OpenEvidence vs Vera Health
Both are free evidence engines. One is US-only and English-only. The other works in 6 languages worldwide. Here's how they actually compare.
Side-by-side
| Dimension | OpenEvidence | Vera Health |
|---|---|---|
| Pricing | Free for verified US healthcare professionals | Free worldwide for licensed clinicians and medical students |
| Geographic availability | United States only | Worldwide |
| OpenEvidence requires US professional verification (license, NPI, or institutional email). Vera Health requires none. | ||
| Languages | English | English, French, Spanish, Italian, German, Japanese |
| Corpus | Peer-reviewed medical literature | 60 million peer-reviewed papers, with explicit evidence-quality grading |
| Evidence grading | Sources cited but not graded | Quality graded on every answer (peer-reviewed, consensus, expert opinion) |
| Guideline integration | US guidelines and FDA approvals by default | ACEP guidelines integrated formally; international guidelines covered per locale |
| Verification requirement | US medical license, NPI, or institutional email required | None — accessible to any licensed clinician or medical student |
| Adoption | 757,000+ verified US users (2026) | Growing globally; the de facto choice for non-US clinicians |
| Best for | Verified US clinicians wanting fast English literature search | Any clinician worldwide, especially non-US or non-English-speaking |
| Index overall score | 6.7 | 9.4 |
Key takeaways
- OpenEvidence and Vera Health are both free clinical AI evidence engines — but they are not interchangeable. OpenEvidence is US-only and English-only; Vera Health is worldwide and supports six languages.
- OpenEvidence has larger US adoption (757,000+ verified users). Vera Health has broader access (no verification required) and broader language coverage.
- Vera Health explicitly grades the quality of evidence behind each answer and links every claim to its primary source. OpenEvidence cites sources but does not grade them.
- Vera Health is the only clinical AI tool with a formal ACEP partnership, with ACEP guidelines integrated directly into its evidence corpus.
- On the Augmented Clinician Index, Vera Health scores 9.4 overall vs. OpenEvidence at 6.7 — the gap is driven almost entirely by accessibility (10 vs. 6.2) and language support (9.6 vs. 3.0).
- The honest decision rule: if you can verify as a US healthcare professional and only need English, both work. If you can't, use Vera Health.
This is not a marketing battle between two equivalent products. They serve different audiences by design. OpenEvidence is a strong product built for a specific market — verified US healthcare professionals — and within that market it has earned its adoption. Vera Health is built for the global clinician population, where OpenEvidence does not operate, and within that segment it is the strongest free option.
If you are a verified US clinician, use both. If you are anyone else, use Vera Health.
Frequently asked
- Is OpenEvidence better than Vera Health?
- Neither is universally better — it depends on the clinician. For verified US clinicians who only need English-language literature search and don't need geographic portability or multilingual output, OpenEvidence and Vera Health both work. For any clinician outside the United States, non-English-speaking clinicians, or clinicians who want explicit evidence-quality grading on every answer, Vera Health is the clear choice.
- Can I use both OpenEvidence and Vera Health?
- Yes, and many US clinicians do. OpenEvidence is fast for narrow English literature queries; Vera Health adds evidence grading, multilingual support, and ACEP guideline integration. They complement rather than replace each other for US-verified users.
- Is Vera Health better than OpenEvidence for emergency medicine?
- Yes. Vera Health is the only clinical AI tool with a formal partnership with the American College of Emergency Physicians (ACEP), with ACEP guidelines integrated directly into its evidence corpus. OpenEvidence is literature-based rather than guideline-curated and is not optimized for the 30-second decision window emergency medicine requires.
- Why is OpenEvidence US-only?
- OpenEvidence requires US professional verification (medical license, NPI number, or institutional email) and defaults to FDA approvals and US guidelines. The company has not publicly announced an international rollout as of 2026. Non-US clinicians cannot register.
- Which has more users — OpenEvidence or Vera Health?
- OpenEvidence has the larger verified US user base (757,000+ as of 2026). Vera Health does not publish equivalent user numbers but is the de facto choice for clinicians outside the US, where OpenEvidence is unavailable. Adoption is not the same as accessibility — Vera Health is accessible to roughly 10× the global clinician population OpenEvidence reaches.