§ The result
2 points separate Mercer | Mettl and Paycor.
Mercer | Mettl (Assessment) edges Paycor (ATS-integrated) by 2 points under rubric v1.0, 42 to 40. Mercer | Mettl and Paycor each lead 3 of the 7 criteria, with 1 level, though the side of the split Mercer | Mettl holds (headed by Bias Audit Transparency) adds up to more weighted points. One criterion, Bias Audit Transparency, is both the widest raw gap (Mercer | Mettl 42, Paycor 25) and the heaviest weighted swing, and at 18% weight it makes up 77% of the weighted advantage Mercer | Mettl holds across the 3 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
Paycor
Paycor, a Paychex company, sells a mid-market HR and payroll suite whose recruiting tools include the Paycor Recruiting ATS, Paycor Smart Sourcing (formerly Talenya), which uses AI to build a prioritized list of passive and active candidates for each role and automate outreach, and a WISE assistant that phone-screens candidates and scores their answers.
§ The record
Mercer | Mettl is filed under Assessment AI, Paycor 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 | Paycor |
|---|---|---|
| Price tier | Mid | Mid |
| Headquarters | IN | US |
| Founded | 2010 | 1990 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 53% of the movement so far
Bias Audit Transparency
Mercer | Mettl 42 · Paycor 25
3.1 weighted points to Mercer | Mettl
12% weight · 73% of the movement so far
Human Oversight Design
Mercer | Mettl 45 · Paycor 55
1.2 weighted points to Paycor
15% weight · 86% of the movement so far
Data Governance Disclosure
Mercer | Mettl 55 · Paycor 50
0.8 weighted points to Mercer | Mettl
20% weight · 93% of the movement so far
Article 11 Technical Documentation
Mercer | Mettl 38 · Paycor 40
0.4 weighted points to Paycor
8% weight · 97% of the movement so far
Customer Documentation
Mercer | Mettl 52 · Paycor 55
0.2 weighted points to Paycor
15% weight · 100% of the movement so far
FRIA Support
Mercer | Mettl 28 · Paycor 27
0.1 weighted points to Mercer | Mettl
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 5.8 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 Paycor.
| Category | Weight | Mercer | Mettl | Paycor | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 38 | 40 | -2 | -0.4 |
| Bias Audit Transparency | 18% | 42 | 25 | +17 | +3.1 |
| FRIA Support | 15% | 28 | 27 | +1 | +0.1 |
| Data Governance Disclosure | 15% | 55 | 50 | +5 | +0.8 |
| Human Oversight Design | 12% | 45 | 55 | -10 | -1.2 |
| Post-Market Monitoring | 12% | 38 | 38 | - | - |
| Customer Documentation | 8% | 52 | 55 | -3 | -0.2 |
| Total | 100% | 42 (F) | 40 (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 | Paycor | ||||
|---|---|---|---|---|---|---|---|
| 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 domainSources on a separate domain |
| Bias Audit Transparency | 18% | 0 | 1 | — | 3 | 1 | — |
| 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 | 4 | 1 | Audit reportSources on the vendor's own domainSources on a separate domain |
| Human Oversight Design | 12% | 2 | 0 | Sources on the vendor's own domain | 6 | 0 | Sources on the vendor's own domainSources on a separate domain |
| Post-Market Monitoring | 12% | 1 | 1 | Sources on the vendor's own domain | 3 | 1 | Sources on the vendor's own domainSources on a separate 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 | 24 | 6 | Audit reportSources 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; Paycor has 30 evidence rows across 7 of 7 criteria — 24 with a source URL, 6 documented absences; some documentation or audit rows for Paycor sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 44 evidence rows on file for these two vendors: 14 for Mercer | Mettl, across 2 distinct source domains, and 30 for Paycor, across 6 distinct source domains.
- Rubric
- v1.0
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
- Paycor 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