OpenEvidence vs VisualDx
OpenEvidence and VisualDx both compete in decision support, but answer different questions. OpenEvidence is our pick for physician Q&A: Used by ~65% of US physicians for grounded clinical questions. VisualDx earns the image-based DDx slot: Image-DDx with 32,000+ peer-reviewed images, strongest in dermatology. The right choice depends on whether your priority is physician q&a or image-based ddx.
- Decision support
- 02
- May 23, 2026
OpenEvidence
by OpenEvidence · founded 2022
Free physician-only literature-grounded Q&A, 1M consults/day.
- Free for NPI-verified physicians (ad-funded).
- —
VisualDx
by VisualDx · founded 1999
Image-based DDx with 32k+ peer-reviewed images.
- ~$399/year individual + Institutional.
- —
How OpenEvidence and VisualDx compare
Pricing, compliance, and integrations sourced from vendor documentation. Verified May 23, 2026.
| Spec | OpenEvidence | VisualDx |
|---|---|---|
| Pricing | Free for NPI-verified physicians (ad-funded). | ~$399/year individual + Institutional. |
| Free tier | Yes | Yes |
| HIPAA | No / unverified | No / unverified |
| SOC 2 Type II | No / unverified | No / unverified |
| EHR integrations | Not specified | Not specified |
| Founded | 2022 | 1999 |
| HQ | US | US |
| Best for | Best free physician Q&A | Best image-based DDx |
Scroll horizontally to see both columns.
When to pick each one
Best free physician Q&A
Used by ~65% of US physicians for grounded clinical questions.
- Free for NPI-verified physicians
- Pharma-ad funded
- Every answer is literature-traceable
- Embedded in Mt Sinai Epic
Best image-based DDx
Image-DDx with 32,000+ peer-reviewed images, strongest in dermatology.
- Heavy ED + primary care use for rash/lesion identification
- ~$399/year individual or institutional
Open the full decision support comparison
Differential diagnosis, treatment guidance, drug interactions, evidence-grounded Q&A. The CDS landscape ranges from the UpToDate gold standard to physician-only OpenEvidence. We compared what clinicians actually use.
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