Y Combinator Summer 2025
2025
166 companies in Y Combinator Summer 2025. Biggest markets: AI for Financial & Compliance Ops (24), AI Data & Model Infrastructure (22), Agent Infrastructure & Orchestration (21). Each with its founders and the page its membership is read from.
AcrelyPittsburgh, PA, USAEnterprise Voice Agents
AdaptionalSan Francisco, CA, USAAI-powered insurance claims review
AgentMailSan Francisco, CA, USAEmail Inboxes for AI Agents

Procurement Platform for Dental Offices
Albacore Inc.Philadelphia, PA, USADrone submarines
AlterNew York City, NY, USASecure access control and authorization platform for agent workflows
AlturMexico City, CDMX, MexicoVoice AI Agents for Debt Collection
AmbralNew York City, NY, USAAI for account management and customer success

AstorSan Francisco, CA, USAAI advisor for retail investors
AutosanaSan Francisco, CA, USAAI agents for E2E testing across mobile & web
AutumnLondon, England, United KingdomBilling infrastructure for AI

We audit medical claims for self-insured employers and health plans.
AventSan Francisco, CA, USAAI agents for industrial commerce
b12 LabsSan Francisco, CA, USAMaking hard molecules for Pharma and Biotech
bitrigSan Francisco, CA, USAVibe code, test, and deploy Swift apps. All from your iPhone.

Blank BioSan Francisco, CA, USARNA intelligence for precision medicine
BlueSan Francisco, CA, USAYour phone finally has someone to run it. Plug in Blue, just ask.
BootLoopSan Francisco, CA, USAFirmware in minutes, not months - rigorously tested on real hardware
burntSan Francisco, CA, USAAgentic Operating System for Food Supply Chain
CactusSan Francisco, CA, USALow-latency AI engine for mobile devices & wearables
CareSwiftNew York City, NY, USAAI scribe for Ambulance Reports
Certus AISan Francisco, CA, USAReplacing the restaurant phone line with Voice AI
Channel3New York City, NY, USADatabase of every product on the internet
CharSeoul, Seoul, South KoreaThe AI notepad that knows and works for you
CLODOSan Francisco, CA, USAPlanet-scale people discovery.
CloseraNew York City, NY, USAAI Shopping Agent for Your Ecommerce Store
cocreateSan Francisco, CA, USAvideo production software
ComenaBY, GermanyAI agents for distributors and manufacturers to automate order entry.
ContextFortSan Francisco, CA, USAVisibility and Controls for Browser Agents
ConvexiaSan Francisco, CA, USAThe world's first AI-maximalist pharma company
CostreamLos Angeles, CA, USAIndexing human dialogue through digital products
CyberdeskSan Francisco, CA, USASelf learning computer use agent for developers
DatafruitSan Francisco, CA, USAThe AI workspace for software implementations
Dedalus LabsSan Francisco, CA, USACompute substrate for AI agents
DeepAware AI (Robotics Center of Silicon Valley)San Francisco, CA, USARobots, parts & RL envs & evals - delivered in 48 hrs / pickup in SF.
DeepGroveSan Francisco, CA, USAFrontier Intelligence. On Any Device.
Design ArenaSan Francisco, CA, USAWorld's largest crowdsourced benchmark for AI-generated design
DoeSan Francisco, CA, USAThe boring stuff, handled. Everything else, supercharged.
DuraniumSan Francisco, CA, USAReshoring critical metal production
EffiGovSan Francisco, CA, USAThe AI OS for Cities
EmbedderSan Francisco, CA, USAHardware-Aware AI for Embedded Software Development
EpicenterSan Francisco, CA, USAChatGPT's memory feature in an open, portable format
F2New York City, NY, USAThe AI platform for private markets investors
F4 IndustriesSan Francisco, CA, USAThe GD&T Analysis Platform for Engineering Drawings
FintoMunich, BY, GermanyAI accounting for enterprise finance teams
FlaiSan Francisco, CA, USAWe Bring Customers to Your Dealership
FleetlineNew York City, NY, USAOptimizing fleet planning with data driven algorithms
FlootSan Francisco, CA, USAThe easiest way for non-coders to build apps with AI.

FreyaSan Francisco, CA, USAVoice AI for Enterprises

FulcrumSan Francisco, CA, USAThe agentic debugger for AI systems
GETASAPSan Francisco, CA, USAAI-Native Fresh Produce Logistics

GolpoSan Francisco, CA, USACreate Whiteboard Explainer Videos with AI from a Prompt or Document
HalluminateSan Francisco, CA, USAData and RL environments to automate knowledge work
HeraBerlin, Berlin, GermanyAI Motion Designer
HumoniqSan Francisco, CA, USAAI-Native BPO for travel & transport
IdlerSan Francisco, CA, USAReinforcement learning environments.
ImpreziaSan Francisco, CA, USAThe World's First AI Ad Network.
InterfaceNew York City, NY, USABuilding onestop.sh
InterfereNew York City, NY, USAGive engineering, product, and design teams insight into unseen issues
Iron GridSan Francisco, CA, USAFoundational models for risk and quality.
IronLedger.aiNew York City, NY, USAAI-enabled Corporate Cards and Invoice Processing for Real Estate
Janet AISan Francisco, CA, USAThe Autonomous Product Management System
JuxtaSan Francisco, CA, USABuilding a GPS alternative 100x more powerful with no hardware needed.
KalindaSan Francisco, CA, USADeep research for class action law firms
KERNELSan Francisco, CA, USACrazy fast, open source infra for AI agents to use the Internet
KestrollSan Francisco, CA, USA
KnowlifySan Francisco, CA, USAThe AI Explainer Video Maker
LanesurfSan Francisco, CA, USABook any load in 10 minutes
LarkSan Francisco, CA, USAThe E2E testing layer for AI-driven development
LilacSan Francisco, CA, USA; RemoteWe automatically monetize idle GPUs

LLM StatsNew York City, NY, USAIndependent AI evaluations lab
LocataNew York City, NY, USAAI Referral Automation for Primary Care Clinics
LotasSan Francisco, CA, USAAI for quantitative trading
LuminalSan Francisco, CA, USAMaking AI run fast on any hardware.
MagneticSan Francisco, CA, USAAI Tax Preparer for CPA firms
MagnitudeSan Francisco, CA, USACode with local models, zero setup
MangoDeskSan Francisco, CA, USALong-horizon RL environments
ManufactSan Francisco, CA, USACloud infrastructure for MCP servers and Claude / ChatGPT apps.
MaximalSan Francisco, CA, USATruckload Planning at Machine Precision
MeteorSan Francisco, CA, USAAn AI-Native Browser

Infrastructure to build reliable agents

Minimal AIAmsterdam, NH, NetherlandsAI Agents for E-commerce Customer Support
ModelenceSan Francisco, CA, USA; RemoteBuild production-ready apps with AI
MonarchaSan Francisco, CA, USATurn maps into data
MonteSan Francisco, CA, USAContinual Learning for Agents
MotivesLondon, England, United KingdomConsumer focus groups run by AI
MunifyOrlando, FL, USA; RemoteThe Cross-Border Neobank for the Middle East
NautilusSan Francisco, CA, USAAI platform to grow and to optimize car washes

Implantable microchips and AI for cattle monitoring
NixoSan Francisco, CA, USADeployment intelligence for forward deployed engineers
NormalSan Francisco, CA, USATesting and certifying the hardware of the future
NOSO LABSSan Francisco, CA, USABuild AI agents for field technicians to diagnose and sell 10x better
NotteSan Francisco, CA, USAReliable Web Agents for Enterprise
NovaflowSan Francisco, CA, USAThe AI data analyst for biology labs
Nox MetalsDetroit, MI, USASupplying America's Industrial Base
NozomioSan Francisco, CA, USAproduct lab solving context in ai

OkibiSan Francisco, CA, USATurns products into CLIs and agents into customers
OmnaraSan Francisco, CA, USAThe Control Plane for Agents
OnDeck AIVancouver, BC, CanadaAnalyze any footage, without training a model

The notebook that thinks with you.
Orange SliceSan Francisco, CA, USAAgentic sales enrichment spreadsheet
PallySan Francisco, CA, USAYour personal AI Assistant
PalomaSan Francisco, CA, USADigital transformation for real economy businesses

PangolinNew York City, NY, USAIdentity-aware VPN and proxy for remote access to anything, anywhere.
PanoptiveSan Francisco, CA, USAThe continuous oversight engine for clinical trials
ParachuteNew York City, NY, USA
PARES AILos Angeles, CA, USAAI-native real estate services firm
Perseus DefenseAustin, TX, USAAmerica's Golden Dome for Drones
Perspectives HealthChicago, IL, USAAI to run behavioral health programs better
PhasesSan Francisco, CA, USAAutomated clinical trial oversight and execution
Physical TuringSan Francisco, CA, USAEvaluating humanoids in the real world
PingoSan Francisco, CA, USAAI companion that helps you learn languages
PlaygentSan Francisco, CA, USASandboxes for AI agents
PleomNew York City, NY, USAAgentic Business Intelligence
PreseenSan Francisco, CA, USAThe AI forecasting company for global macro events.
ProcIndexSan Francisco, CA, USAAI-powered accounting automation for construction and manufacturing
ProliferateSan Francisco, CA, USAManage a team of agents from your desktop
QuotainNew York City, NY, USAAI sales simulations using your real deals
ReacherSan Francisco, CA, USA; RemoteWe automate creator marketing for the world's largest brands
RealRootsSan Francisco, CA, USAIRL friendship app for women
RebulkOlathe, KS, USAAccurately measure and monitor bulk inventory
RellingSan Francisco, CA, USAdeploying the first billion robots for manufacturing
Risely AISan Francisco, CA, USAAI agents that automate administrative work across college campuses.
RiverbankBoston, MA, USAAI-native Red Teaming and Offensive Security
RowFlowNew York City, NY, USAReplacing forms with AI conversations
RuvoSão Paulo, SP, BrazilThe Global Dollar App for Brazil
SapienSan Francisco, CA, USASynthetic populations for decisions
SerafisSan Francisco, CA, USANarrative intelligence for investors
ShorSan Francisco, CA, USAInternational payroll, built for founders
SigmanticAISan Francisco, CA, USAThe Cursor for Chip Design - Delivering Silicon-Ready Chip Designs…
SiraSan Francisco, CA, USAAI Native Rippling for Deskless Workers
SlashySan Francisco, CA, USACursor for Email
Socratix AISan Francisco, CA, USAAI coworkers for fraud and compliance teams.
SolvaNew York City, NY, USAAutomates insurance claims and stops incorrect payouts
Spotlight RealtySan Francisco, CA, USAAI powered brokerage reducing residential rental commissions in NYC…

The Open Source Agentic IDE
Stellon LabsSan Francisco, CA, USABuilding tiny frontier AI models that run on edge devices
StocklineParis, Île-de-France, FranceAI-native ERP for food wholesalers
StormySan Francisco, CA, USAAl platform that makes social marketing as easy as running a Google…
Synthetic SocietyNew York City, NY, USASynthetic Users to Simulate Real Users
TectoAISan Francisco, CA, USAA Platform for AI Governance
TesoraSan Francisco, CA, USAFrontier AI for Actuaries
The Prompting CompanySan Francisco, CA, USAWe help products get discovered & used by AI agents.
TheoraSan Francisco, CA, USAThe AI verification layer for trusted clinical trials in India.
TopologicalSan Francisco, CA, USAPhysics-based foundation models for CAD optimization.
TraceLondon, England, United KingdomContext-aware orchestration between humans and AI.
TraceRoot.AISan Francisco, CA, USAOpen source self-healing layer for AI agents
truthsystemsSan Francisco, CA, USAAutomatically blocking risky behavior with real-time governance agents
TwentyTwoNew York City, NY, USAAI infrastructure for biosecurity
Uplift AISan Francisco, CA, USAFoundational Voice Models for regional languages
VeritusSan Francisco, CA, USAAI agents for the consumer lending industry
Verne RoboticsSan Francisco, CA, USAAI models that teach robots new skills in hours
VibeFlowSan Francisco, CA, USAAI content manager that grows your company's online presence
Vulcan TechnologiesAustin, TX, USASecure frontier AI for government & adjacent knowledge work
WaferSan Francisco, CA, USAAI that makes AI fast
WaylineSan Francisco, CA, USAAI voice for property managers
WedgeSan Francisco, CA, USAPalantir for Healthcare AI Agents