OpenEvidence: the $15bn AI start-up reshaping how US doctors treat (opens the source in a new tab)
- OpenEvidence, founded by Daniel Nadler, runs an ad-funded chatbot that searches peer-reviewed journals and clinical guidelines to help doctors diagnose and treat patients.
- Nadler says nearly two-thirds of US physicians use it. It raised money in September at a $15bn valuation, and hospitals including NYU Langone and Mount Sinai have built it into their record systems.
- Evidence on accuracy is mixed: a Mayo Clinic study (Mayo is an investor) found accurate advice, while a June Nature paper found it trailed general models such as Gemini and GPT on clinical benchmarks.
- $15bn
- valuation in September
- 2 in 3
- US doctors use it, per founder
Why it matters When the most-used clinical reference runs on ads, who pays for each answer matters almost as much as how good it is.
Other side Doctors adopted it on their own, which suggests it saves real time; the worry is juniors leaning on it before mastering the basics, and OpenAI and Anthropic are moving in.