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OpenEvidence

AI assistant for doctors that provides answers based on peer-reviewed research, the 'ChatGPT for doctors'.

Founders

Daniel Nadler (Canada · ♂) — A Harvard PhD economist who built and sold financial-AI company Kensho to S&P Global, then founded OpenEvidence to do for medical literature what Kensho did for finance.
Zachary Ziegler (United States · ♂) — A Harvard machine-learning researcher who co-founded OpenEvidence to build AI clinical decision support for physicians.

Shares the most investors with (number = shared investors):

Date	Round	Amount
Jan 2026	Series D Plus OpenEvidence closed a $250 million Series D co-led by Thrive Capital and DST Global at a $12 billion valuation, after 18 million medical consultations.	$250M
Oct 2025	Funding round OpenEvidence raised $200 million led by Google Ventures at a $6 billion valuation.	$200M

Tap an investor to see what else they have backed.

Data is community-curated and may be incomplete.