OpenEvidence Raises $210Mn Series B, Launches DeepConsult AI Agent for Physicians

With this round, the company’s total funding surpasses $300 million, and its valuation rises to $3.5 billion.

AI startup OpenEvidence has raised $210 million in a series B funding round to expand its medical content partnerships and build out its AI-powered medical research platform.

According to the company, this round will surpass $300 million in total funding and raise the company’s valuation to $3.5 billion.

Google Ventures and Kleiner Perkins co-led the round, with participation from Sequoia Capital, Coatue, Conviction, and Thrive. Sequoia had previously led the $75 million series A round in 2025.

Founded in 2022 by Daniel Nadler, OpenEvidence provides an AI-based medical search engine and generative AI chatbot tailored for physicians. The company reports that more than 40% of U.S. physicians now use its platform, with users spanning over 10,000 hospitals and medical centers nationwide. OpenEvidence claims over 8.5 million monthly clinical consultations, marking a 2,000% year-over-year growth.

Its chatbot, free for physicians, has grown mainly through word-of-mouth. “Streaming as a concept, or the technology involved in streaming, has now been pretty commoditized. These copilots will eventually get there, but then you differentiate around content and partnerships,” Nadler said.

The platform has signed multi-year strategic partnerships with the American Medical Association, the New England Journal of Medicine, and all eleven JAMA specialty journals. “If you're a doctor, and you want to ask a question on OpenEvidence, that same question on ChatGPT, for example, is going to pull a generic answer, maybe from the abstract that it scraped from the public Internet,” Nadler noted.

The company also announced the launch of DeepConsult, an AI agent designed for advanced medical research. Described as a “digital twin of a PhD-level researcher,” DeepConsult can generate comprehensive research reports by analyzing hundreds of peer-reviewed studies within hours. It is offered free to all verified U.S. clinicians.

“At a time when U.S. healthcare faces the dual challenges of clinician burnout and a projected physician shortfall of nearly 100,000 by 2030, the question of AI's role in bridging the gap is paramount,” said Nadler.

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