§ The result
Mercer | Mettl leads TestDome by 5 points.
Inside the Assessment cohort, rubric v1.0 puts Mercer | Mettl on 42 and TestDome on 37, 5 points apart. The criteria split evenly, 3 each to Mercer | Mettl and TestDome, with 1 level, and the weighted points on the side Mercer | Mettl holds, headed by Bias Audit Transparency, settle the total. Bias Audit Transparency is both the widest raw gap and the heaviest weighted swing — Mercer | Mettl 42, TestDome 15 — and at an 18% weight it carries 74% of the weighted advantage Mercer | Mettl holds across the 3 criteria on that side of the table.
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.
Vendor profile
TestDome
TestDome sells pay-per-candidate online skills tests for coding, Excel and more than 100 other skills. The tests are scored automatically, and open-ended answers can be scored by AI. AI analysis of webcam and screen proctoring recordings flags possible cheating, and a live code-interview tool is included.
§ The record
Mercer | Mettl and TestDome are both filed under Assessment AI. They also share 1 secondary category: Screening.
Both are in scope of NYC LL 144, Illinois HB 3773, EU AI Act, Colorado AI Act and Mobley v. Workday.
| Record | Mercer | Mettl | TestDome |
|---|---|---|
| Price tier | Mid | Low |
| Headquarters | IN | HR |
| Founded | 2010 | 2013 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 58% of the movement so far
Bias Audit Transparency
Mercer | Mettl 42 · TestDome 15
4.9 weighted points to Mercer | Mettl
12% weight · 69% of the movement so far
Post-Market Monitoring
Mercer | Mettl 38 · TestDome 30
1.0 weighted points to Mercer | Mettl
12% weight · 79% of the movement so far
Human Oversight Design
Mercer | Mettl 45 · TestDome 52
0.8 weighted points to TestDome
15% weight · 88% of the movement so far
Data Governance Disclosure
Mercer | Mettl 55 · TestDome 50
0.8 weighted points to Mercer | Mettl
8% weight · 95% of the movement so far
Customer Documentation
Mercer | Mettl 52 · TestDome 60
0.6 weighted points to TestDome
20% weight · 100% of the movement so far
Article 11 Technical Documentation
Mercer | Mettl 38 · TestDome 40
0.4 weighted points to TestDome
Weighted delta is the raw difference times the criterion weight, so the 6 figures above sum to +4.7 — the difference between the two totals before either is rounded. Shares are of 8.4 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +5 beside that +4.7.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Mercer | Mettl minus TestDome.
| Category | Weight | Mercer | Mettl | TestDome | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 38 | 40 | -2 | -0.4 |
| Bias Audit Transparency | 18% | 42 | 15 | +27 | +4.9 |
| FRIA Support | 15% | 28 | 28 | - | - |
| Data Governance Disclosure | 15% | 55 | 50 | +5 | +0.8 |
| Human Oversight Design | 12% | 45 | 52 | -7 | -0.8 |
| Post-Market Monitoring | 12% | 38 | 30 | +8 | +1.0 |
| Customer Documentation | 8% | 52 | 60 | -8 | -0.6 |
| Total | 100% | 42 (F) | 37 (F) | +5 | +4.7 |
§ 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 | Mercer | Mettl | TestDome | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Sources on the vendor's own domain | 3 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 0 | 1 | — | 3 | 1 | — |
| FRIA Support | 15% | 1 | 1 | — | 1 | 1 | — |
| Data Governance Disclosure | 15% | 2 | 0 | Sources on the vendor's own domain | 5 | 0 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 2 | 0 | Sources on the vendor's own domain | 6 | 0 | Sources on the vendor's own domain |
| Post-Market Monitoring | 12% | 1 | 1 | Sources on the vendor's own domain | 5 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 1 | 1 | Sources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 9 | 5 | Sources on the vendor's own domain | 27 | 5 | Sources on the vendor's own domain |
Mercer | Mettl has 14 evidence rows across 7 of 7 criteria — 9 with a source URL, 5 documented absences; TestDome has 31 evidence rows across 7 of 7 criteria — 27 with a source URL, 5 documented absences.
Provenance
The scores above are documented by 45 evidence rows on file for these two vendors: 14 for Mercer | Mettl, across 2 distinct source domains, and 31 for TestDome, across 1 distinct source domain.
- Rubric
- v1.0
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
- TestDome last reviewed
- September 25, 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