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Founders
Daniel Nadler

Daniel Nadler

Founder, OpenEvidence ·

Largest round$250MOpenEvidence · 2026 Followers on X1.1K

About Daniel

Daniel Nadler is the founder of OpenEvidence, an AI platform designed to assist healthcare professionals by providing access to medical information. The platform helps doctors search medical literature and review cited information relevant to clinical questions. Nadler previously founded Kensho and co-founded EDO. He holds a Ph.D. from Harvard University.

PATH · 7 MILESTONES

Daniel Nadler | From Kensho to OpenEvidence, AI in Healthcare

2025 → 2026·0phases·now

Every tag links its source.

Network

Backed by 6

AAndreessen HorowitzLed OpenEvidence's Series B+, 2026 Hhospital systemsLed OpenEvidence's Series B+, 2026

DDST GlobalLed OpenEvidence's Series B+, 2026

TThrive CapitalLed OpenEvidence's Series B+, 2026

GGVLed OpenEvidence's Series B+, 2025

KKleiner PerkinsLed OpenEvidence's Series B+, 2025

DNDaniel Nadler

Built and backed 1

OOpenEvidenceFounder

Background

Role CEO of OpenEvidence
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Timeline, line by line 7

OpenEvidence raised $250M (Series B+), led by Andreessen Horowitz and hospital systems.Sep 24, 2026
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OpenEvidence expands free AI clinical tool to 100 countries in collaboration with Anthropic.Sep 23, 2026
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Discusses OpenEvidence's ad-supported model and future plans.May 13, 2026
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OpenEvidence raised $250M (Series B+), led by DST Global and Thrive Capital.Jan 21, 2026
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OpenEvidence raised $200M (Series B+), led by GV.Oct 20, 2025
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OpenEvidence raised $210M (Series B+), led by GV and Kleiner Perkins.Jul 15, 2025
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OpenEvidence raised $75M (Series A), led by Sequoia.Feb 20, 2025
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In their words

“Access to medical knowledge shouldn’t depend on geography.”Regarding the expansion of OpenEvidence to low- and middle-income countries. · Sep 23, 2026
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Interviews and coverage

Fresh NPJ Health Systems study confirms the reliability of Daniel Nadler’s OpenEvidenceDigital Journal · Oct 6, 2026
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OpenEvidence is free for now. Its CEO has a plan for who will pay.NBC News · May 13, 2026
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AI Founder Daniel Nadler Is Twice As Rich After OpenEvidence Hits $12 Billion ValuationForbes · Jan 21, 2026
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A visit to your doctor will soon look very different thanks to Daniel Nadler’s OpenEvidenceSan Francisco Examiner · Aug 19, 2026
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How OpenEvidence Is Helping DoctorsUSA Today · Aug 28, 2026
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Anthropic, OpenEvidence Expand Free AI Clinical Tool to 100 Countries: ReportTradingView · Sep 23, 2026
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Cochrane evidence to inform OpenEvidence usersCochrane.org · Mar 3, 2026
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How this is researched

Researched from public pages: press, interviews, the company's site and the founder's own posts. Each source logo links the page that states the row; anything we couldn't source is left out. The archetype is our reading of that record, from a fixed set so founders can be compared. Updated Oct 12, 2026.