Bayesian Health vs VUNO (2026)
Two deterioration models that both run on data the ward already charts, evidenced differently. Bayesian Health holds three large prospective multi site cohort studies with a major academic health system and treated whether clinicians actually respond as part of the system rather than as the hospital's problem, which is the failure this category usually assumes away. VUNO predicts in hospital cardiac arrest within a day from four named vital signs, with independent multicentre validation across several tertiary hospitals and a precisely stated input and output. For a United States hospital Bayesian is the better evidenced and more configurable choice. VUNO's precision about what goes in and what comes out is worth borrowing as a standard, and its Korean validation needs local confirmation before deployment.
- It publishes the first subgroup performance reporting located for any deterioration vendor in this index, and names its architecture plainly.
- Three large prospective multi site cohort studies with a major academic health system, which is the strongest clinical evidence base here.
- It engaged with clinician response as part of the system rather than as the hospital's problem.
- It predicts in hospital cardiac arrest within a day from four vital signs the ward already charts, so nothing new has to be collected.
- Independent multicentre validation across several tertiary hospitals addresses site level generalisability better than most models here.
- Inputs and outputs are stated precisely, four named vital signs producing a bounded score over a defined horizon.
This comparison is published by AI Health Index, an independent research platform that compares healthcare AI vendors objectively. Bayesian Health and VUNO 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 | Bayesian Health | VUNO |
|---|---|---|
| Primary category | Inpatient Deterioration & Risk Monitoring | Clinical Decision Support |
| Founded | 2018 | 2014 |
| Headquarters | New York, New York, United States | Seoul, South Korea |
| Website | bayesianhealth.com | vuno.co |
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 Bayesian Health its top capability grade on several axes, including AI Centrality, Autonomy and Oversight Model and Model and Technology Transparency. Set against VUNO, Bayesian Health grades higher on several axes, including Autonomy and Oversight Model, Model and Technology Transparency and Security Certifications and Trust Center. Its thinnest published disclosure sits on 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, August 2026
The AI Health Index awards VUNO its top capability grade on AI Centrality and Clinical and Operational Evidence. Set against Bayesian Health, VUNO does not grade higher on any scored axis, though the two are level on several axes, including AI Centrality, Model Supply Chain Disclosure and Clinical and Operational Evidence. Its thinnest published disclosure sits on 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, August 2026
Questions buyers ask
Should we choose Bayesian Health or VUNO?
The AI Health Index grades Bayesian Health higher than VUNO on every axis that separates them, several axes, including Autonomy and Oversight Model, Model and Technology Transparency and Security Certifications and Trust Center. VUNO does not grade higher on any scored axis.
Where do Bayesian Health and VUNO differ most?
The widest separation the AI Health Index records between Bayesian Health and VUNO is on Autonomy and Oversight Model, where Bayesian Health grades A and VUNO grades B. 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 Bayesian Health and VUNO grade the same?
The AI Health Index grades Bayesian Health and VUNO the same on several axes, including AI Centrality, Model Supply Chain Disclosure and Clinical and Operational Evidence. 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 Bayesian Health and VUNO not disclosed?
At the last review, at least one of Bayesian Health and VUNO published thin or absent detail on Model Supply Chain Disclosure. 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.
Both models run on data the ward already collects, which makes local revalidation the practical requirement rather than an optional extra: VUNO's validation is Korean and baseline vital sign distributions, staffing ratios and escalation practices differ enough that performance should be confirmed locally. Bayesian Health publishes no security attestation, business associate posture, hosting terms or pricing. Neither publishes an alert burden per patient day, which determines whether either survives contact with a working ward.