Glass Health vs OpenEvidence (2026)
Both put a language model between a clinician and the literature, and only one of them takes the patient into account. OpenEvidence answers the clinical question from published evidence and states in its own terms that it is not a diagnostic service, with eleven independent studies behind it and partnerships supplying current primary literature. Glass takes the case description and returns a ranked differential with suggested workups plus a drafted assessment and plan, which is a patient specific output and a materially larger claim, and it is the only one of the two to have submitted itself to an external physician validated safety benchmark. That external evaluation is the strongest thing on either record. The line to keep clear is that answering what the evidence says and telling a clinician what this patient probably has are different products with different obligations attached.
- It was evaluated in an external physician validated clinical safety benchmark run by parties it did not control, and published its placement, which is the strongest independent safety signal in this part of the index.
- Reasoning and documentation happen in one pass, so the differential, the workup suggestions and the drafted note come out of the same encounter rather than two products.
- It states its own weakness plainly, that reasoning is strongest on common presentations and weaker on complex multi system cases, which is a disclosure almost nobody here offers.
- The independent literature is deeper, with a systematic review identifying eleven studies evaluating this product across two years.
- Named partnerships with major journals and a systematic review publisher supply the corpus, and enterprise deployment inside Epic is documented at named health systems.
- It is free to verified United States clinicians with native mobile applications, so a clinician can use it today without any institutional decision.
This comparison is published by AI Health Index, an independent research platform that compares healthcare AI vendors objectively. Glass Health and OpenEvidence are each graded against the same capability taxonomy, from each vendor's own public materials and the regulatory record, under the AI Health Index verification standard. No vendor pays for placement, and no vendor has reviewed this page. How this evidence is graded
Plain facts
| Fact | Glass Health | OpenEvidence |
|---|---|---|
| Primary category | Clinical Decision Support | Clinical Reference & Evidence |
| Founded | 2021 | 2021 |
| Headquarters | San Francisco, California | Miami, Florida |
| Website | glass.health | openevidence.com |
Side by Side
Each record in one paragraph
Written to be quoted whole. Each paragraph states what the AI Health Index verified about the vendor, with the caveats attached. Generated from this pair’s live capability grades, so it moves when a grade moves.
The AI Health Index awards Glass Health its top capability grade on several axes, including AI Centrality, Autonomy and Oversight Model and Model and Technology Transparency. Set against OpenEvidence, Glass Health grades higher on several axes, including Autonomy and Oversight Model, Model and Technology Transparency and Clinical and Operational Evidence. Grades reflect evidence the AI Health Index could verify at the last review, so a low grade records disclosure the vendor has not published rather than a capability it has been shown to lack.
Source: AI Health Index, August 2026
The AI Health Index awards OpenEvidence its top capability grade on AI Centrality and Security Certifications and Trust Center. Set against Glass Health, OpenEvidence grades higher on several axes, including AI Safety and PHI Stewardship, Security Certifications and Trust Center and EHR and Interoperability Depth. Its thinnest published disclosure sits on AI Liability and Recourse. Grades reflect evidence the AI Health Index could verify at the last review, so a low grade records disclosure the vendor has not published rather than a capability it has been shown to lack.
Source: AI Health Index, August 2026
Questions buyers ask
Should we choose Glass Health or OpenEvidence?
On the axes where the AI Health Index separates them, Glass Health grades higher on several axes, including Autonomy and Oversight Model, Model and Technology Transparency and Clinical and Operational Evidence, and OpenEvidence grades higher on several axes, including AI Safety and PHI Stewardship, Security Certifications and Trust Center and EHR and Interoperability Depth. Glass Health leads on the greater share of scored axes, but the split means the decision turns on which constraint is binding rather than on an overall winner.
Where do Glass Health and OpenEvidence differ most?
The widest separation the AI Health Index records between Glass Health and OpenEvidence is on Model and Technology Transparency, where Glass Health grades A and OpenEvidence grades C. That axis sits in the AI Capability group, so it should carry the most weight for a buyer whose binding constraint is how much of the work the model itself is trusted to do.
Where do Glass Health and OpenEvidence grade the same?
The AI Health Index grades Glass Health and OpenEvidence the same on several axes, including AI Centrality, Model Supply Chain Disclosure and HIPAA and BAA Posture. Neither holds an advantage the index can evidence on those axes, so they should not carry weight in a selection between these two.
What have Glass Health and OpenEvidence not disclosed?
At the last review, at least one of Glass Health and OpenEvidence published thin or absent detail on AI Liability and Recourse. The AI Health Index treats an absent disclosure as a gap in the public record rather than a failure of the product, so these are the axes to get in writing during diligence instead of inferring from the grade.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers. The full set for this category is on the Clinical Decision Support page.
The two products stop in different places and that boundary matters legally as well as clinically: one answers what the evidence says with an explicit statement that it is not a diagnostic service, the other produces a ranked differential for a specific patient, which is a patient specific output carrying obligations that a reference answer does not.
Glass publishes no security attestation across repeated searches and no retention or training use position despite processing protected health information at depth. OpenEvidence is funded by pharmaceutical and device advertising displayed beside clinical answers, governed by a published policy worth reading before deployment.