Y Combinator Winter 2025 companies

Automated revenue cycle management, starting with dentists

Navigate any set of data - no matter how large - in minutes.

The OS for hospital workforce management

A Disease Focused Biotech, Building Multiple Billion Dollar Drugs

AI drug discovery platform for neurotherapeutics

Agents for Accelerated Clinical Trial Design

Cursor for Designers

infra for computer use agents

AI documentation engineer – test & autoimprove stale product docs

AI Teacher Assistant for Grading Essays

AI for air traffic control

Automating refurbishment of $1T in consumer electronics

Hire amazing engineers by seeing how they use AI

AI estimating & detailing for Division 8 doors, frames & hardware

We help companies win government funding with AI

AI Copilot that automates admin work for veterinary professionals

AI voice and texting agents

The AI Voice agents for hotels

Lovable for Chrome Plugins

AI tutor starting with maths and science

The agentic AI Word editor

Voice AI for Home Services

The Open-Core Security Graph

Next-Generation Power Electronics

Trade memecoins, perpetuals, and earn yield.

Agent with a computer

Autonomous patrol-boats for National Security

The AI Secretary for Email and Calendar.

AI-driven exam prep

Character.AI with real time video avatars

awen translates intent into exceptional visuals through conversation

AI native consumer lending platform for underserved Americans

AI-native remote operations center for hardware fleets

The world’s first AI energy developer

Voice AI for medical language translation

Zero code network tracer

AI-powered student information system for K-12 schools

An AI teammate that automatically updates your customer-facing docs

We help law enforcement solve crime

AI to monitor thousands of security cameras.

connect, migrate and implement enterprise systems

AWS for AI Agents

Founder led hiring for London startups

AI hiring platform powered by expert recruiters

Daily productivity tracker

The AI Maximalist Software Holding Company

AI for insurance verification & billing at dental clinics

Outbound Sequencing Infrastructure for Startups

The social network layer for AI apps

The SOP Automation Platform

We make mobile apps using AI.

Fusion reactors for ships

AI agents for global trade compliance

Cooking something sweet and salty!

How elite law firms do intake

AI to understand and then route engineering work

AI for Home Services

AI powered operating system for distributors and OEMs

The AI Growth Engine for Industrials

Voice AI teams for medicare agencies.

Manufacturing the most powerful chips, 15x faster

AI Powered CAD

Financial OS for Modern Fleets

AI Agents for Audit

A foundation model for physics.

The health coach that texts you first

AI compliance co-pilot for regulated financial businesses

Digital AI humans that model clothes for e-commerce brands.

Artificial Specialized Intelligence

The digital home for your personal memories that grows with you

AI Accountant for Accounting Firms

Frontier Video Agents

Chat with AI Characters

Reinforcement Learning (RL) for AI Agents

AI-powered Patient Identification for Clinical Trials

AI Sales Teams for Dental Practices

Foundation models to automate x-ray analysis for radiologists

Real-time AI translator for global sales and marketing

The AI investment analyst

Platform for building RL environments and evals

Curated stories, every day

More 𝛼, less latency: exchange and HFT on one chip.

Robots that repair roads

Fast and Data-Driven Immigration Platform

The integration layer for healthcare: EHRs, payer portals & more

AI Agents for Complex Engineering Projects

interactive video models

Where your life context becomes understanding.

Discovering new pesticides with AI

Electrical Engineering Components Compaion

AI Healthcare Provider Credentialing Software

AI agents for conversational commerce

Headless Data Team

Be the Answer in AI Search - AI SEO across SEO, GEO & AEO

Regulated derivatives exchange

Simplifying Collaboration for Healthcare Organizations & Professionals

High Quality Multilingual Training Data for AI Models

Reimagining how Machines Learn

Protect your data and stop insider risk

AI-powered research desk for hedge funds

AI agents for CX teams, starting with training and QA.

AI for the physical world

We turn complex API integrations into drop‑in full‑stack libraries

AI Agents that automate enterprise software processes

Your partner for hotel ownership data.

We automate urban planning so cities can build cheaper and faster.

AI Employees for Hotels

The LLM Eval and Observability Platform for AI Quality

Building agents that reads logs and fixes issues on your behalf.

Stablecoin neobank for emerging markets

Frontier AI research to advance game development

Enterprise-grade AI support reps for call centers

AI-native commercial insurance brokerage

AI Compliance for Affordable Housing

Customer Context for Agents

Eliminating accrual spreadsheets for faster month-end

High Thrust Space Vehicles for Satellite Defense

We turn traditional companies into AI companies

Global B2B Stablecoin Processor

In-call AI teleprompter that helps reps close enterprise deals

The AI Front Door For Law Firms

We build networks of AIs to simulate high-value audiences

AI tutors for exam prep

#1 AI Platform for Outbound Sales

Misprint is building Robinhood for Pokemon cards

Applied research lab curating data solutions for foundation model…

The Javascript framework for building AI agents, from the Gatsby devs

Software Enabled CNC Parts Supplier

We help software companies sell to government.

A vintage marketplace curated by AI

Real-time AI Voice Translation for Developers

AI performance monitoring for factory workers

Reusable Satellites

AI co-pilot for building plan review and building code compliance

AEO/GEO for E-Commerce and Retail

Connect your users to their apps

Making humanoids dexterous enough to thread a needle

Claude Code plugin that reduces token consumption and cost by 50%

AI-native ATS/CRM for recruiting firms

AI-Powered Company OS

Test, monitor, and improve your voice agents

AI-Powered Hardware System Design Software

Vercel For GPUs

AI for accounting

Embedded Sandboxes for Agents

The first healthcare GTM data platform

AI agents built for insurance.

AI agents and unified data layer for revenue teams

Agent Teams for Professionals

Leading open-source web agent project with 50k stars in 3 months

Execute the best sales playbook in industry

Book and manage all of your golf tee times in one place.

AI Quote and Order Automation for Distributors & Manufacturers

Building lunar landers

Computational Law

Reasoning Fine-Tuning

The AI Coworker in Chrome

Service company that designs, sources, and quality-tests custom PCBs

An Collaborative, AI-native IDE for Hardware Engineers

Open Source React.js Library for AI Chat

Financial research platform for investment firms

AI Platform for Commercial Insurance Brokerages

Stablecoin API for global payments

Building the open source smart glasses operating system.

A Roomba for weeds on a farm.