Top accelerator startups

14,448 startups · 29 programs

YC Winter 2025

166 companies · 84% AI · 13 data · 41 devtools · started Jan 2025

The W25 companies

AISpottAI-native ATS/CRM for recruiting firmsYC W25LeuvenStartup →AISalesPatriotSupply chain superintelligence for distribution and procurementYC W25San FranciscoStartup →AIHarperAI-native commercial insurance brokerageYC W25San FranciscoStartup →AIWeaveAI to understand and then route engineering workYC W25San FranciscoStartup →AIAcquiredZeroEntropyArtificial Specialized IntelligenceYC W25San FranciscoStartup →OtherReditus SpaceReusable SatellitesYC W25AtlantaStartup →OtherSAMMY LabsComputational LawYC W25LondonStartup →AIAfterQueryApplied research lab curating data solutions for foundation model…YC W25San FranciscoStartup →AIHUDPlatform and marketplace for RL environments and AI dataYC W25San FranciscoStartup →OtherForge AutomationSoftware Enabled CNC Parts SupplierYC W25TorontoStartup →AIMercuraAI quote & order processing for technical distributors & manufacturersYC W25BYStartup →AICifratoAI Accountant for Accounting FirmsYC W25BogotáStartup →AIAcquiredBudAgent with a computerYC W25San FranciscoStartup →AIToothy AIAI for insurance verification & billing at dental clinicsYC W25San FranciscoStartup →AICalltreeEnterprise-grade AI support reps for call centersYC W25San FranciscoStartup →OtherInversion SemiconductorManufacturing the most powerful chips, 15x fasterYC W25San FranciscoStartup →AIMastraThe Javascript framework for building AI agents, from the Gatsby devsYC W25San FranciscoStartup →AIMundo AIThe data layer for perceptual intelligenceYC W25VancouverStartup →AIAthenaHQBe the Answer in AI Search - AI SEO across SEO, GEO & AEOYC W25San FranciscoStartup →AIFuse AIAgentic Sales PlatformYC W25San FranciscoStartup →AIClosureWe help law enforcement solve crimeYC W25New York CityStartup →AIHealthKeyAI-powered Patient Identification for Clinical TrialsYC W25AustinStartup →OtherOrbital OperationsHigh Thrust Space Vehicles for Satellite DefenseYC W25Los AngelesStartup →AIProception IncMaking humanoids dexterous enough to thread a needleYC W25San FranciscoStartup →AIYouShiftThe OS for hospital workforce managementYC W25New York CityStartup →AIAsteroidThe integration layer for healthcare: EHRs, payer portals & moreYC W25San FranciscoStartup →AIBindwellDiscovering new pesticides with AIYC W25San FranciscoStartup →AIBild AIAI estimating & detailing for Division 8 doors, frames & hardwareYC W25San FranciscoStartup →AIErgoErgo is the context layer that helps revenue teams close more deals.YC W25San FranciscoStartup →OtherSplash Inc.Autonomous patrol-boats for National SecurityYC W25Los AngelesStartup →AIAcquiredTensorPoolVercel For GPUsYC W25San FranciscoStartup →AIConntourQuery mission-critical videoYC W25Tel Aviv-YafoStartup →AIContrarioAI hiring platform powered by expert recruitersYC W25San FranciscoStartup →AIDelineateAgents for Accelerated Clinical Trial DesignYC W25BostonStartup →AINitrodeFrontier AI research to advance game developmentYC W25San FranciscoStartup →AIOptifye.aiAI performance monitoring for factory workersYC W25New DelhiStartup →AIScoutAI-powered student information system for K-12 schoolsYC W25New York CityStartup →AIWozClaude Code plugin that reduces token consumption and cost by 50%YC W25San FranciscoStartup →AIConfident AIProduction Monitoring & Evals for AI AgentsYC W25San FranciscoStartup →AIArtificial SocietiesFoundational model of human societies for consequential decisionsYC W25LondonStartup →OtherMaritime FusionFusion reactors for shipsYC W25San FranciscoStartup →AIOsmosisReinforcement Learning (RL) for AI AgentsYC W25San FranciscoStartup →Developer toolsPAX MarketsCo-located trading facility and matching engine on one chip.YC W25San FranciscoStartup →AISolidroadAI agents for CX teams, starting with training and QA.YC W25San FranciscoStartup →AITrainLoopReasoning Fine-TuningYC W25San FranciscoStartup →AITrataAI-powered research desk for hedge fundsYC W25New York CityStartup →AIAcquiredEgress HealthAutomated revenue cycle management, starting with dentistsYC W25San FranciscoStartup →AIAxalWe assemble PCBs in under 48 hours for quantities under 10YC W25San FranciscoStartup →AILeaping AIAI voice and texting agentsYC W25San FranciscoStartup →AIBrowser UseAgents that use the browser.YC W25San FranciscoStartup →AIFlowtelThe AI Voice agents for hotelsYC W25San FranciscoStartup →AILiquid ComputePending CFTC regulation to be the first cash and physically settled…YC W25New York CityStartup →AIMosaicFrontier Video AgentsYC W25San FranciscoStartup →AIPromptlessAn AI teammate that automatically updates your customer-facing docsYC W25San FranciscoStartup →OtherSteinmetzNext-Generation Power ElectronicsYC W25San FranciscoStartup →AIEnhanced RadarAI systems for aviationYC W25San FranciscoStartup →AIMentraBuilding the open source smart glasses operating system.YC W25San FranciscoStartup →AICardamonAI compliance co-pilot for regulated financial businessesYC W25LondonStartup →AIAdamAI Powered CADYC W25San FranciscoStartup →AIArtifactAn Collaborative, AI-native IDE for Hardware EngineersYC W25Los AngelesStartup →AIEdexiaAI Teacher Assistant for Grading EssaysYC W25BrisbaneStartup →Developer toolsInfiniteGlobal B2B Stablecoin ProcessorYC W25San FranciscoStartup →AIMisprintMisprint is building Robinhood for Pokemon cardsYC W25New York CityStartup →AIOnlookThe Developer tool for DesignersYC W25San FranciscoStartup →AIPeppr AIIn-call AI teleprompter that helps reps close enterprise dealsYC W25San FranciscoStartup →Developer toolsSubImageThe Open-Core Security GraphYC W25San FranciscoStartup →Developer toolsBlindPayStablecoin API for global paymentsYC W25San FranciscoStartup →AIExin TherapeuticsAgentic platform for predictive neuro drug discovery + data foundry.YC W25San FranciscoStartup →AI10xAI Sales Teams for Dental PracticesYC W25San FranciscoStartup →AIa0.devWe make mobile apps using AI.YC W25San FranciscoStartup →Developer toolsArchonWe help software companies sell to government.YC W25San FranciscoStartup →AICandorProtect your data and stop insider riskYC W25San FranciscoStartup →AIDalusAI-Powered Hardware System Design SoftwareYC W25San FranciscoStartup →AIGaleFast and Data-Driven Immigration PlatformYC W25San FranciscoStartup →OtherLucidinteractive video modelsYC W25San FranciscoStartup →AIMeshEliminating accrual spreadsheets for faster month-endYC W25San FranciscoStartup →AIReboltAgentic AI for aircraft maintenanceYC W25San FranciscoStartup →AIRevise RoboticsAutomating refurbishment of $1T in consumer electronicsYC W25New York CityStartup →OtherOperandA startup in Y Combinator's Winter 2025 batch, based in San Francisco.YC W25San FranciscoStartup →OtherAxiomTrade memecoins, perpetuals, and earn yield.YC W25AustinStartup →AIHey TeloVoice AI for Home ServicesYC W25BYStartup →AIMacadamiaAI Agents for Complex Engineering ProjectsYC W25AmsterdamStartup →AIMiyagi LabsAI tutors for exam prepYC W25New York CityStartup →AIParagonThe AI Growth Engine for IndustrialsYC W25San FranciscoStartup →AIThirdlayerContinual learning for enterprise AIYC W25San FranciscoStartup →AIawenawen translates intent into exceptional visuals through conversationYC W25ParisStartup →AIOkiThe memory computer for your digital life.YC W25San FranciscoStartup →AIPickleThe personal AI agent network for AsiaYC W25San FranciscoStartup →AIsuperglueAI agents that run ERP implementations for consultantsYC W25BYStartup →AIVetnioAI Copilot that automates admin work for veterinary professionalsYC W25StockholmStartup →AIAlice.techAI-driven exam prepYC W25CopenhagenStartup →AIcareCycleVoice AI teams for medicare agencies.YC W25San FranciscoStartup →OtherInstinct SpaceBuilding lunar landersYC W25LondonStartup →AIRallyFinancial OS for Modern FleetsYC W25BerlinStartup →OtherRed Barn RoboticsA Roomba for weeds on a farm.YC W25SeattleStartup →AISherpa LabsFrontier DataYC W25San FranciscoStartup →AIVantelAI Platform for Commercial Insurance BrokeragesYC W25StockholmStartup →AIBluebookAI for accountingYC W25StockholmStartup →OtherBystreetConnect with hoteliers around the world.YC W25San FranciscoStartup →AICopyCat AIAI for Commercial Insurance AgenciesYC W25SeattleStartup →
Company
SpottAI-native ATS/CRM for recruiting firmsteam of 50on 4 Glyph sourcesActiveAI
SalesPatriotSupply chain superintelligence for distribution and procurementteam of 302 programsActiveAI
HarperAI-native commercial insurance brokerageteam of 252 programsActiveAI
WeaveAI to understand and then route engineering workteam of 16on 3 Glyph sourcesActiveAI, Data, Devtools
ZeroEntropyArtificial Specialized Intelligenceteam of 6acquiredAcquiredAI, Devtools
Reditus SpaceReusable Satellitesteam of 122 programsActiveOther
SAMMY LabsComputational Lawteam of 102 programsActiveOther
AfterQueryApplied research lab curating data solutions for foundation model…team of 30hiringActiveAI, Data, Devtools
HUDPlatform and marketplace for RL environments and AI datateam of 24hiringActiveAI, Devtools
Forge AutomationSoftware Enabled CNC Parts Supplierteam of 21hiringActiveOther
MercuraAI quote & order processing for technical distributors & manufacturersteam of 20hiringActiveAI
CifratoAI Accountant for Accounting Firmsteam of 17hiringActiveAI
BudAgent with a computerteam of 6acquiredAcquiredAI
Toothy AIAI for insurance verification & billing at dental clinicsteam of 15hiringActiveAI
CalltreeEnterprise-grade AI support reps for call centersteam of 14hiringActiveAI
Inversion SemiconductorManufacturing the most powerful chips, 15x fasterteam of 92 programsActiveOther
MastraThe Javascript framework for building AI agents, from the Gatsby devsteam of 30ActiveAI, Devtools
Mundo AIThe data layer for perceptual intelligenceteam of 30ActiveAI, Devtools
AthenaHQBe the Answer in AI Search - AI SEO across SEO, GEO & AEOteam of 12hiringActiveAI
Fuse AIAgentic Sales Platformteam of 12hiringActiveAI
ClosureWe help law enforcement solve crimeteam of 11hiringActiveAI
HealthKeyAI-powered Patient Identification for Clinical Trialsteam of 10hiringActiveAI
Orbital OperationsHigh Thrust Space Vehicles for Satellite Defenseteam of 10hiringActiveOther
Proception IncMaking humanoids dexterous enough to thread a needleteam of 10hiringActiveAI
YouShiftThe OS for hospital workforce managementteam of 10hiringActiveAI
AsteroidThe integration layer for healthcare: EHRs, payer portals & moreteam of 62 programsActiveAI
BindwellDiscovering new pesticides with AIteam of 24ActiveAI
Bild AIAI estimating & detailing for Division 8 doors, frames & hardwareteam of 9hiringActiveAI
ErgoErgo is the context layer that helps revenue teams close more deals.team of 9hiringActiveAI
Splash Inc.Autonomous patrol-boats for National Securityteam of 9hiringActiveOther
TensorPoolVercel For GPUsacquiredteam of 3AcquiredAI, Devtools
ConntourQuery mission-critical videoteam of 20ActiveAI
ContrarioAI hiring platform powered by expert recruitersteam of 20ActiveAI
DelineateAgents for Accelerated Clinical Trial Designteam of 20ActiveAI, Devtools
NitrodeFrontier AI research to advance game developmentteam of 8hiringActiveAI, Data
Optifye.aiAI performance monitoring for factory workersteam of 8hiringActiveAI
ScoutAI-powered student information system for K-12 schoolsteam of 8hiringActiveAI
WozClaude Code plugin that reduces token consumption and cost by 50%team of 8hiringActiveAI
Confident AIProduction Monitoring & Evals for AI Agentsteam of 7hiringActiveAI, Devtools
Artificial SocietiesFoundational model of human societies for consequential decisionsteam of 18ActiveAI, Data
Maritime FusionFusion reactors for shipsteam of 6hiringActiveOther
OsmosisReinforcement Learning (RL) for AI Agentsteam of 6hiringActiveAI, Devtools
PAX MarketsCo-located trading facility and matching engine on one chip.team of 6hiringActiveDevtools
SolidroadAI agents for CX teams, starting with training and QA.team of 6hiringActiveAI
TrainLoopReasoning Fine-Tuningteam of 6hiringActiveAI, Devtools
TrataAI-powered research desk for hedge fundsteam of 6hiringActiveAI
Egress HealthAutomated revenue cycle management, starting with dentistsacquiredteam of 2AcquiredAI
AxalWe assemble PCBs in under 48 hours for quantities under 10team of 32 programsActiveAI
Leaping AIAI voice and texting agentsteam of 13ActiveAI
Browser UseAgents that use the browser.team of 5hiringActiveAI, Devtools
FlowtelThe AI Voice agents for hotelsteam of 5hiringActiveAI
Liquid ComputePending CFTC regulation to be the first cash and physically settled…team of 5hiringActiveAI, Devtools
MosaicFrontier Video Agentsteam of 5hiringActiveAI
PromptlessAn AI teammate that automatically updates your customer-facing docsteam of 5hiringActiveAI, Devtools
SteinmetzNext-Generation Power Electronicsteam of 5hiringActiveOther
Enhanced RadarAI systems for aviationteam of 12ActiveAI
MentraBuilding the open source smart glasses operating system.team of 12ActiveAI, Devtools
CardamonAI compliance co-pilot for regulated financial businessesteam of 11ActiveAI
AdamAI Powered CADteam of 4hiringActiveAI, Devtools
ArtifactAn Collaborative, AI-native IDE for Hardware Engineersteam of 4hiringActiveAI
EdexiaAI Teacher Assistant for Grading Essaysteam of 4hiringActiveAI
InfiniteGlobal B2B Stablecoin Processorteam of 4hiringActiveDevtools
MisprintMisprint is building Robinhood for Pokemon cardsteam of 4hiringActiveAI
OnlookThe Developer tool for Designersteam of 4hiringActiveAI, Devtools
Peppr AIIn-call AI teleprompter that helps reps close enterprise dealsteam of 4hiringActiveAI
SubImageThe Open-Core Security Graphteam of 4hiringActiveDevtools
BlindPayStablecoin API for global paymentsteam of 9ActiveDevtools
Exin TherapeuticsAgentic platform for predictive neuro drug discovery + data foundry.team of 9ActiveAI
10xAI Sales Teams for Dental Practicesteam of 3hiringActiveAI, Data
a0.devWe make mobile apps using AI.team of 3hiringActiveAI, Devtools
ArchonWe help software companies sell to government.team of 3hiringActiveDevtools
CandorProtect your data and stop insider riskteam of 3hiringActiveAI
DalusAI-Powered Hardware System Design Softwareteam of 3hiringActiveAI
GaleFast and Data-Driven Immigration Platformteam of 3hiringActiveAI
Lucidinteractive video modelsteam of 3hiringActiveOther
MeshEliminating accrual spreadsheets for faster month-endteam of 3hiringActiveAI
ReboltAgentic AI for aircraft maintenanceteam of 3hiringActiveAI
Revise RoboticsAutomating refurbishment of $1T in consumer electronicsteam of 3hiringActiveAI
OperandA startup in Y Combinator's Winter 2025 batch, based in San Francisco.team of 8ActiveOther
AxiomTrade memecoins, perpetuals, and earn yield.team of 2hiringActiveOther
Hey TeloVoice AI for Home Servicesteam of 2hiringActiveAI
MacadamiaAI Agents for Complex Engineering Projectsteam of 2hiringActiveAI
Miyagi LabsAI tutors for exam prepteam of 2hiringActiveAI
ParagonThe AI Growth Engine for Industrialsteam of 2hiringActiveAI
ThirdlayerContinual learning for enterprise AIteam of 2hiringActiveAI
awenawen translates intent into exceptional visuals through conversationteam of 6ActiveAI
OkiThe memory computer for your digital life.team of 6ActiveAI
PickleThe personal AI agent network for Asiateam of 6ActiveAI
superglueAI agents that run ERP implementations for consultantsteam of 6ActiveAI
VetnioAI Copilot that automates admin work for veterinary professionalsteam of 6ActiveAI
Alice.techAI-driven exam prepteam of 5ActiveAI
careCycleVoice AI teams for medicare agencies.team of 5ActiveAI
Instinct SpaceBuilding lunar landersteam of 5ActiveOther
RallyFinancial OS for Modern Fleetsteam of 5ActiveAI
Red Barn RoboticsA Roomba for weeds on a farm.team of 5ActiveOther
Sherpa LabsFrontier Datateam of 5ActiveAI, Data
VantelAI Platform for Commercial Insurance Brokeragesteam of 5ActiveAI
BluebookAI for accountingteam of 4ActiveAI
BystreetConnect with hoteliers around the world.team of 4ActiveOther
CopyCat AIAI for Commercial Insurance Agenciesteam of 4ActiveAI

About W25

Every company, one tile each

By category

W25 by category

Where are they now

W25 by status

Top tags in W25

  • Developer Tools18
  • Generative AI16
  • Fintech11
  • Sales10
  • Hardware9
  • Consumer8
  • Health Tech7
  • Open Source7
  • Infrastructure7
  • Healthcare6