YC Spring 2025 (X25)
144 companies Y Combinator lists for Spring 2025, with what each one builds. 80.5% of the tagged companies are AI, up from 78.5% in W25.
- Companies
- 144
- AI share
- 80.5%
- Top sector
- Engineering, Product and Design
- 24 companies
- Second
- Manufacturing and Robotics
- 9 companies
What’s in Spring 2025
Spring 2025 lists 144 companies so far (W25 had 165). The biggest themes by YC's tags are Developer Tools (20), Infrastructure (9), Manufacturing (9), Robotics (8) and Hard Tech (6). The largest sectors are Engineering, Product and Design, Manufacturing and Robotics, Infrastructure and Security. 15.2% are based outside the US.
- Developer Tools · 20
- Infrastructure · 9
- Manufacturing · 9
- Robotics · 8
- Hard Tech · 6
See what YC asked founders to build · Breakout themes across batches
All Spring 2025 companies
144 companies
- AcoliteAI
AI Native Commercial Insurance Broker
Insurance3Philadelphia, PA, USA - AdentrisAI
Real-time AI Compliance & Revenue Integrity for Medical Providers
Healthcare IT5San Francisco, CA, USA - Aegis
AI Agents to win denied health insurance claims.
Healthcare IT3San Francisco, CA, USA - Airweave
The open-source context retrieval layer for agents
Infrastructure7San Francisco, CA, USA - AlkaliAI
The smarter way to estimate steel.
Engineering, Product and Design2Houston, TX, USA - AlmondAI
A dual-arm robot built for physical AI.
Manufacturing and Robotics6San Francisco, CA, USA - AnanaAI
AI Workspace for Hospitality Commercial Teams
B2B2New York City, NY, USA - Aravolta
Software to monitor, control, and optimize data centers.
Infrastructure4San Francisco, CA, USA - Atlog
Outbound voice and text AI without a prompt
Operations2New York City, NY, USA - Attune
Faster builds, zero effort.
Engineering, Product and Design3San Francisco, CA, USA - Atum Works
Gigascale Nanomanufacturing
Manufacturing and Robotics3San Francisco, CA, USA - AuctorAI
The agentic operating system for modern system integrators.
B2B30New York City, NY, USA - Avallon AI
AI agents for insurance claims operations
Insurance7New York City, NY, USA - Aviro
Environments for Long Horizon Work
B2B2San Francisco, CA, USA - BelugaAI
Creator marketing that scales like paid ads
Marketing3San Francisco, CA, USA - Besimple AIAI
Voice data for AI
B2B8San Francisco, CA, USA - Better Auth
The authentication framework for TypeScript
Security4San Francisco, CA, USA - BitBoardAI
Let your agent build dashboards and reporting.
Analytics2San Francisco, CA, USA - BitPatrolAI
AI-powered code security
Security1New York City, NY, USAAcquired - BlaxelAI
The infrastructure for autonomous agents
B2B12San Francisco, CA, USAAcquired - Bloom
Build and share mobile apps in seconds
Engineering, Product and Design2 - BluejayAI
Test, monitor, and improve your voice and chat AI agents
B2B10San Francisco, CA, USA - BlueshoeAI
The AI-Native Consumer + Plaintiff Law Firm
Legal2San Francisco, CA, USA - BondAI
Your AI Chief of Staff
Productivity3San Francisco, CA, USA
Source: Y Combinator’s public company directory. Each company links to its YC profile. See how we count and what YC asked founders to build.