ThirdBrain Labs
ThirdBrain Labs is an a16z speedrun SR006 company. Based in San Francisco, California, United States of America. Team of 2, founded in 2025.
About ThirdBrain Labs
Summary
ThirdBrain Labs builds post-training infrastructure that lets domain teams convert their own expert knowledge into fine-tuned, proprietary AI models they own outright. It captures training signals directly from expert decisions in production, then continuously updates models without requiring large labeled datasets or manual data-preparation work. The product targets teams that currently depend on general-purpose, closed-model APIs and want task-specific models they control.
Go-to-market
Domain experts and research teams engage through a demo request, pointing to a sales-assisted onboarding process rather than self-serve sign-up.
Facts
- AI Infra
- San Francisco, California, United States of America
- 2
- 2025
Founders (2)
- David Huang
- Margaret Zhang
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