§ The result
4 points separate Korn Ferry and Mercer | Mettl.
Within the Assessment cohort, Korn Ferry edges Mercer | Mettl by 4 points under rubric v1.0, 46 to 42. Korn Ferry and Mercer | Mettl each lead 3 of the 7 criteria, with 1 level, though the side of the split Korn Ferry holds (headed by Article 11 Technical Documentation) adds up to more weighted points. Article 11 Technical Documentation is both the widest raw gap and the heaviest weighted swing — Korn Ferry 58, Mercer | Mettl 38 — and at a 20% weight it carries 68% of the weighted advantage Korn Ferry holds across the 3 criteria on that side of the table.
Vendor profile
Korn Ferry
Korn Ferry provides psychometric talent assessments (Korn Ferry Assess, the KF4D Four Dimensional assessment, KFALP leadership-potential assessment, and the Leadership Architect competency framework) used to evaluate candidates' personality, competencies, drivers, and cognitive ability for selection, promotion, and development decisions.
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
Korn Ferry and Mercer | Mettl 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 | Korn Ferry | Mercer | Mettl |
|---|---|---|
| Price tier | Enterprise | Mid |
| Headquarters | US | IN |
| Founded | 1969 | 2010 |
§ What decides it
The criteria that move the gap, heaviest swing first.
20% weight · 54% of the movement so far
Article 11 Technical Documentation
Korn Ferry 58 · Mercer | Mettl 38
4.0 weighted points to Korn Ferry
18% weight · 68% of the movement so far
Bias Audit Transparency
Korn Ferry 48 · Mercer | Mettl 42
1.1 weighted points to Korn Ferry
12% weight · 80% of the movement so far
Human Oversight Design
Korn Ferry 52 · Mercer | Mettl 45
0.8 weighted points to Korn Ferry
12% weight · 88% of the movement so far
Post-Market Monitoring
Korn Ferry 33 · Mercer | Mettl 38
0.6 weighted points to Mercer | Mettl
15% weight · 94% of the movement so far
FRIA Support
Korn Ferry 25 · Mercer | Mettl 28
0.4 weighted points to Mercer | Mettl
15% weight · 100% of the movement so far
Data Governance Disclosure
Korn Ferry 52 · Mercer | Mettl 55
0.4 weighted points to Mercer | Mettl
Weighted delta is the raw difference times the criterion weight, so the 6 figures above sum to +4.4 — the difference between the two totals before either is rounded. Shares are of 7.4 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +4 beside that +4.4.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Korn Ferry minus Mercer | Mettl.
| Category | Weight | Korn Ferry | Mercer | Mettl | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 58 | 38 | +20 | +4.0 |
| Bias Audit Transparency | 18% | 48 | 42 | +6 | +1.1 |
| FRIA Support | 15% | 25 | 28 | -3 | -0.4 |
| Data Governance Disclosure | 15% | 52 | 55 | -3 | -0.4 |
| Human Oversight Design | 12% | 52 | 45 | +7 | +0.8 |
| Post-Market Monitoring | 12% | 33 | 38 | -5 | -0.6 |
| Customer Documentation | 8% | 52 | 52 | - | - |
| Total | 100% | 46 (F) | 42 (F) | +4 | +4.4 |
§ 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 | Korn Ferry | Mercer | Mettl | ||||
|---|---|---|---|---|---|---|---|
| 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% | 1 | 1 | Sources on the vendor's own domain | 0 | 1 | — |
| FRIA Support | 15% | 0 | 1 | — | 1 | 1 | — |
| Data Governance Disclosure | 15% | 2 | 1 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 2 | 1 | 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 | 1 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 2 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 10 | 7 | Sources on the vendor's own domain | 9 | 5 | Sources on the vendor's own domain |
Korn Ferry has 17 evidence rows across 7 of 7 criteria — 10 with a source URL, 7 documented absences; Mercer | Mettl has 14 evidence rows across 7 of 7 criteria — 9 with a source URL, 5 documented absences.
Provenance
The scores above are documented by 31 evidence rows on file for these two vendors: 17 for Korn Ferry, across 1 distinct source domain, and 14 for Mercer | Mettl, across 2 distinct source domains.
- Rubric
- v1.0
- Korn Ferry last reviewed
- June 7, 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