Companies145
Active94%
Acquired or public3%
Inactive2%
Y Combinator's directory lists 145 companies in the Spring 2025 batch: 137 Active, 5 Acquired, 0 Public and 3 Inactive. Spring 2025 is less than two years out, so its Inactive share (2%) is not yet comparable with older batches (23% across batches at least two years old).
ActiveAcquiredPublicInactive
Statuses are Y Combinator's own listing in its public company directory, read on the date shown. YC's directory can drop companies altogether, so the Inactive counts here are a floor, not a full count of companies that stopped. Acquired and Public are as YC lists them; neither says anything about the price or the outcome for founders.
What the directory lists about Spring 2025
- By the industry YC files each company under: B2B 98, Industrials 16, Healthcare 10, Consumer 7, Fintech 7, Education 4, Government 2, Real Estate and Construction 1.
- Where 139 of the 145 companies say they are based, by the first location each lists: San Francisco, CA, USA (84), New York City, NY, USA (20), London, England, United Kingdom (13), Paris, Île-de-France, France (4), San Francisco (3), Boston, MA, USA (2), Los Angeles, CA, USA (2), Ann Arbor, MI, USA (1), and 10 other places.
- Earlier names on the entries: Acolite (earlier Blueplan and Anvil); Adentris (earlier Wrkdn, Work Done (WRKDN), WorkDone and WorkDone Health); Alkali (earlier Alkali Engineering); Anana (earlier DMV-EZ and cleon); Aravolta (earlier CentralAxis); Atum Works (earlier phorg); Auctor (earlier Auctor AI); Aviro (earlier Tropir); Beluga (earlier Beluga Labs); Besimple AI (earlier Simple Annotation); BitBoard (earlier Realm); Blaxel (earlier Beamlit); Bramante (earlier LabKick Corporation, LabKick and Bramante Biologics); Cactus (earlier Cravd and Cactus AI); Cartpole (earlier Prophet and Jazzberry); and 66 more.
Every company in Spring 2025
| Company | What they do | Status | Team |
|---|---|---|---|
| Acolite | AI Native Commercial Insurance Broker | Active | 3 |
| Adentris | Real-time AI Compliance & Revenue Integrity for Medical Providers | Active | 5 |
| Aegis | AI Agents to win denied health insurance claims. | Active | 3 |
| Airweave | The open-source context retrieval layer for agents | Active | 7 |
| Alkali | The smarter way to estimate steel. | Active | 2 |
| Almond | America's robot factory | Active | 6 |
| Anana | AI Workspace for Hospitality Commercial Teams | Active | 2 |
| Aravolta | Software to monitor, control, and optimize data centers. | Active | 4 |
| Atlog | Outbound voice and text AI without a prompt | Active | 2 |
| Attune | Faster builds, zero effort. | Active | 3 |
| Atum Works | Gigascale Nanomanufacturing | Active | 3 |
| Auctor | The agentic operating system for modern system integrators. | Active | 30 |
| Avallon AI | AI agents for insurance claims operations | Active | 7 |
| Aviro | Environments for Long Horizon Work | Active | 2 |
| Beluga | Creator marketing that scales like paid ads | Active | 3 |
| Besimple AI | Voice data for AI | Active | 8 |
| Better Auth | The authentication framework for TypeScript | Active | 4 |
| BitBoard | Let your agent build dashboards and reporting. | Active | 2 |
| Bloom | Build and share mobile apps in seconds | Active | 2 |
| Bluejay | Test, monitor, and improve your voice and chat AI agents | Active | 10 |
| Blueshoe | The AI-Native Consumer + Plaintiff Law Firm | Active | 2 |
| Bond | Your AI Chief of Staff | Active | 3 |
| Boost Robotics | Robots for the inspection and maintenance of data centers | Active | 2 |
| Bramante | Life sciences reagents and software | Active | 2 |
| Cactus | All-In-One AI Growth Partner. Built for Trades. | Active | 2 |
| Capacitive | The data gateway for agents. | Active | 2 |
| Cartpole | Building reinforcement learning environments | Active | 2 |
| Cascade Space | Commercial alternative to the Deep Space Network | Active | 7 |
| Casco | Autonomous security testing for web apps, APIs, cloud, and AI systems | Active | 10 |
| Cashew Labs | Recursive self improving harnesses and models | Active | 2 |
| Chestnut | The first AI mortgage lender | Active | 2 |
| Chiron | Grammarly for Math ✏️ | Active | 2 |
| chrt | chrt is a logistics platform for time-critical shipping | Active | 5 |
| Claim Health | AI Revenue Platform for Post-Acute Care | Active | 6 |
| Clarm | Build governed AI agents on your own data, without code | Active | 2 |
| Clidey | Turn scattered data into one platform for decision-making | Active | 5 |
| Code Four | Modernizing the police workflow. | Active | 3 |
| Cohesive | The agentic CRM for blue-collar services | Active | 2 |
| Combinely | AI coworker for Accountants | Active | 8 |
| Cotool | Security operations optimized for agents. | Active | 8 |
| Crimson | The AI Associate for Litigation Lawyers | Active | 7 |
| Cua | Give every agent a cloud desktop | Active | 3 |
| cubic | AI-powered code review platform | Active | 6 |
| Den | Make real life a video game | Active | 2 |
| Docket | AI agents for web testing | Active | 2 |
| Eloquent AI | The AI Operator for Financial Services | Active | 5 |
| Feyn | Custom models trained on your data | Active | 3 |
| Flott HQ | AI-native operating system for vehicle fleet management | Active | 2 |
| Foundation Industries | We supply hard tech companies with critical components. | Active | 5 |
| Freesolo | Product Native Models | Active | 4 |
| Frekil | RWE Generation in minutes | Active | 2 |
| Godela | AI Physics Engine to replace simulations and prototypes | Active | 10 |
| Golf | Agentic AI Security and Governance | Active | 1 |
| GroundControl | Vertical AI for highly-regulated manufacturing | Active | 8 |
| HABIT | Accelerating world models. | Active | — |
| HelixDB | The fastest & most scalable graph-vector database on the market | Active | 6 |
| Hemut | AI-powered operating system for trucking companies. | Active | 3 |
| Human Behavior | Understand your users beyond the numbers | Active | 3 |
| IRBC | AI-native financial institution for global businesses + agents. | Active | 3 |
| Jeevy Fabrication | AI Driven EPC - Weld Fabrication Contractor | Active | 3 |
| Kaelio | The open-source context layer for data agents | Active | 8 |
| Kairos | Specialized AI for Critical Industries | Active | 3 |
| Kaizen | Automate anything on the web. | Active | 6 |
| Kashikoi | Simulation Engine for Benchmarking AI Products | Active | 2 |
| Kestral | We automate your entire product development lifecycle. | Active | 3 |
| Klavis AI | RL environments and training data for frontier AI labs | Active | 5 |
| Labric | The data layer for scientific research | Active | 6 |
| Lapel | Infrastructure to power every customer interaction. | Active | 14 |
| Leeroo | Organizational Superintelligence | Active | 3 |
| Linewise | Industrial data layer for physical RSI | Active | 25 |
| Lucis | Function Health for Europe | Active | 17 |
| Lumari | AI Digital Workers for Supply Chain | Active | 5 |
| Mbodi AI | Industrial Robots that Learn and Operate Like Humans | Active | 6 |
| Mesmer | We build software factories for engineering teams | Active | 7 |
| Method | Agents that improve | Active | 1 |
| MindFort | Autonomous Security Swarms | Active | 6 |
| Minerva | AI native financial institution | Active | 5 |
| mlop | Experiment tracking for training ML models | Active | 2 |
| Moby Analytics | AI financial auditors | Active | 4 |
| Morphik | AI workers for Skilled Nursing and Senior Living Operations | Active | 2 |
| MorphoAI | Software tool for designing robots and machines | Active | 12 |
| Naïve | Autonomous Company Infrastructure | Active | 12 |
| nao Labs | Open Source Analytics Agent | Active | 2 |
| neoncoral | Active | 1 | |
| Nimbic AI | Automatically write and update internal docs with every code commit. | Active | 3 |
| NODI Energy | Distributed energy infrastructure unlocking grid power to data centers | Active | 2 |
| Nomi | Realtime Sales Copilot | Active | 5 |
| Novoflow | Computer-using agents for healthcare operations | Active | 6 |
| Opusense AI | AI for Field Inspection Reports | Active | 2 |
| Orchid | A personal EA in your iMessage | Active | 3 |
| Paper Instruments | Open-source frontier models for knowledge work | Active | 3 |
| ParaQuery | Managed GPU-accelerated Spark + SQL at 2x speed and half the cost | Active | 1 |
| Parsewise | Multi-document processing for your risk teams, AI agents, pipelines | Active | 6 |
| Partcl | Design a chip in minutes | Active | — |
| Pelica | AI agents for risk-bearing healthcare organizations | Active | 5 |
| PgDog | Scaling engine for PostgreSQL | Active | 3 |
| Photonium | AI-Powered Optical Consulting & Software | Active | 5 |
| Plexe | Open-source agents to build predictive ML models from a prompt | Active | 2 |
| Prism | Abundant Intelligence for Everyone | Active | 2 |
| Probo | We help you get compliant while you focus on your business. | Active | 6 |
| QFEX | 24/7 Global Stock Exchange | Active | 14 |
| QualGent | AI Mobile App Quality Assurance Tester | Active | 10 |
| Ralo | AI-Native Mortgage Broker | Active | 2 |
| Refresh | Training gyms for computer use and software engineering work | Active | 8 |
| Rimba | Streamlining Data Capture to Report Creation for Heavy Industries | Active | 4 |
| RunRL | Reinforcement learning as a service | Active | 2 |
| Scalar Field | Your Agentic Trading Desk — Building the next era of agentic… | Active | 3 |
| sieve | AI + human review to solve data cleaning - accessible via API or Excel | Active | 2 |
| Sim | Build autonomous AI agents for enterprise systems | Active | 10 |
| Sixtyfour | Intelligence Infrastructure on People and Entities | Active | 12 |
| StarSling | Self-Driving CI: fast AI-native GitHub Actions runners | Active | 3 |
| stratify | AI agents that help you understand your customers' needs | Active | 2 |
| Sureform | Real-world company data for frontier AI | Active | 4 |
| Sygaldry Technologies | quantum-accelerated AI servers | Active | — |
| Synthio Labs | Agentic AI platform for Pharma GTM teams | Active | 29 |
| Tegore | Your new AI-powered math tutor. | Active | 1 |
| Text.ai | Alfi - your group chat with social skills to bring friends closer | Active | 4 |
| The Robot Learning Company | Tools for the next era of physical automation. | Active | 1 |
| Theorem | Program verification so even your systems engineers can vibecode | Active | 4 |
| Theta | Specialized AI for Every Job | Active | 7 |
| Third Chair | AI-Native IP Enforcement | Active | 19 |
| throxy | Vertical AI agents running B2B outbound on autopilot, with human SDRs | Active | 55 |
| Ticket Wallet | AI-optimized ticket resale | Active | 20 |
| Tinfoil | Encrypted AI with verifiable privacy | Active | 5 |
| Trapeze | AI-native Zocdoc | Active | 2 |
| Units | Units builds full-stack AI education infrastructure. | Active | 1 |
| ValueMate | Valuemate automates real estate appraisals with AI | Active | 2 |
| Vassar Robotics | Gearless robot joints for better embodied AI. | Active | 2 |
| Vesence | The Agent-Native Computer | Active | 10 |
| Vision Lab | Industrial data layer for physical RSI | Active | 11 |
| VoiceOS | Say it and it's done. Voice is the new OS | Active | 2 |
| Vybe | Secure internal apps. Built by AI in seconds. Powered by your data. | Active | 8 |
| Waffle | AI Video Editor | Active | 2 |
| Wavedash | Play the latest games in your browser with no downloads | Active | 3 |
| Willow | The voice interface replacing your keyboard | Active | 7 |
| YouLearn | AI tutor for each student. | Active | 3 |
| Zeon Systems | AI-powered robotics for scientific lab automation. | Active | 5 |
| BitPatrol | AI-powered code security | Acquired | 1 |
| Blaxel | The infrastructure for autonomous agents | Acquired | 12 |
| Galen AI | Personal AI healthcare agent, powered by clinical and wearable data. | Acquired | 2 |
| Kirana AI | AI manager for physical stores | Acquired | 2 |
| Propolis | Hands off QA via intelligent browser agents. | Acquired | 2 |
| Caucus | AI CRM for Government | Inactive | 3 |
| Kanava AI | Your First AI Sales Hire for Wholesale Distributors | Inactive | 2 |
| Percival | Accelerating data analysis for research | Inactive | 3 |
How this is measured
Measured 2026-11-10 from Y Combinator's company directory. Team size is the number YC lists for the company, where it lists one. Survival here means listed Active; Acquired and Public are shown separately because YC's listing does not say whether an acquisition was a good outcome.
All batchesShut-down companies
Tools for this story
Each opens in a new tab. With no account yet, you sign up free and land on the result.