Eleos Health vs Mentalyc (2026)
The category's clearest enterprise against solo split, and it trades published evidence against published privacy. Eleos is the enterprise platform with the deepest evidence base of any documentation adjacent vendor here, a randomised trial plus a 2.83 million micro dialogue accuracy study, the broadest setting coverage including substance use disorder and field care, and a checkable 80 percent acceptance rate. Its gaps are commercial and disclosural: gated pricing, and no located security attestation or data stewardship position. Mentalyc is the solo priced tool that carries exactly what Eleos lacks, a completed SOC 2 Type II, HIPAA and PHIPA, and an explicit commitment not to train on client data or retain recordings, the disclosures that matter most for therapy audio. If you are an enterprise behavioral health organisation that needs published evidence and broad coverage, start with Eleos. If you are a solo or small practice where data stewardship and transparent pricing decide it, start with Mentalyc.
- The deepest published evidence base of any documentation adjacent vendor in the index, graded A: a randomised clinical trial in the Journal of Medical Internet Research, a machine learning study on homework assignment, and a real world accuracy study across more than 2.83 million micro dialogues, where Mentalyc has no peer reviewed study located and grades C.
- The broadest coverage in the category, graded A on setting: behavioral health, substance use disorder treatment, and home health across office, telehealth, and field based settings, serving clinicians, supervisors, leadership, and compliance teams, where Mentalyc stays within outpatient psychotherapy.
- A checkable autonomy claim, graded A: the company publishes an approximate 80 percent suggestion acceptance rate, quantifying how much human correction the workflow requires, where Mentalyc publishes no edit burden figure.
- The strongest data stewardship in behavioral health, graded A: Mentalyc states plainly it does not train on client data and does not retain recordings, the specific commitments Eleos does not publish, leaving Eleos unrated on PHI stewardship.
- A completed security attestation and jurisdictional compliance, graded A: SOC 2 Type II plus HIPAA and PHIPA for Canada, where Eleos has no located third party attestation.
- Published solo to group pricing with no sales gate, graded A on commercial transparency, where Eleos gates pricing and grades C, and recording is optional across multiple input methods.
This comparison is published by AI Health Index, an independent research platform that compares healthcare AI vendors objectively. Eleos Health and Mentalyc 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 | Eleos Health | Mentalyc |
|---|---|---|
| Primary category | Behavioral Health AI | Behavioral Health AI |
| Founded | 2019 | Not recorded |
| Headquarters | Boston, Massachusetts, United States | New York, New York, United States |
| Website | eleos.health | mentalyc.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 Eleos Health its top capability grade on several axes, including AI Centrality, Autonomy and Oversight Model and Clinical and Operational Evidence. Set against Mentalyc, Eleos Health grades higher on several axes, including Autonomy and Oversight Model, Model and Technology Transparency and Model Supply Chain Disclosure. 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, July 2026
The AI Health Index awards Mentalyc its top capability grade on several axes, including AI Centrality, AI Safety and PHI Stewardship and HIPAA and BAA Posture. Set against Eleos Health, Mentalyc grades higher on Commercial Transparency. 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, July 2026
Questions buyers ask
Should we choose Eleos Health or Mentalyc?
On the axes where the AI Health Index separates them, Eleos Health grades higher on several axes, including Autonomy and Oversight Model, Model and Technology Transparency and Model Supply Chain Disclosure, and Mentalyc grades higher on Commercial Transparency. Eleos 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 Eleos Health and Mentalyc differ most?
The widest separation the AI Health Index records between Eleos Health and Mentalyc is on Clinical and Operational Evidence, where Eleos Health grades A and Mentalyc 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 Eleos Health and Mentalyc grade the same?
The AI Health Index grades Eleos Health and Mentalyc the same on several axes, including AI Centrality, AI Safety and PHI Stewardship 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 Eleos Health and Mentalyc not disclosed?
At the last review, at least one of Eleos Health and Mentalyc 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 Ambient Scribes page.
These sit at opposite ends of the category and serve different buyers, which makes the comparison unusually clean. Eleos is the enterprise platform whose distinguishing feature is genuine published clinical evidence, including a randomised trial that is rare anywhere in this index, though a buyer should carry the caveat that the RCT is small at 47 participants and single site, a feasibility study whose headline multiples are quoted in marketing without that qualifier.
Mentalyc is the solo priced tool whose distinguishing feature is the clearest privacy and security posture in behavioral health, the completed SOC 2 Type II and the explicit no training and no retention stance Eleos lacks. That is the surprising inversion in this category: the cheaper tool carries the stronger attestations while the enterprise platform carries the stronger evidence. Both grade C on governance for unexamined speech model performance.