What they do:
a phone where AI is the interface
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HQ: San Francisco, CA, United States
Y Combinator Fall 2026 Startups
This list has 139 startups and was last updated on Oct 15, 2026. 13 of them are hiring right now. Biggest hubs: San Francisco (96), New York (7), and Los Angeles (4). Largest teams: Perit.AI, Ignition Benefits, and Invertix.
139 startupsPage 4 of 4
What they do:
Like Crosby, but for real estate development
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HQ: Phoenix, AZ, United States
What they do:
Training Data For Speech Models.
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HQ: San Francisco, CA, United States
What they do:
Lark - AI agents that automate workflows for wholesale distributors
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HQ: San Francisco, CA, United States
What they do:
Autonomous accounting platform for global companies
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What they do:
Cloud development environments for AI coding
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HQ: San Francisco, CA, United States
What they do:
The pit crew for machines and robots.
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HQ: San Francisco, CA, United States
What they do:
AI Data Analyst for fast-growing teams
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HQ: San Francisco, CA, United States
What they do:
The operating system for tech startups.
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HQ: San Francisco, CA, United States
What they do:
building the open agent runtime
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HQ: Ankara, Turkey
What they do:
Open-model inference provider for Europe, private by default.
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What they do:
An agentic phone that does your busywork
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HQ: Germany
What they do:
Helping bond investors find what's rich or cheap, and why
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HQ: San Francisco, CA, United States
What they do:
Force-sensing wristband for training robotic AI
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HQ: San Francisco, CA, United States
What they do:
Actuators for Physical AI
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HQ: San Francisco, CA, United States
What they do:
Catch wrong LLM answers before your customers do
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HQ: San Francisco, CA, United States
What they do:
Android for drones
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HQ: San Francisco, CA, United States
What they do:
Helps build social skills through daily practice
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HQ: San Francisco, CA, United States
What they do:
Caveman cuts what AI agents cost without making them dumber.
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HQ: Amsterdam, Netherlands
What they do:
Physical intelligence for every decision with Geospatial AI.
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HQ: San Francisco, CA, United States
What they do:
Always-on AI security engineer
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HQ: San Francisco, CA, United States
What they do:
The full-stack AI CRO for drug discovery.
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HQ: San Francisco, CA, United States
YC F26Early stage
What they do:
Persistent sandboxes for agents like hermes, openclaw, claude code
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HQ: New York, NY, United States
YC F26Early stage
What they do:
Next generation gas turbines for data centers & aviation
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YC F26Early stage
What they do:
Hyperscaling space manufacturing
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HQ: Los Angeles, CA, United States
YC F26Early stage
What they do:
Autonomous CNC factories for faster hardware
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HQ: San Francisco, CA, United States
YC F26Early stage
What they do:
Resin helps engineers design electronics faster and more reliably
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HQ: San Francisco, CA, United States
YC F26Early stage
What they do:
AI-guided ballistic missiles, cheap enough to field in numbers that…
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HQ: San Francisco, CA, United States
YC F26Early stage
What they do:
A graph based IDE for when agents program faster than you can read
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HQ: San Francisco, CA, United States
YC F26Early stage
What they do:
Mashup any game
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HQ: San Francisco, CA, United States
YC F26Early stage
What they do:
Commercial insurance for small businesses
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HQ: Salt Lake City, UT, United States
YC F26Early stage