OpenEvidence Raises $200 Million at $6 Billion Valuation

OpenEvidence, often described as the “ChatGPT for doctors,” has raised $200 million at a $6 billion valuation. Led by Google Ventures, the round saw participation from major venture capital firms like Sequoia Capital, Kleiner Perkins, and Blackstone. Founded just three years ago, OpenEvidence has quickly become a very critical tool for doctors and healthcare professionals across thousands of medical centers.

Since its founding by Daniel Nadler and Zachary Ziegler, OpenEvidence has leveraged advanced natural language processing to synthesize vast amounts of medical research, including peer-reviewed journals like the Journal of the American Medical Association (JAMA) and the New England Journal of Medicine.

This specialization allows clinicians to receive concise, well-referenced clinical answers quickly, removing the time-consuming manual search for information amid an overwhelming volume of medical literature that doubles every 73 days.

The platform has seen explosive adoption, with monthly clinical consultations soaring from 8.5 million in July 2025 to 15 million by October 2025, equivalent to nearly 500,000 queries daily. More than 40% of U.S. physicians reportedly use the platform daily across over 10,000 healthcare facilities, cementing OpenEvidence’s role as an indispensable bedside AI assistant.