
TrainLoop
What they do:
Reasoning Fine-Tuning
Quick facts:
HQ: San Francisco, CA, United States
This list has 1,355 startups and was last updated on Oct 15, 2026. 443 of them are hiring right now. Largest teams: Cruise, Athelas, and Checkr. Latest round: Litewave.AI raised $200K (Oct 7, 2026).

What they do:
Reasoning Fine-Tuning
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HQ: San Francisco, CA, United States

What they do:
A dual-arm robot built for physical AI.
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HQ: San Francisco, CA, United States

What they do:
Industrial data layer for robotics training
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HQ: San Francisco, CA, United States

What they do:
Automatically blocking risky behavior with real-time governance agents
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HQ: San Francisco, CA, United States

What they do:
AGI for home service
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HQ: San Francisco, CA, United States

What they do:
The AI-Native CRM that works for you
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HQ: San Francisco, CA, United States

What they do:
Simulation environments to train & evaluate long-horizon AI agents
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HQ: San Francisco, CA, United States

What they do:
AI Operating System for Clinical Development
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HQ: San Francisco, CA, United States

What they do:
Legora for physical engineering firms
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HQ: San Francisco, CA, United States

What they do:
Network for Physical AI Data Business
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HQ: San Francisco, CA, United States

What they do:
Vibe code games.
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HQ: San Francisco, CA, United States

What they do:
Transform your video monitoring with AI
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HQ: San Francisco, CA, United States

What they do:
Get into the competitive deals you can't see
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HQ: San Francisco, CA, United States

What they do:
AI for R&D of consumer brands like P&G to develop better products
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HQ: San Francisco, CA, United States

What they do:
Ultra-precise AI weather forecasting.
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HQ: San Francisco, CA, United States

What they do:
Procure the right software 5x faster
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HQ: San Francisco, CA, United States

What they do:
Meet qualified leads in person by automating conference production
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HQ: San Francisco, CA, United States

What they do:
The AI workforce for freight dispatch
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HQ: San Francisco, CA, United States

What they do:
End-to-end AI agents for property claims, from loss report to estimate
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HQ: San Francisco, CA, United States

What they do:
Bring your photos to life with Vimmerse
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HQ: San Francisco, CA, United States

What they do:
Self-learning care for complex illness
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HQ: San Francisco, CA, United States

What they do:
GTM AI that books you 5-8 meetings/week
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HQ: San Francisco, CA, United States

What they do:
Open-source, AI-first and no-code business automation tool
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HQ: San Francisco, CA, United States

What they do:
AI Wealth Manager
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HQ: San Francisco, CA, United States

What they do:
AI agents for end-to-end testing
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HQ: San Francisco, CA, United States

What they do:
Self-Improving Marketing Harness
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HQ: San Francisco, CA, United States

What they do:
Pierre is a new, opinionated, git platform.
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HQ: San Francisco, CA, United States

What they do:
Helping rehab practices book more patients
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HQ: San Francisco, CA, United States

What they do:
AI that audits AI — catching hallucinations before you ship them.
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HQ: San Francisco, CA, United States

What they do:
Helping industrial manufacturers win deals fast, at the right price.
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HQ: San Francisco, CA, United States

What they do:
Constellations as a Service
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HQ: San Francisco, CA, United States

What they do:
Making it easy for B2B sales teams to send stellar outbound
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HQ: San Francisco, CA, United States

What they do:
Conversational AI purpose-built for financial services
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HQ: San Francisco, CA, United States

What they do:
The AI Operating System For Modern Fleets.
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HQ: San Francisco, CA, United States

What they do:
Faster clinical documentation for home health nurses
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HQ: San Francisco, CA, United States

What they do:
Smart grocery pricing with AI
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HQ: San Francisco, CA, United States