What they do:
We assemble PCBs in under 48 hours for quantities under 10
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HQ: San Francisco, CA, United States
Y Combinator Winter 2025 Startups
This list has 166 startups and was last updated on Oct 15, 2026. 68 of them are hiring right now. Biggest hubs: San Francisco (103), New York (19), and London (6). Largest teams: Spott, AfterQuery, and Mundo AI. Latest round: Exin Therapeutics raised $2.16M (Feb 10, 2026).
166 startupsPage 4 of 5
What they do:
Open Source React.js Library for AI Chat
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HQ: San Francisco, CA, United States
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A Disease Focused Biotech, Building Multiple Billion Dollar Drugs
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HQ: San Francisco, CA, United States
What they do:
AI documentation engineer – test & autoimprove stale product docs
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HQ: San Francisco, CA, United States
What they do:
We help companies win government funding with AI
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HQ: San Francisco, CA, United States
What they do:
Lovable for Chrome Plugins
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HQ: San Francisco, CA, United States
What they do:
The agentic AI Word editor
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HQ: San Francisco, CA, United States
What they do:
Continuous inference for streaming AI models
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What they do:
AI-native remote operations center for hardware fleets
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HQ: San Francisco, CA, United States
What they do:
Voice AI for medical language translation
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HQ: San Francisco, CA, United States
What they do:
Zero code network tracer
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HQ: San Francisco, CA, United States
What they do:
AWS for AI Agents
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HQ: San Francisco, CA, United States
What they do:
Founder led hiring for London startups
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What they do:
The AI Maximalist Software Holding Company
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HQ: San Francisco, CA, United States
What they do:
Outbound Sequencing Infrastructure for Startups
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HQ: San Francisco, CA, United States
What they do:
The social network layer for AI apps
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HQ: San Francisco, CA, United States
What they do:
How elite law firms do intake
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HQ: Miami, FL, United States
What they do:
AI personal assistant for in-home sales
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HQ: San Francisco, CA, United States
What they do:
The health coach that texts you first
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HQ: San Francisco, CA, United States
What they do:
AI Chat & Stories
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HQ: San Francisco, CA, United States
What they do:
Real-time AI translator for global sales and marketing
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HQ: Seoul, South Korea
What they do:
Build internal tools with AI
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HQ: San Francisco, CA, United States
What they do:
AI Healthcare Provider Credentialing Software
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HQ: New York, NY, United States
What they do:
AI agents for conversational commerce
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HQ: San Francisco, CA, United States
What they do:
Headless Data Team
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HQ: San Francisco, CA, United States
What they do:
Simplifying Collaboration for Healthcare Organizations & Professionals
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HQ: New York, NY, United States
What they do:
We turn complex API integrations into drop‑in full‑stack libraries
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HQ: Amsterdam, Netherlands
What they do:
Foundational model research
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HQ: San Francisco, CA, United States
What they do:
We automate urban planning so cities can build cheaper and faster.
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What they do:
AI Employees for Hotels
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HQ: San Francisco, CA, United States
What they do:
Building agents that reads logs and fixes issues on your behalf.
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HQ: San Francisco, CA, United States
What they do:
Stablecoin neobank for emerging markets
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HQ: New York, NY, United States
What they do:
We turn traditional companies into AI companies
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HQ: San Francisco, CA, United States
What they do:
The AI Front Door For Law Firms
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HQ: New York, NY, United States
What they do:
AI tutors for exam prep
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HQ: New York, NY, United States
What they do:
A vintage marketplace curated by AI
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HQ: New York, NY, United States