YC Winter 2025 (W25)
165 companies Y Combinator lists for Winter 2025, with what each one builds. 78.5% of the tagged companies are AI, up from 75.7% in F24.
- Companies
- 165
- AI share
- 78.5%
- Top sector
- Engineering, Product and Design
- 25 companies
- Second
- Infrastructure
- 9 companies
What’s in Winter 2025
Winter 2025 lists 165 companies so far (F24 had 94). The biggest themes by YC's tags are Developer Tools (18), Fintech (11), Sales (10), Hardware (8) and Infrastructure (8). The largest sectors are Engineering, Product and Design, Infrastructure, Manufacturing and Robotics and Productivity. 18.4% are based outside the US.
- Developer Tools · 18
- Fintech · 11
- Sales · 10
- Hardware · 8
- Infrastructure · 8
See what YC asked founders to build · Breakout themes across batches
All Winter 2025 companies
165 companies
- .WaveAI
Continuous inference for streaming AI models
Engineering, Product and Design2Paris, Île-de-France, France - 10x
AI Sales Teams for Dental Practices
Healthcare3San Francisco, CA, USA - a0.devAI
We make mobile apps using AI.
Engineering, Product and Design3San Francisco, CA, USA - A1Zap by A1Base
The social network layer for AI apps
Engineering, Product and Design2San Francisco, CA, USA - AdamAI
AI Powered CAD
Engineering, Product and Design4San Francisco, CA, USA - AfterQueryAI
Applied research lab curating data solutions for foundation model…
Infrastructure30San Francisco, CA, USA - Agentin AIAI
Foundational model research
B2B2San Francisco, CA, USA - Alice.techAI
AI-driven exam prep
Education5Copenhagen, Denmark - Altrina
The SOP Automation Platform
Productivity4San Francisco, CA, USAInactive - Amby Health
The health coach that texts you first
Consumer Health and Wellness2San Francisco, CA, USA - Archon
We help software companies sell to government.
Government3San Francisco, CA, USA - Artifact
An Collaborative, AI-native IDE for Hardware Engineers
Engineering, Product and Design4Los Angeles, CA, USA - Artificial SocietiesAI
Foundational model of human societies for consequential decisions
B2B18London, England, United Kingdom - ArtilAI
Agent identity and communication infrastructure
Infrastructure2London, England, United Kingdom - assistant-uiAI
Open Source React.js Library for AI Chat
Infrastructure3San Francisco, CA, USA - AsteroidAI
The integration layer for healthcare: EHRs, payer portals & more
B2B6San Francisco, CA, USA - AstroAI
Power-ready land for AI data centers
Energy1New York City, NY, USA - AthenaHQ
Be the Answer in AI Search - AI SEO across SEO, GEO & AEO
Marketing12San Francisco, CA, USA - awenAI
awen translates intent into exceptional visuals through conversation
B2B6Paris, Île-de-France, France - Axal
We assemble PCBs in under 48 hours for quantities under 10
Manufacturing and Robotics3San Francisco, CA, USA - Axiom
Trade memecoins, perpetuals, and earn yield.
Consumer Finance2Austin, TX, USA - BezelAI
Digital AI humans that model clothes for e-commerce brands.
B2B1New York City, NY, USA - Bild AI
AI estimating & detailing for Division 8 doors, frames & hardware
Construction9San Francisco, CA, USA - Bindwell
Discovering new pesticides with AI
Agriculture24San 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.