb.ioDeveloper toolsWeWeb is a no-code front-end builder that connects with any back-end.
ZOKOAIBetter Business on WhatsApp
AerotimeInactiveCalendar that kills time fragmentation
AgendaProOtherShopify for Beauty and Wellness businesses in Latam
Alba OrbitalOtherWe make satellites to image everywhere on Earth, every 15 minutes
AlbedoOtherFull-stack VLEO satellite missions
AlltruistsInactiveKid-friendly, at-home volunteer projects in a box, delivered bimonthly
AlpasOtherSoftware for procurement departments to find suppliers 10x faster
AtratoOtherEnabling consumers split the cost of purchases without a credit card
AurabeatOtherProviding clean, safe, virus free air for homes, buildings and cars
AuricleOtherNeurostimulation implant to restore hearing & speech understanding
Avion SchoolInactiveWe teach Filipinos to become remote software engineers globally.
Aviron InteractiveOtherAviron transforms workouts with game-based exercise machines, making…
AwariAcquiredReinventing lifelong learning for the future of work.
Axle HealthOtherScheduling and workforce management SaaS for home healthcare providers
BetterhalfOtherIndia’s first and only marriage super app
BeWell DigitalInactiveBuilding the operating system for diagnosis.
BimaplanOtherAffordable insurance for the next billion Indians
BlinkInactiveSame-day delivery for e-commerce companies in Europe.
BloomOtherInvesting app that teaches you how to invest
boitas.comInactiveLargest B2B eCommerce platform for SMBs in Latin America.
BrioHROtherAll-in-one HR management platform for SMEs
BristleOtherAt-home oral health testing, coaching & care
BroadOtherThe multicurrency account and card for Brazilians
Bueno FinanceAcquiredBuilding Chime for India
CamberOtherAdmin automation for healthcare
CamlistOtherThe super app for pets
Care WeatherOtherThe highest-accuracy global weather data from low-cost flat satellites
CashBookOtherRamp for Indian Businesses - UPI Wallets for Employee Expenses
Charge RunningInactiveProvides live, virtual running classes to runners all around the world
CheqoutInactiveMobile ordering & payments for Brick & Mortars
Chorus SleepOtherMobile app and coaching program that helps employees sleep better
clicOHOtherAmazon-like logistics for e-commerce companies in Latam
CoderhouseOtherEffective and accessible online live education.
ControlHubInactivePurchasing Software | Procure-to-Pay SaaS
CoVerifiedInactiveUsing infection data to keep organizations safe
Dashlabs.aiOtherSoftware for medical laboratories and clinics
DayraOtherData-driven embedded Financial Services for Gig Workers
DjamoOtherChallenger Bank for consumers in French speaking Africa.
DressdInactiveMake infinite $$ off of clothes in your closet without selling them
Eat BlueprintInactiveLongevity Nutrition Service
Entelexo BiotherapeuticsOtherCreating a New Class of Drugs to Address Incurable Autoimmune Diseases
eqtbleAcquiredTurning HR data into actionable insights
FactionInactiveDriverless electric vehicles at a fraction of the cost of a car.
FinantierInactivePlaid for Southeast Asia
FinaryInactiveDiscord for investing.
Finary.comOtherThe new wealth manager for Europe
FinleyAcquiredStreamline your debt capital raise and management
Firstbase.ioOtherThe all-in-one startup operating system
FitHubOtherThe one-stop shop for healthy products
FlextockOtherTech-enabled fulfillment provider in the Middle East & Africa
FlokAcquiredEnd to end company retreat planning
FluxOtherCross border Payments infrastructure for internet businesses and…
Forcyte BiotechnologiesInactiveDiscover drugs that control how much cells "squeeze" to treat disease
FosterOtherA better way to write.
FractionalOtherThe place where motivated investors and entrepreneurs co-own together.
FunctionUp (FanPlay)AcquiredA skill-tech platform that runs placement bootcamps
FurmacyAcquiredDigital e-prescribing software for veterinarians.
gaiiaOtherall-in-one operating system (OS) for telcos
Gerald Technologies, IncOtherBuy Now Pay Later + Cash Advance for Household Essentials
Gigs LiveInactiveVideo publishing and monetization platform for creators and artists
GimBooksOtherGimBooks makes Bookkeeping Easy for small business owners
GoBuild (fka Brick)InactiveThe payments solution for small scale construction.
GonddoInactiveWholesale marketplace for independent retailers buy & manage inventory
Gradia HealthOtherIntegrated, high touch healthcare — at scale
GreaseBossOtherGreaseBoss verifes industrial machinery is greased correctly
GridwareOtherProtecting the grid today, preparing the grid for tomorrow
H3X TechnologiesOtherThe lightest electric aircraft motors in the world.
HapiOtherStocks and cryptos trading app with zero commissions and no minimums…
Hermes RoboticsOtherAutonomous street sweeping as a service by retro-fitting vehicles
HomebaseOtherPersonalized rent-to-own real estate financing using technology in SEA
HoumOtherAll-in-one real estate marketplace for Latin America
Howdy.comOtherWe help US tech companies hire and manage software engineers in LATAM
HuddlefireInactiveTurbocharge customer acquisition through exclusive SaaS partnerships
HuduOtherThe Most-Loved IT Documentation Platform
JetdocsOtherCollaborative ticketing that integrates into Teams and Slack
JigaOtherSource better parts by partnering directly with vetted manufacturers
JoinSubInactiveIndia's first aggregator and provider of local business subscriptions
Juicy MarblesOtherJuicy marbles makes thick juicy and marbled plant based steaks.
KandaOtherAffirm for general contractors
KidatoOtherOnline school for K12 education in Africa
KilobaserOtherDesktop DNA Printer. The Nespresso Machine for DNA.
KiwifyOtherCreate & sell online courses
KodoOtherCorporate card & spend management platform for Indian startups
KrabInactiveInstant loans for trucking companies in India
KrediOtherRocket Mortgage for LatAm.
LalaboxInactiveLive stream shopping for beauty products
Launcher LabsInactiveMaker of consumer crypto apps: Launchcaster, Frameboard, Maindrop
LendflowOtherEmbedded lending infrastructure for software companies
Lion PoseOtherClinical skincare tested on diverse skin, now available in Sephora.
LogicaOtherVisual, collaborative financial modeling software
LovdInactiveIt's not used, it's Lovd.
LyggOtherBuilding New Anti-Aging Ingredients for Skincare
Machine26OtherMarketplace for construction machines
ManaraOtherConnecting top Middle East talent to global tech jobsMarcoPoloInactiveAlibaba for Latin America
MeasuredOtherTelemedicine platform for chronic conditions like obesity
MedMe HealthOtherSoftware for pharmacies to move beyond dispensing
MeetAnywayInactiveWe help run engaging online conferences.
MendelOtherWorkflows to empower employees to spend while finance stay in control
Meru.comOtherThe one-stop-shop for auto-parts in Mexico.
MezliInactiveAutonomous restaurants that make great, affordable meals.
ModernLoopOtherModernLoop helps teams automate and streamline recruiting operations
MonoAcquiredPlaid for Africa, but better.
Moonshot BrandsInactiveBuy and grow profitable e-commerce companies selling on Amazon and DTC
Morada UnoOtherWe underwrite and insure house rentals in Latam
Moxion Power Co.InactiveMobile Energy Storage Technology
My NextDermaOtherDermatology telehealth app for LatAmMythiaInactiveRewards card for gamers
Nano TechnologiesOtherPayroll app to pay workers daily for retailers & manufacturers in SEA
NeverlandInactiveThe first online home garden and lawn marketplace
NextPayOtherThe digital bank for small businesses in the Philippines.
NirvaOtherThe lifestyle medicine layer for clinicians.
NobleInactiveRisk decisioning platform
noHQInactiveInternational contractor and multi country payroll
NourishOtherTelehealth dietitians covered by insurance
NoyaInactiveRadically reducing capital costs and build time for direct air capture
Nuntius TherapeuticsOtherCell-specific genetic medicines
ObservaInactiveCatch accidental database exposures before the bad guys
OctiFiAcquiredBuy Now Pay Later for Southeast Asia
OlaClickOtherRestaurant Solution (E-commerce via WhatsApp + POS + CRM/Marketing)
OntopOtherSimplifying hiring and payments for the global workforce
Orbillion BioAcquiredTasty and scalable cultivated meat at price parity
OutfitInactiveDIY renovations in a box. Materials, tools, and instructions delivered
PagaloopOtherPay, Get Paid and Extend Cash Flow using your Credit Card as…
PartneredAcquiredThe network where sales teams connect to share customer introductions.
peopleCQOtherEmployer backed payroll advances for employees in Egypt
PestoOther
PhoenixOtherCanada's digital health clinic for men
PingPongAcquiredVideo messaging app for remote teams.
PlaymakerInactiveCommunity for fantasy sports players
PoliglotaOtherThe online language school for Latam, with groups led by an instructor
PowerRouterOtherPowerRouter helps sales teams with lead routing in Salesforce
PrekiAcquiredShopify for LatAm
PrendeaInactiveLive afterschool classes for Spanish-speaking kids ages 4 to 15.
ProcotoAcquiredSelf-service RFP management
ProspaOtherBanking for businesses
Pry FinancialsAcquiredFinance for Founders (now at prune.com)
Purpose FinanceInactiveAccelerating the shift to a more transparent economy
QueenlyInactiveLeading marketplace for formalwear
QuotaBookOtherEquity management platform for startups and investors.
R2AcquiredEmbedded lending infrastructure
RecoverOtherGovernment-funded online addiction treatment
Redcliffe LifetechOtherRedcliffe Labs is India's Largest Omni-channel Diagnostics platform
REGENTOtherAll-electric seagliders for fast, affordable regional transportation
RemoraOtherCarbon capture for vehicles
Reshape BiotechOtherRobots that automate the everyday tasks of microbiologists.
ResquaredOtherMarketing automation platform for selling to local businesses.
RethoricOtherLinkedIn content consultancy and scheduling platform for busy founders
ROGEROtherThe Best Way to Sign Contracts Since Handshakes. Roger that.
Roin TechnologiesAcquiredBuilding robots to automate commercial concrete construction.
SeerOtherSell beyond the store.
SendboxOtherFulfillment by Amazon for African merchants
Serna BioOtherGenetic Medicine with Small Molecules
ShepherdOtherModernizing commercial insurance
SoloOtherWe help people resolve debt.
SomosOtherInternet for the urban developing world.
StacksiAcquiredAutomated Answers to Security Questionnaires
StayflexiOtherOperating System for Hotels and Vacation Rentals
Stoke SpaceOtherSeamless mobility to, through, and from space. It starts with 100%…
StrigaAcquiredCompliant Crypto and Banking Infrastructure
Swadesi WayOtherHealthy organic food that creates a positive impact
TasteInactiveOnline marketplace for dinners shipped from great restaurants
TechBizAcquiredMIS on mobile for SMB's in India
TerapifyOtherOnline therapy platform for the Spanish-speaking market
Text BlazeOtherSlash commands anywhere
The Third PlaceOtherSubscriptions for neighborhood businesses
TiltOtherBringing the joy of cycling to millions of Indians
TopkeyOther
TrelaOtherYour one-stop shop to eat well in Brazil
Trestle BiotherapeuticsOtherBioengineered kidneys for patients with kidney failure
TupeloOtherMarketplace for small business M&A
Udhaar AppOtherWe're Khatabook / OkCredit for Pakistan
UnfurlInactiveA virtual food hall that delivers
UnschoolOtherLearn, Intern and become Industry-Ready
UPchieveOtherConnecting low-income HS students with free, 24/7 online tutoring
Valink TherapeuticsOtherDiscovering bispecific antibody drug-conjugates (BsADC) against cancer
Veera HealthOtherWe treat women with Polycystic Ovary Syndrome in India
VendeaseOtherWhere restaurants in Africa buy food supplies
VooshOtherMaking Restaurants more data-driven!
WorksphereAcquiredManage your hybrid workplace
WyndlyOtherLife's better without allergies
YourQuoteInactiveYourQuote is India's largest writing platform
Z1OtherDigital bank for teenagers in LatAm connected to prepaid card
ZealthOtherSoftware for remote monitoring of cancer patients
ZeptoOther10-Minute Grocery Delivery in India
ZiinaOtherA digital wallet for the Middle East & North Africa
zingbusOtherPlatform for bus travel across Indian citiesW21 among all batches
Top tags in W21
- Fintech58
- Developer Tools34
- Marketplace20
- E-commerce19
- Education14
- Consumer14
- Open Source13
- Consumer Health Services13
- Climate13
- eLearning12
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