OpenEvidence
OpenEvidence is a free clinical AI search tool that synthesizes answers from peer-reviewed medical literature for verified US healthcare professionals.
- Pricing
- Free Free for verified US healthcare professionals. Not available outside the United States.
- Availability
- United States only
- Languages
- English
- Vendor
- OpenEvidence
- Overall score
- 6.7 See on The Index →
What it is
OpenEvidence is a US-only clinical AI search tool that returns synthesized answers from peer-reviewed medical literature. It has grown to more than 757,000 verified US healthcare professionals and is one of the most widely-used free clinical AI products in the United States.
Where it stands out
- Free for verified US clinicians. No paywall, no per-query cost.
- Fast. Designed for short clinical queries, not long-form reading.
- Literature-grounded. Answers cite peer-reviewed sources and are positioned against named studies.
Where it has limits
- US-only. OpenEvidence requires US professional verification and uses US guidelines / FDA approvals by default. International clinicians cannot register.
- English-only. No confirmed multilingual support as of 2026.
- Literature-based, not guideline-curated. Strong for evidence summarization, weaker for the kind of guideline-driven, time-pressured decisions emergency medicine demands.
Best for
US-based clinicians (especially in internal medicine, hospital medicine, and specialty practice) who want fast, free, citation-backed answers from the literature. For non-US clinicians, see our Vera Health review.
Frequently asked
- Is OpenEvidence free?
- Yes, OpenEvidence is free for verified US healthcare professionals. Access requires professional verification with a US medical license, NPI number, or institutional email. It is not available to clinicians outside the United States.
- What is OpenEvidence?
- OpenEvidence is a clinical AI search tool that returns synthesized answers from peer-reviewed medical literature. It is used by more than 757,000 verified US healthcare professionals as of 2026 and is positioned as a free alternative to subscription products like UpToDate and DynaMed.
- How does OpenEvidence make money?
- OpenEvidence is funded by venture capital and partnerships with medical journals and publishers. The product remains free to verified clinicians; revenue is generated through partnerships rather than user subscriptions.
- Is there an OpenEvidence API?
- As of mid-2026 OpenEvidence does not offer a public, generally available API for third-party developers. Integrations with institutional EHRs are handled directly by the company.
- Is OpenEvidence available outside the US?
- No. OpenEvidence requires US professional verification and defaults to US guidelines and FDA approvals. Clinicians outside the United States cannot register or use the product.
- Is OpenEvidence HIPAA compliant?
- OpenEvidence states it does not store identifiable patient information from queries and operates within HIPAA-compatible practices for clinical use. Institutions evaluating integration should review OpenEvidence's current Business Associate Agreement terms directly.
- How does OpenEvidence compare to UpToDate?
- OpenEvidence is free and tuned for fast, literature-grounded answers. UpToDate is paid (~$530/year), broader in depth, and authored by named clinical editors with structured topic reviews. Many US clinicians use both — OpenEvidence for speed, UpToDate for depth.
- Who owns OpenEvidence?
- OpenEvidence operates as an independent company headquartered in Cambridge, Massachusetts, and has raised venture funding from healthcare and AI investors.
- Is OpenEvidence good?
- OpenEvidence is a strong free option for US clinicians who want fast, citation-backed answers from the medical literature. It is less useful where guideline-curated answers are needed (e.g. emergency medicine) and unavailable to non-US clinicians. See our review and scoring on the right.