§ The result
Braintrust AIR leads Mercer | Mettl on all 7 criteria.
Under rubric v1.0, Braintrust AIR (Screening) opens a 17-point lead on Mercer | Mettl (Assessment), 59 to 42. Mercer | Mettl leads none of the 7 criteria, and Braintrust AIR is ahead on 3 of them by 20 raw points or more, Bias Audit Transparency among them. The advantage Braintrust AIR holds is spread out: Bias Audit Transparency is both the widest raw gap and the heaviest weighted swing (Braintrust AIR 75, Mercer | Mettl 42, 18% weight), yet it supplies only 35% of the weighted points Braintrust AIR gains across the 7 criteria it leads.
Vendor profile
Braintrust AIR
Braintrust AIR is an enterprise AI interviewer that runs recorded conversational voice interviews, scores the transcribed answers against recruiter-editable rubric criteria, and sends ranked scorecards, transcripts and recordings to the employer's ATS for human review.
Vendor profile
Mercer | Mettl
Mercer | Mettl is an online talent assessment and remote-proctoring platform offering psychometric, aptitude, coding, and skills tests plus AI-assisted exam proctoring and scoring for hiring, certification, and L&D.
§ The record
Braintrust AIR is filed under Screening AI, Mercer | Mettl under Assessment AI. They also share 1 secondary category: Video interview.
Both are in scope of EU AI Act, NYC LL 144, Illinois HB 3773, Colorado AI Act and Mobley v. Workday.
| Record | Braintrust AIR | Mercer | Mettl |
|---|---|---|
| Price tier | Enterprise | Mid |
| Headquarters | US | IN |
| Founded | 2018 | 2010 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 35% of the movement so far
Bias Audit Transparency
Braintrust AIR 75 · Mercer | Mettl 42
5.9 weighted points to Braintrust AIR
20% weight · 59% of the movement so far
Article 11 Technical Documentation
Braintrust AIR 58 · Mercer | Mettl 38
4.0 weighted points to Braintrust AIR
12% weight · 76% of the movement so far
Post-Market Monitoring
Braintrust AIR 62 · Mercer | Mettl 38
2.9 weighted points to Braintrust AIR
12% weight · 88% of the movement so far
Human Oversight Design
Braintrust AIR 62 · Mercer | Mettl 45
2.0 weighted points to Braintrust AIR
15% weight · 94% of the movement so far
FRIA Support
Braintrust AIR 35 · Mercer | Mettl 28
1.1 weighted points to Braintrust AIR
8% weight · 99% of the movement so far
Customer Documentation
Braintrust AIR 63 · Mercer | Mettl 52
0.9 weighted points to Braintrust AIR
15% weight · 100% of the movement so far
Data Governance Disclosure
Braintrust AIR 56 · Mercer | Mettl 55
0.1 weighted points to Braintrust AIR
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +16.9 — the difference between the two totals before either is rounded. Shares are of 16.9 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +17 beside that +16.9.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Braintrust AIR minus Mercer | Mettl.
| Category | Weight | Braintrust AIR | Mercer | Mettl | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 58 | 38 | +20 | +4.0 |
| Bias Audit Transparency | 18% | 75 | 42 | +33 | +5.9 |
| FRIA Support | 15% | 35 | 28 | +7 | +1.1 |
| Data Governance Disclosure | 15% | 56 | 55 | +1 | +0.1 |
| Human Oversight Design | 12% | 62 | 45 | +17 | +2.0 |
| Post-Market Monitoring | 12% | 62 | 38 | +24 | +2.9 |
| Customer Documentation | 8% | 63 | 52 | +11 | +0.9 |
| Total | 100% | 59 (F) | 42 (F) | +17 | +16.9 |
§ Evidence
Cited sources and documented absences, criterion by criterion.
An absence is a finding, not a blank: the reviewer looked for a named artefact and recorded that it is not located. Where a source sits is a fact about hosting only.
| Criterion | Weight | Braintrust AIR | Mercer | Mettl | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 3 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 5 | 0 | Audit reportSources on a separate domain | 0 | 1 | — |
| FRIA Support | 15% | 3 | 1 | Sources on the vendor's own domain | 1 | 1 | — |
| Data Governance Disclosure | 15% | 5 | 0 | Sources on the vendor's own domainSources on a separate domain | 2 | 0 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 5 | 0 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Post-Market Monitoring | 12% | 4 | 0 | Audit reportSources on the vendor's own domainSources on a separate domain | 1 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 4 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 29 | 3 | Audit reportSources on the vendor's own domainSources on a separate domain | 9 | 5 | Sources on the vendor's own domain |
Braintrust AIR has 32 evidence rows across 7 of 7 criteria — 29 with a source URL, 3 documented absences; Mercer | Mettl has 14 evidence rows across 7 of 7 criteria — 9 with a source URL, 5 documented absences; some documentation or audit rows for Braintrust AIR sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 46 evidence rows on file for these two vendors: 32 for Braintrust AIR, across 4 distinct source domains, and 14 for Mercer | Mettl, across 2 distinct source domains.
- Rubric
- v1.0
- Braintrust AIR last reviewed
- September 25, 2026 · HireAIScore editorial team
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
HireAIScore scores are editorial research, not legal advice, and no vendor pays for placement, scoring or removal — see the methodology, conflicts policy and terms.
§ Where next