OpenEvidence is a US company operating an AI medical-search and reference platform for physicians, described in coverage as a "ChatGPT for doctors." As of April 2026 the platform was used by roughly 65% of US doctors across about 27 million clinical encounters in a month, with roughly 650,000 active US physicians and 1.2 million international users; 60% of queries concerned clinical decision-making. The tool is free for credentialed users and ad-supported. CEO Daniel Nadler said, "We did the hardest thing in the history of American health care…We got the majority of American doctors to all voluntarily adopt a single technology platform" (Source: nbcnews.com).
Reported concerns include hallucinations, the lack of rigorous patient-impact studies, and deskilling; MaineHealth asks clinicians to refrain from entering protected health information (Source: nbcnews.com).
On September 22, 2026 OpenEvidence and Anthropic announced a free, specialized version of OpenEvidence's clinical decision-support tool for physicians in about 100 low- and middle-income countries, including Uganda, Angola, Sudan, Haiti and Mongolia; Anthropic's technology provides back-end support and OpenEvidence tailors the tool by region, and financial terms were not disclosed. Founder Daniel Nadler said U.S. clinicians consulted the platform 42 million times in August 2026 (Source: reuters.com).
Snapshot
Valuation
| Date | Valuation | Notes | Source |
|---|---|---|---|
| 2026-07-17 | ~$20B (considering raise of ~$200M) | Separate acquisition talks with a large technology company also reported | theinformation.com |
| ~2026-Q1 | $12B ($700M raised) | Sequoia, GV, Nvidia, a16z, Thrive; ~12× valuation increase in just over a year | nbcnews.com |
Revenue
| Date | Figure | Notes | Source |
|---|---|---|---|
| 2026-07-17 | ~$300M annualized | Doubled in seven months; 90% gross margins reported | theinformation.com |
Relationships
- deploys-in: Healthcare — AI Deployment — medical search adopted by a majority of US physicians
- related: Anthropic — back-end technology for the low- and middle-income-country version (September 2026)