Mario Aguilar covers technology in health care, including artificial intelligence, virtual reality, wearable devices, telehealth, and digital therapeutics. His stories explore how tech is changing the practice of health care and the business and policy challenges to realizing tech’s promise. He’s also the co-author of the free, twice weekly STAT Health Tech newsletter. You can reach Mario on Signal at mariojoze.13.

OpenEvidence, maker of a popular chatbot that helps doctors search clinical evidence, on Wednesday announced $250 million in new funding.

The new round led by Thrive Capital and DST Global values OpenEvidence at $12 billion, and the company has announced $735 million in funding in the last 12 months. OpenEvidence is free to use by any clinician with a national provider identifier number. The company’s primary business model is advertising shown to clinicians. 

Founded in 2022, OpenEvidence is one of the most prominent and best-funded companies from a wave of health artificial intelligence companies that emerged since the widespread availability of large language models. Reflecting on the eye-popping fundraising for health AI, a Silicon Valley Bank report released earlier in January raised an eyebrow at the ability of companies like OpenEvidence to deliver on their stratospheric valuations with advertising and software-as-a-service business models. “It won’t be a surprise to see them tap the value of the data they’re already collecting” to offer more services to pharma or other customers, the authors wrote.

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