Top accelerator startups

14,448 startups · 29 programs

YC Spring 2025

144 companies · 90% AI · 14 data · 51 devtools · started Apr 2025

The X25 companies

AINaïveAutonomous Company InfrastructureYC X25San FranciscoStartup →AIMorphoAISoftware tool for designing robots and machinesYC X25New York CityStartup →AIAcquiredBlaxelThe infrastructure for autonomous agentsYC X25San FranciscoStartup →AIAuctorThe agentic operating system for modern system integrators.YC X25New York CityStartup →AISynthio LabsAgentic AI platform for Pharma GTM teamsYC X25San FranciscoStartup →AIMbodi AIIndustrial Robots that Learn and Operate Like HumansYC X25New York CityStartup →AIthroxyVertical AI agents running B2B outbound on autopilot, with human SDRsYC X25LondonStartup →AIEloquent AIThe AI Operator for Financial ServicesYC X25San FranciscoStartup →AIThird ChairAI-Native IP EnforcementYC X25San FranciscoStartup →AILucisFunction Health for EuropeYC X25ParisStartup →AILapelInfrastructure to power every customer interaction.YC X25San FranciscoStartup →OtherQFEX24/7 Global Stock ExchangeYC X25LondonStartup →AISixtyfourIntelligence Infrastructure on People and EntitiesYC X25San FranciscoStartup →AIBluejayTest, monitor, and improve your voice and chat AI agentsYC X25San FranciscoStartup →AICascoAutonomous security testing for web apps, APIs, cloud, and AI systemsYC X25Startup →AIGodelaAI Physics Engine to replace simulations and prototypesYC X25San FranciscoStartup →AIQualGentAI Mobile App Quality Assurance TesterYC X25San FranciscoStartup →AISimBuild autonomous AI agents for enterprise systemsYC X25San FranciscoStartup →AIVesenceThe Agent-Native ComputerYC X25San FranciscoStartup →AILinewiseIndustrial data layer for physical RSIYC X25San FranciscoStartup →AITicket WalletAI-optimized ticket resaleYC X25New York CityStartup →AIBesimple AIVoice data for AIYC X25San FranciscoStartup →AICotoolSecurity operations optimized for agents.YC X25San FranciscoStartup →AIGroundControlVertical AI for highly-regulated manufacturingYC X25San FranciscoStartup →AIAirweaveThe open-source context retrieval layer for agentsYC X25San FranciscoStartup →AIAvallon AIAI agents for insurance claims operationsYC X25New York CityStartup →OtherCascade SpaceCommercial alternative to the Deep Space NetworkYC X25San FranciscoStartup →AIMesmerWe build software factories for engineering teamsYC X25BerlinStartup →AIWillowThe voice interface replacing your keyboardYC X25San FranciscoStartup →AIAcquiredGalen AIPersonal AI healthcare agent, powered by clinical and wearable data.YC X25San FranciscoStartup →AIAcquiredKirana AIAI manager for physical storesYC X25New York CityStartup →AIAcquiredPropolisHands off QA via intelligent browser agents.YC X25New York CityStartup →AIAlmondAmerica's robot factoryYC X25San FranciscoStartup →AIClaim HealthAI Revenue Platform for Post-Acute CareYC X25New York CityStartup →AIcubicAI-powered code review platformYC X25LondonStartup →AIKaizenAutomate anything on the web.YC X25San FranciscoStartup →AIMindFortAutonomous Security SwarmsYC X25Los AngelesStartup →AINovoflowComputer-using agents for healthcare operationsYC X25San FranciscoStartup →AIParsewiseMulti-document processing for your risk teams, AI agents, pipelinesYC X25LondonStartup →AIAdentrisReal-time AI Compliance & Revenue Integrity for Medical ProvidersYC X25San FranciscoStartup →OtherFoundation IndustriesWe supply hard tech companies with critical components.YC X25San FranciscoStartup →AIKlavis AIRL environments and training data for frontier AI labsYC X25Startup →AILumariAI Digital Workers for Supply ChainYC X25San FranciscoStartup →AIPhotoniumAI-Powered Optical Consulting & SoftwareYC X25New York CityStartup →Developer toolsAravoltaSoftware to monitor, control, and optimize data centers.YC X25IndianapolisStartup →AIText.aiAlfi - your group chat with social skills to bring friends closerYC X25San FranciscoStartup →AITheoremProgram verification so even your systems engineers can vibecodeYC X25San FranciscoStartup →AIAttuneFaster builds, zero effort.YC X25San FranciscoStartup →AIBondYour AI Chief of StaffYC X25San FranciscoStartup →AICode FourModernizing the police workflow.YC X25San FranciscoStartup →AICuaGive every agent a cloud desktopYC X25San FranciscoStartup →AIHemutAI-powered operating system for trucking companies.YC X25FresnoStartup →AIJeevy FabricationAI Driven EPC - Weld Fabrication ContractorYC X25CleburneStartup →AILeerooAI Building AI For EnterpriseYC X25LondonStartup →DataPgDogScaling engine for PostgreSQLYC X25San FranciscoStartup →AIScalar FieldYour Agentic Trading Desk, Building the next era of agentic…YC X25Startup →AICombinelyAI Coworker for AccountantsYC X25LondonStartup →AIKaelioThe open-source context layer for data agentsYC X25Startup →Developer toolsRefreshTraining gyms for computer use and software engineering workYC X25San FranciscoStartup →AIVybeSecure internal apps. Built by AI in seconds. Powered by your data.YC X25San FranciscoStartup →AICrimsonThe AI Associate for Litigation LawyersYC X25LondonStartup →AIThetaSpecialized AI for Every JobYC X25San FranciscoStartup →AIHelixDBThe fastest & most scalable graph-vector database on the marketYC X25LondonStartup →AILabricThe data layer for scientific researchYC X25San FranciscoStartup →OtherProboWe help you get compliant while you focus on your business.YC X25San FranciscoStartup →AIAlkaliThe smarter way to estimate steel.YC X25HoustonStartup →AIChestnutThe first AI mortgage lenderYC X25San FranciscoStartup →AIOpusense AIAI for Field Inspection ReportsYC X25TorontoStartup →AIPlexeOpen-source agents to build predictive ML models from a promptYC X25LondonStartup →AIRaloAI-Native Mortgage BrokerYC X25New York CityStartup →OtherVoiceOSSay it and it's done. Voice is the new OSYC X25San FranciscoStartup →AIchrtchrt is a logistics platform for time-critical shippingYC X25San ClementeStartup →AIClideyTurn scattered data into one platform for decision-makingYC X25San FranciscoStartup →AIMinervaAI native financial institutionYC X25San FranciscoStartup →AINomiRealtime Sales CopilotYC X25San FranciscoStartup →AIPelicaAI agents for risk-bearing healthcare organizationsYC X25San FranciscoStartup →AITinfoilEncrypted AI with verifiable privacyYC X25San FranciscoStartup →AIZeon SystemsAI-powered robotics for scientific lab automation.YC X25San FranciscoStartup →AIAcquiredBitPatrolAI-powered code securityYC X25New York CityStartup →Developer toolsBetter AuthThe authentication framework for TypeScriptYC X25San FranciscoStartup →AIFreesoloProduct Native ModelsYC X25San FranciscoStartup →AIMoby AnalyticsAI financial auditorsYC X25ParisStartup →AIRimbaStreamlining Data Capture to Report Creation for Heavy IndustriesYC X25San FranciscoStartup →AISureformReal-world company data for frontier AIYC X25San FranciscoStartup →AIAcoliteAI Native Commercial Insurance BrokerYC X25PhiladelphiaStartup →AIAegisAI Agents to win denied health insurance claims.YC X25San FranciscoStartup →OtherAtum WorksGigascale NanomanufacturingYC X25San FranciscoStartup →AIBelugaCreator marketing that scales like paid adsYC X25San FranciscoStartup →AIFeynCustom models trained on your dataYC X25San FranciscoStartup →AIHuman BehaviorUnderstand your users beyond the numbersYC X25San FranciscoStartup →AIIRBCAI-native financial institution for global businesses + agents.YC X25New York CityStartup →AIKairosSpecialized AI for Critical IndustriesYC X25San FranciscoStartup →AIKestralWe automate your entire product development lifecycle.YC X25San FranciscoStartup →AINimbic AIAutomatically write and update internal docs with every code commit.YC X25San FranciscoStartup →AIOrchidA personal EA in your iMessageYC X25San FranciscoStartup →AIPaper InstrumentsOpen-source frontier models for knowledge workYC X25San FranciscoStartup →AIStarSlingAgent-native GitHub Actions runnersYC X25San FranciscoStartup →AIWavedashPlay the latest games in your browser with no downloadsYC X25Los AngelesStartup →AIYouLearnAI tutor for each student.YC X25San FranciscoStartup →AIAnanaAI Workspace for Hospitality Commercial TeamsYC X25New York CityStartup →
Company
NaïveAutonomous Company Infrastructureteam of 12on 4 Glyph sourcesActiveAI, Devtools
MorphoAISoftware tool for designing robots and machinesteam of 122 programsActiveAI
BlaxelThe infrastructure for autonomous agentsteam of 12acquiredAcquiredAI, Devtools
AuctorThe agentic operating system for modern system integrators.team of 30hiringActiveAI
Synthio LabsAgentic AI platform for Pharma GTM teamsteam of 29hiringActiveAI
Mbodi AIIndustrial Robots that Learn and Operate Like Humansteam of 62 programsActiveAI
throxyVertical AI agents running B2B outbound on autopilot, with human SDRsteam of 55ActiveAI
Eloquent AIThe AI Operator for Financial Servicesteam of 52 programsActiveAI
Third ChairAI-Native IP Enforcementteam of 19hiringActiveAI
LucisFunction Health for Europeteam of 17hiringActiveAI
LapelInfrastructure to power every customer interaction.team of 14hiringActiveAI
QFEX24/7 Global Stock Exchangeteam of 14hiringActiveOther
SixtyfourIntelligence Infrastructure on People and Entitiesteam of 12hiringActiveAI, Devtools
BluejayTest, monitor, and improve your voice and chat AI agentsteam of 10hiringActiveAI
CascoAutonomous security testing for web apps, APIs, cloud, and AI systemsteam of 10hiringActiveAI, Devtools
GodelaAI Physics Engine to replace simulations and prototypesteam of 10hiringActiveAI, Devtools
QualGentAI Mobile App Quality Assurance Testerteam of 10hiringActiveAI
SimBuild autonomous AI agents for enterprise systemsteam of 10hiringActiveAI
VesenceThe Agent-Native Computerteam of 10hiringActiveAI
LinewiseIndustrial data layer for physical RSIteam of 25ActiveAI, Data
Ticket WalletAI-optimized ticket resaleteam of 20ActiveAI
Besimple AIVoice data for AIteam of 8hiringActiveAI, Data
CotoolSecurity operations optimized for agents.team of 8hiringActiveAI
GroundControlVertical AI for highly-regulated manufacturingteam of 8hiringActiveAI
AirweaveThe open-source context retrieval layer for agentsteam of 7hiringActiveAI, Devtools
Avallon AIAI agents for insurance claims operationsteam of 7hiringActiveAI
Cascade SpaceCommercial alternative to the Deep Space Networkteam of 7hiringActiveOther
MesmerWe build software factories for engineering teamsteam of 7hiringActiveAI, Devtools
WillowThe voice interface replacing your keyboardteam of 7hiringActiveAI
Galen AIPersonal AI healthcare agent, powered by clinical and wearable data.acquiredteam of 2AcquiredAI
Kirana AIAI manager for physical storesacquiredteam of 2AcquiredAI
PropolisHands off QA via intelligent browser agents.acquiredteam of 2AcquiredAI
AlmondAmerica's robot factoryteam of 6hiringActiveAI
Claim HealthAI Revenue Platform for Post-Acute Careteam of 6hiringActiveAI
cubicAI-powered code review platformteam of 6hiringActiveAI, Devtools
KaizenAutomate anything on the web.team of 6hiringActiveAI
MindFortAutonomous Security Swarmsteam of 6hiringActiveAI, Devtools
NovoflowComputer-using agents for healthcare operationsteam of 6hiringActiveAI
ParsewiseMulti-document processing for your risk teams, AI agents, pipelinesteam of 6hiringActiveAI, Devtools
AdentrisReal-time AI Compliance & Revenue Integrity for Medical Providersteam of 5hiringActiveAI
Foundation IndustriesWe supply hard tech companies with critical components.team of 5hiringActiveOther
Klavis AIRL environments and training data for frontier AI labsteam of 5hiringActiveAI
LumariAI Digital Workers for Supply Chainteam of 5hiringActiveAI
PhotoniumAI-Powered Optical Consulting & Softwareteam of 5hiringActiveAI, Devtools
AravoltaSoftware to monitor, control, and optimize data centers.team of 4hiringActiveDevtools
Text.aiAlfi - your group chat with social skills to bring friends closerteam of 4hiringActiveAI
TheoremProgram verification so even your systems engineers can vibecodeteam of 4hiringActiveAI, Devtools
AttuneFaster builds, zero effort.team of 3hiringActiveAI, Devtools
BondYour AI Chief of Staffteam of 3hiringActiveAI
Code FourModernizing the police workflow.team of 3hiringActiveAI
CuaGive every agent a cloud desktopteam of 3hiringActiveAI, Devtools
HemutAI-powered operating system for trucking companies.team of 3hiringActiveAI
Jeevy FabricationAI Driven EPC - Weld Fabrication Contractorteam of 3hiringActiveAI
LeerooAI Building AI For Enterpriseteam of 3hiringActiveAI
PgDogScaling engine for PostgreSQLteam of 3hiringActiveData, Devtools
Scalar FieldYour Agentic Trading Desk, Building the next era of agentic…team of 3hiringActiveAI
CombinelyAI Coworker for Accountantsteam of 8ActiveAI
KaelioThe open-source context layer for data agentsteam of 8ActiveAI, Devtools
RefreshTraining gyms for computer use and software engineering workteam of 8ActiveDevtools
VybeSecure internal apps. Built by AI in seconds. Powered by your data.team of 8ActiveAI, Devtools
CrimsonThe AI Associate for Litigation Lawyersteam of 7ActiveAI
ThetaSpecialized AI for Every Jobteam of 7ActiveAI
HelixDBThe fastest & most scalable graph-vector database on the marketteam of 6ActiveAI, Data, Devtools
LabricThe data layer for scientific researchteam of 6ActiveAI, Data
ProboWe help you get compliant while you focus on your business.team of 6ActiveOther
AlkaliThe smarter way to estimate steel.team of 2hiringActiveAI, Devtools
ChestnutThe first AI mortgage lenderteam of 2hiringActiveAI
Opusense AIAI for Field Inspection Reportsteam of 2hiringActiveAI
PlexeOpen-source agents to build predictive ML models from a promptteam of 2hiringActiveAI, Data, Devtools
RaloAI-Native Mortgage Brokerteam of 2hiringActiveAI
VoiceOSSay it and it's done. Voice is the new OSteam of 2hiringActiveOther
chrtchrt is a logistics platform for time-critical shippingteam of 5ActiveAI
ClideyTurn scattered data into one platform for decision-makingteam of 5ActiveAI, Devtools
MinervaAI native financial institutionteam of 5ActiveAI
NomiRealtime Sales Copilotteam of 5ActiveAI
PelicaAI agents for risk-bearing healthcare organizationsteam of 5ActiveAI
TinfoilEncrypted AI with verifiable privacyteam of 5ActiveAI, Devtools
Zeon SystemsAI-powered robotics for scientific lab automation.team of 5ActiveAI
BitPatrolAI-powered code securityacquiredAcquiredAI, Devtools
Better AuthThe authentication framework for TypeScriptteam of 4ActiveDevtools
FreesoloProduct Native Modelsteam of 4ActiveAI, Devtools
Moby AnalyticsAI financial auditorsteam of 4ActiveAI
RimbaStreamlining Data Capture to Report Creation for Heavy Industriesteam of 4ActiveAI
SureformReal-world company data for frontier AIteam of 4ActiveAI, Data
AcoliteAI Native Commercial Insurance Brokerteam of 3ActiveAI
AegisAI Agents to win denied health insurance claims.team of 3ActiveAI
Atum WorksGigascale Nanomanufacturingteam of 3ActiveOther
BelugaCreator marketing that scales like paid adsteam of 3ActiveAI
FeynCustom models trained on your datateam of 3ActiveAI, Devtools
Human BehaviorUnderstand your users beyond the numbersteam of 3ActiveAI, Data, Devtools
IRBCAI-native financial institution for global businesses + agents.team of 3ActiveAI
KairosSpecialized AI for Critical Industriesteam of 3ActiveAI, Devtools
KestralWe automate your entire product development lifecycle.team of 3ActiveAI
Nimbic AIAutomatically write and update internal docs with every code commit.team of 3ActiveAI, Devtools
OrchidA personal EA in your iMessageteam of 3ActiveAI
Paper InstrumentsOpen-source frontier models for knowledge workteam of 3ActiveAI
StarSlingAgent-native GitHub Actions runnersteam of 3ActiveAI, Devtools
WavedashPlay the latest games in your browser with no downloadsteam of 3ActiveAI
YouLearnAI tutor for each student.team of 3ActiveAI
AnanaAI Workspace for Hospitality Commercial Teamsteam of 2ActiveAI

About X25

Every company, one tile each

By category

X25 by category

Where are they now

X25 by status

Top tags in X25

  • Developer Tools20
  • Infrastructure9
  • Machine Learning9
  • Manufacturing9
  • Consumer9
  • Robotics8
  • Enterprise Software8
  • Healthcare6
  • Sales6
  • Hard Tech6