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OpenEvidence

OpenEvidence is a $15bn AI chatbot used by a reported two-thirds of US physicians for clinical decision support, notable for its ad-powered business model. Its rapid adoption has sparked debate over the influence of advertising on patient care.

Importance: 65%Confidence: 75%Mentions: 1Updated: October 21, 2026Page history (1 revision) →

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## Overview OpenEvidence is an AI-powered clinical decision support chatbot valued at $15bn, described as a "viral" AI start-up reshaping how American doctors treat patients (FT, October 21). ## Key Details - The company's founder says two-thirds of US physicians use the ad-powered tool (FT, October 21). - Valued at approximately $15 billion (FT, October 21). - Its ad-supported business model has prompted a debate about patient care and the influence of advertising on clinical decision-making (FT, October 21). ## Why It Matters OpenEvidence represents a significant case study in AI adoption within regulated healthcare settings, raising questions about conflicts of interest in ad-funded clinical tools, liability for AI-assisted medical decisions, and the broader trend of AI penetration into professional decision-making. Its scale of adoption (reportedly two-thirds of US physicians) suggests it could become a focal point for healthcare AI regulation. ## Open Questions - How regulators (FDA, FTC) might respond to an ad-supported clinical tool. - Whether the ad-powered model creates conflicts of interest affecting patient care. - How the company's valuation and growth trajectory will evolve.