§ The result
3 points separate Testlify and Mercer | Mettl.
Under rubric v1.0, Testlify and Mercer | Mettl finish 3 points apart, 45 to 42, as two Assessment entries. Mercer | Mettl takes 1 of the 7 criteria, Bias Audit Transparency among them, against 5 for Testlify, whose share includes Article 11 Technical Documentation, and 1 is level. One criterion, Article 11 Technical Documentation, is both the widest raw gap (Mercer | Mettl 38, Testlify 52) and the heaviest weighted swing, and at 20% weight it makes up 48% of the weighted advantage Testlify holds across the 5 criteria it leads.
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
Testlify
Testlify is a skills-assessment and AI-interviewing platform that ranks candidates on a scored leaderboard from pre-built or AI-generated tests, with an AI résumé screener, AI-scored video, voice and chat interviews, and AI-assisted proctoring.
§ The record
Mercer | Mettl and Testlify are both filed under Assessment AI. They also share 2 secondary categories: Video interview and 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 | Testlify |
|---|---|---|
| Price tier | Mid | Low |
| Headquarters | IN | US |
| Founded | 2010 | 2022 |
§ What decides it
The criteria that move the gap, heaviest swing first.
20% weight · 35% of the movement so far
Article 11 Technical Documentation
Mercer | Mettl 38 · Testlify 52
2.8 weighted points to Testlify
18% weight · 62% of the movement so far
Bias Audit Transparency
Mercer | Mettl 42 · Testlify 30
2.2 weighted points to Mercer | Mettl
12% weight · 77% of the movement so far
Human Oversight Design
Mercer | Mettl 45 · Testlify 55
1.2 weighted points to Testlify
15% weight · 86% of the movement so far
FRIA Support
Mercer | Mettl 28 · Testlify 33
0.8 weighted points to Testlify
8% weight · 94% of the movement so far
Customer Documentation
Mercer | Mettl 52 · Testlify 60
0.6 weighted points to Testlify
12% weight · 100% of the movement so far
Post-Market Monitoring
Mercer | Mettl 38 · Testlify 42
0.5 weighted points to Testlify
Weighted delta is the raw difference times the criterion weight, so the 6 figures above sum to -3.7 — the difference between the two totals before either is rounded. Shares are of 8.0 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads -3 beside that -3.7.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Mercer | Mettl minus Testlify.
| Category | Weight | Mercer | Mettl | Testlify | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 38 | 52 | -14 | -2.8 |
| Bias Audit Transparency | 18% | 42 | 30 | +12 | +2.2 |
| FRIA Support | 15% | 28 | 33 | -5 | -0.8 |
| Data Governance Disclosure | 15% | 55 | 55 | - | - |
| Human Oversight Design | 12% | 45 | 55 | -10 | -1.2 |
| Post-Market Monitoring | 12% | 38 | 42 | -4 | -0.5 |
| Customer Documentation | 8% | 52 | 60 | -8 | -0.6 |
| Total | 100% | 42 (F) | 45 (F) | -3 | -3.7 |
§ 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 | Testlify | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Sources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 0 | 1 | — | 3 | 1 | Sources on the vendor's own domain |
| FRIA Support | 15% | 1 | 1 | — | 2 | 1 | Sources on the vendor's own domain |
| Data Governance Disclosure | 15% | 2 | 0 | Sources on the vendor's own domain | 6 | 0 | Audit reportSources 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 | 5 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 9 | 5 | Sources on the vendor's own domain | 31 | 5 | Audit reportSources 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; Testlify has 36 evidence rows across 7 of 7 criteria — 31 with a source URL, 5 documented absences.
Provenance
The scores above are documented by 50 evidence rows on file for these two vendors: 14 for Mercer | Mettl, across 2 distinct source domains, and 36 for Testlify, across 1 distinct source domain.
- Rubric
- v1.0
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
- Testlify 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