§ The result
2 points separate UKG and Mercer | Mettl.
UKG (ATS-integrated) edges Mercer | Mettl (Assessment) by 2 points under rubric v1.0, 44 to 42. UKG leads 5 of the 7 criteria, including Article 11 Technical Documentation, while Mercer | Mettl leads 1, including Bias Audit Transparency, and 1 is level. Bias Audit Transparency is at once the widest raw gap and the heaviest weighted swing, and it belongs to Mercer | Mettl — Mercer | Mettl 42, UKG 30, on an 18% weight — which is 100% of the weighted advantage Mercer | Mettl holds across the 1 criterion 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
UKG
UKG is an enterprise HCM and workforce-management suite whose UKG Pro Recruiting applicant-tracking module, augmented by the embedded Bryte AI layer, drafts job descriptions and produces profile-match candidate scores to rank and shortlist applicants.
§ The record
Mercer | Mettl is filed under Assessment AI, UKG under ATS-integrated AI. They also share 1 secondary category: Screening.
Both are in scope of NYC LL 144, Illinois HB 3773, EU AI Act and Colorado AI Act. Only Mercer | Mettl is in scope of Mobley v. Workday.
| Record | Mercer | Mettl | UKG |
|---|---|---|
| Price tier | Mid | Enterprise |
| Headquarters | IN | US |
| Founded | 2010 | 2020 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 34% of the movement so far
Bias Audit Transparency
Mercer | Mettl 42 · UKG 30
2.2 weighted points to Mercer | Mettl
20% weight · 65% of the movement so far
Article 11 Technical Documentation
Mercer | Mettl 38 · UKG 48
2.0 weighted points to UKG
15% weight · 81% of the movement so far
FRIA Support
Mercer | Mettl 28 · UKG 35
1.1 weighted points to UKG
12% weight · 94% of the movement so far
Human Oversight Design
Mercer | Mettl 45 · UKG 52
0.8 weighted points to UKG
8% weight · 98% of the movement so far
Customer Documentation
Mercer | Mettl 52 · UKG 55
0.2 weighted points to UKG
15% weight · 100% of the movement so far
Data Governance Disclosure
Mercer | Mettl 55 · UKG 56
0.1 weighted points to UKG
Weighted delta is the raw difference times the criterion weight, so the 6 figures above sum to -2.1 — the difference between the two totals before either is rounded. Shares are of 6.4 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads -2 beside that -2.1.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Mercer | Mettl minus UKG.
| Category | Weight | Mercer | Mettl | UKG | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 38 | 48 | -10 | -2.0 |
| Bias Audit Transparency | 18% | 42 | 30 | +12 | +2.2 |
| FRIA Support | 15% | 28 | 35 | -7 | -1.1 |
| Data Governance Disclosure | 15% | 55 | 56 | -1 | -0.1 |
| Human Oversight Design | 12% | 45 | 52 | -7 | -0.8 |
| Post-Market Monitoring | 12% | 38 | 38 | - | - |
| Customer Documentation | 8% | 52 | 55 | -3 | -0.2 |
| Total | 100% | 42 (F) | 44 (F) | -2 | -2.1 |
§ 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 | UKG | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 0 | 1 | — | 0 | 2 | — |
| FRIA Support | 15% | 1 | 1 | — | 1 | 1 | Sources on the vendor's own domain |
| Data Governance Disclosure | 15% | 2 | 0 | Sources on the vendor's own domain | 2 | 0 | Audit reportSources on the vendor's own domain |
| Human Oversight Design | 12% | 2 | 0 | Sources on the vendor's own domain | 0 | 2 | — |
| 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% | 1 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 9 | 5 | Sources on the vendor's own domain | 6 | 8 | 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; UKG has 14 evidence rows across 7 of 7 criteria — 6 with a source URL, 8 documented absences.
Provenance
The scores above are documented by 28 evidence rows on file for these two vendors: 14 for Mercer | Mettl, across 2 distinct source domains, and 14 for UKG, across 2 distinct source domains.
- Rubric
- v1.0
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
- UKG 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