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YC F26 · Active

Archangel Health

Infra to make AI safe enough to practice medicine

Class
Fall 2026
Status
Active
Industry
Healthcare
Location
San Francisco, CA, USA
Team size
2

Website

https://www.archangelhealth.ai/

About

Archangel Health builds the infrastructure to post-train and evaluate medical AI: RL environments inside real de-identified EHRs, physician-verified training data, and benchmarks that test clinical reasoning on hard cases. Frontier labs and medical AI companies use it today, and we're now moving toward post-training open-source models for health systems on their own data and their own physicians' judgment