§ The result
TestGorilla leads Mercer | Mettl by 5 points.
TestGorilla scores 47 and Mercer | Mettl 42 under rubric v1.0 — a 5-point gap inside the Assessment cohort. TestGorilla leads 5 of the 7 criteria, including Article 11 Technical Documentation, while Mercer | Mettl leads 1, including Bias Audit Transparency, and 1 is level. TestGorilla takes the heaviest weighted swing, Article 11 Technical Documentation at 20% (Mercer | Mettl 38, TestGorilla 52), which is 51% of the weighted advantage TestGorilla holds; the widest raw gap is a different criterion, Human Oversight Design, Mercer | Mettl 45 to TestGorilla 60.
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
TestGorilla
TestGorilla is a pre-employment skills-assessment platform offering a large test library plus AI features for resume scoring, candidate sourcing, and one-way/conversational AI video interviews to support skills-based hiring.
§ The record
Mercer | Mettl and TestGorilla 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 | TestGorilla |
|---|---|---|
| Price tier | Mid | Mid |
| Headquarters | IN | NL |
| Founded | 2010 | 2019 |
§ What decides it
The criteria that move the gap, heaviest swing first.
20% weight · 45% of the movement so far
Article 11 Technical Documentation
Mercer | Mettl 38 · TestGorilla 52
2.8 weighted points to TestGorilla
12% weight · 74% of the movement so far
Human Oversight Design
Mercer | Mettl 45 · TestGorilla 60
1.8 weighted points to TestGorilla
18% weight · 85% of the movement so far
Bias Audit Transparency
Mercer | Mettl 42 · TestGorilla 38
0.7 weighted points to Mercer | Mettl
8% weight · 93% of the movement so far
Customer Documentation
Mercer | Mettl 52 · TestGorilla 58
0.5 weighted points to TestGorilla
15% weight · 98% of the movement so far
FRIA Support
Mercer | Mettl 28 · TestGorilla 30
0.3 weighted points to TestGorilla
15% weight · 100% of the movement so far
Data Governance Disclosure
Mercer | Mettl 55 · TestGorilla 56
0.1 weighted points to TestGorilla
Weighted delta is the raw difference times the criterion weight, so the 6 figures above sum to -4.8 — the difference between the two totals before either is rounded. Shares are of 6.3 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 -4.8.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Mercer | Mettl minus TestGorilla.
| Category | Weight | Mercer | Mettl | TestGorilla | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 38 | 52 | -14 | -2.8 |
| Bias Audit Transparency | 18% | 42 | 38 | +4 | +0.7 |
| FRIA Support | 15% | 28 | 30 | -2 | -0.3 |
| Data Governance Disclosure | 15% | 55 | 56 | -1 | -0.1 |
| Human Oversight Design | 12% | 45 | 60 | -15 | -1.8 |
| Post-Market Monitoring | 12% | 38 | 38 | - | - |
| Customer Documentation | 8% | 52 | 58 | -6 | -0.5 |
| Total | 100% | 42 (F) | 47 (F) | -5 | -4.8 |
§ 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 | TestGorilla | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 0 | 1 | — | 2 | 1 | Sources on the vendor's own domain |
| FRIA Support | 15% | 1 | 1 | — | 1 | 1 | — |
| Data Governance Disclosure | 15% | 2 | 0 | Sources on the vendor's own domain | 3 | 0 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 2 | 0 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Post-Market Monitoring | 12% | 1 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domainSources on a separate domain |
| Customer Documentation | 8% | 1 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 9 | 5 | Sources on the vendor's own domain | 14 | 5 | Sources on the vendor's own domainSources on a separate domain |
Mercer | Mettl has 14 evidence rows across 7 of 7 criteria — 9 with a source URL, 5 documented absences; TestGorilla has 19 evidence rows across 7 of 7 criteria — 14 with a source URL, 5 documented absences; some documentation or audit rows for TestGorilla sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 33 evidence rows on file for these two vendors: 14 for Mercer | Mettl, across 2 distinct source domains, and 19 for TestGorilla, across 2 distinct source domains.
- Rubric
- v1.0
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
- TestGorilla 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