What they do:
The world's frontier hacker of AI agents.
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HQ: San Francisco, CA, United States
Top Reinforcement Learning Startups
This list has 48 startups and was last updated on Oct 15, 2026. 7 of them are hiring right now. Largest teams: rct AI, HUD, and Sepal AI.
48 startupsPage 2 of 2
What they do:
Expert computer-use data for frontier AI labs
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What they do:
The biggest crowdsourced benchmark for Computer-Use
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HQ: San Francisco, CA, United States
What they do:
Open source AI gateway that turns your traffic into better models
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HQ: San Francisco, CA, United States
What they do:
Research lab solving non-verifiable work
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HQ: San Francisco, CA, United States
What they do:
Evals for frontier research agents
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HQ: San Francisco, CA, United States
What they do:
Monetize your agent's traces.
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HQ: San Francisco, CA, United States
Sepal AI
Acquired
What they do:
Data Development for Advanced AI
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HQ: San Francisco, CA, United States
Resonance
Acquired
What they do:
Self-improving content bank for marketing
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HQ: San Francisco, CA, United States
Pathmind
Shut down
What they do:
Pathmind helps industrial engineers and simulation modelers achieve…
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HQ: San Francisco, CA, United States
Nuntius
Shut down
What they do:
Making Models Follow Rules.
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HQ: San Francisco, CA, United States
Sylvian
Shut down
What they do:
Specialized AI Agents.
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HQ: San Francisco, CA, United States