Y Combinator Spring 2025 companies

Organizational Superintelligence

Gigascale Nanomanufacturing

The voice interface replacing your keyboard

Environments for Long Horizon Tool Use

Design a chip in minutes

Discover & Build AI Chatbots

Outbound voice and text AI without a prompt

The perpetual sandbox platform

24/7 Global Stock Exchange

The first AI mortgage lender

RWE Generation in minutes

Open-source agents to build predictive ML models from a prompt

Simulation Engine for Benchmarking AI Products

Software to monitor, control, and optimize data centers.

Secure internal apps. Built by AI in seconds. Powered by your data.

Open Source Analytics Agent

Let your agent build dashboards and reporting.

Agentic AI Security and Governance

AI-powered code review platform

Build and share mobile apps in seconds

AI agents for insurance claims operations

Vertical AI for highly-regulated manufacturing

Your First AI Sales Hire for Wholesale Distributors

AI native accounting firm

Give every agent a cloud desktop

Agentic AI platform for Pharma GTM teams

Personal AI healthcare agent, powered by clinical and wearable data.

🪸 AI consumer social

The agentic operating system for modern system integrators.

AI-Native Mortgage Broker

AI Native Commercial Insurance Broker

The data gateway for agents.

AI Revenue Platform for Post-Acute Care

A dual-arm robot built for physical AI.

Custom models trained on your data

The fastest & most scalable graph-vector database on the market

Tools for the next era of physical automation.

AI-powered robotics for scientific lab automation.

Open source, agentic knowledge bases for all of humanity's knowledge.

The open-source context layer for data agents

Creator marketing that scales like paid ads

Build governed AI agents on your own data, without code

Open source platform to build AI agent workflows

AI agents that help you understand your customers' needs

Turn your hardest documents into reliable data

Units builds full-stack AI education infrastructure.

Accelerating data analysis for research

Industrial Robots that Learn and Operate Like Humans

AI manager for physical stores

AI CRM for Government

Scaling engine for PostgreSQL

Faster builds, zero effort.

We automate your entire product development lifecycle.

Test, monitor, and improve your voice and chat AI agents

The authentication framework for TypeScript

Multi-document processing for your risk teams, AI agents, pipelines

Training gyms for computer use and software engineering work

Open-source frontier models for knowledge work

Encrypted AI with verifiable privacy

AI-native Zocdoc

AI Driven EPC - Weld Fabrication Contractor

Grammarly for Math ✏️

Say it and it's done. Voice is the new OS

AI coworker for Accountants

Product Native Models

Your new AI-powered math tutor.

Intelligence Infrastructure on People and Entities

AI-Powered Optical Consulting & Software

The data layer for scientific research

AI for Field Inspection Reports

Turn scattered data into one platform for decision-making

Conversational robots for physical businesses.

Automate anything on the web.

AI-optimized ticket resale

Reinforcement learning as a service

AI workers for Skilled Nursing and Senior Living Operations

Realtime Sales Copilot

Autonomous security testing for web apps, APIs, cloud, and AI systems

The AI Associate for Litigation Lawyers

AI-native operating system for vehicle fleet management

Function Health for Europe

Vertical AI agents running B2B outbound on autopilot, with human SDRs

The agentic system of action for hotel groups and management companies

AI-native financial institution for global businesses + agents.

Specialized AI for Every Job

AI employees that automate medical operations for clinics.

Deploy AI Agents with a Single API Call

AI Mobile App Quality Assurance Tester

Understand your users beyond the numbers

The smarter way to estimate steel.

Voice data for AI

Building reinforcement learning environments

Efficient and compact power supply for AI hardware

Cursor for Lawyers. Agentic AI in MS Office.

AI-Native IP Enforcement Agent

High Quality Coding & Agentic Data for AI labs

Managed GPU-accelerated Spark + SQL at 2x speed and half the cost

quantum-accelerated AI servers

Robots for the inspection and maintenance of data centers

Open-source semi-humanoid dev kit → home data → autonomy → 20h/wk

Software tool for designing robots and machines

The AI Operator for Financial Services

Your Agentic Trading Desk — Building the next era of agentic…

Turn website workflows into reliable APIs

Life sciences reagents and software

Valuemate automates real estate appraisals with AI

A personal EA in your iMessage

AI-powered operating system for trucking companies.

Specialized AI for Critical Industries

Unified Agent Infrastructure

The operating system for the 100x Engineering Team

chrt is a logistics platform for time-critical shipping

Autonomous Security Agents

We help you get compliant while you focus on your business.

Real-time AI Compliance for Medical Documentation

Streamlining Data Capture to Report Creation for Heavy Industries

AI financial auditors

Automatically write and update internal docs with every code commit.

Transforming healthcare operations with AI agents

AI Agents for Security Operations Teams

Hands off QA via intelligent browser agents.

Make real life a video game

Experiment tracking for training ML models

AI Digital Workers for Supply Chain

Modernizing the police workflow.

Industrial data layer for robotics training

All-In-One AI Growth Partner. Built for Trades.

Play the latest games in your browser with no downloads

Self-Driving CI

Alfi - your group chat with social skills to bring friends closer

Program verification so even your systems engineers can vibecode

The open-source context retrieval layer for agents

AI + human review to solve data cleaning - accessible via API or Excel

The AI-Native Consumer + Plaintiff Law Firm

Your AI Chief of Staff

Commercial alternative to the Deep Space Network

AI Agents to win denied health insurance claims.

AI-powered code security

AI Physics Engine to replace simulations and prototypes

We supply hard tech companies with critical components.

Real-world data for multimodal and embodied AI

AI agents for web testing

The agentic CRM for blue-collar services