§ The result
1 point separates Paylocity and Mercer | Mettl.
Paylocity (ATS-integrated) edges Mercer | Mettl (Assessment) by 1 point under rubric v1.0, 43 to 42. Paylocity leads 5 of the 7 criteria, including Article 11 Technical Documentation, while Mercer | Mettl leads 2, including Bias Audit Transparency. Bias Audit Transparency is at once the widest raw gap and the heaviest weighted swing, and it belongs to Mercer | Mettl — Mercer | Mettl 42, Paylocity 33, on an 18% weight — which is 92% of the weighted advantage Mercer | Mettl holds across the 2 criteria 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
Paylocity
Paylocity is a cloud-based HCM and payroll platform whose talent suite includes an applicant tracking system with generative-AI job-description and invite drafting, one-way video interviews, candidate self-scheduling, and a conversational "AI Assistant."
§ The record
Mercer | Mettl is filed under Assessment AI, Paylocity under ATS-integrated 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 | Paylocity |
|---|---|---|
| Price tier | Mid | Mid |
| Headquarters | IN | US |
| Founded | 2010 | 1997 |
§ 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 · Paylocity 33
1.6 weighted points to Mercer | Mettl
20% weight · 58% of the movement so far
Article 11 Technical Documentation
Mercer | Mettl 38 · Paylocity 44
1.2 weighted points to Paylocity
12% weight · 71% of the movement so far
Human Oversight Design
Mercer | Mettl 45 · Paylocity 50
0.6 weighted points to Paylocity
12% weight · 81% of the movement so far
Post-Market Monitoring
Mercer | Mettl 38 · Paylocity 42
0.5 weighted points to Paylocity
8% weight · 91% of the movement so far
Customer Documentation
Mercer | Mettl 52 · Paylocity 58
0.5 weighted points to Paylocity
15% weight · 97% of the movement so far
FRIA Support
Mercer | Mettl 28 · Paylocity 30
0.3 weighted points to Paylocity
15% weight · 100% of the movement so far
Data Governance Disclosure
Mercer | Mettl 55 · Paylocity 54
0.1 weighted points to Mercer | Mettl
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to -1.3 — the difference between the two totals before either is rounded. Shares are of 4.8 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads -1 beside that -1.3.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Mercer | Mettl minus Paylocity.
| Category | Weight | Mercer | Mettl | Paylocity | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 38 | 44 | -6 | -1.2 |
| Bias Audit Transparency | 18% | 42 | 33 | +9 | +1.6 |
| FRIA Support | 15% | 28 | 30 | -2 | -0.3 |
| Data Governance Disclosure | 15% | 55 | 54 | +1 | +0.1 |
| Human Oversight Design | 12% | 45 | 50 | -5 | -0.6 |
| Post-Market Monitoring | 12% | 38 | 42 | -4 | -0.5 |
| Customer Documentation | 8% | 52 | 58 | -6 | -0.5 |
| Total | 100% | 42 (F) | 43 (F) | -1 | -1.3 |
§ 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 | Paylocity | ||||
|---|---|---|---|---|---|---|---|
| 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 | — | 1 | 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 | 2 | 1 | Audit reportSources on the vendor's own domain |
| Human Oversight Design | 12% | 2 | 0 | Sources on the vendor's own domain | 2 | 1 | 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% | 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 | 11 | 7 | 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; Paylocity has 18 evidence rows across 7 of 7 criteria — 11 with a source URL, 7 documented absences.
Provenance
The scores above are documented by 32 evidence rows on file for these two vendors: 14 for Mercer | Mettl, across 2 distinct source domains, and 18 for Paylocity, across 2 distinct source domains.
- Rubric
- v1.0
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
- Paylocity last reviewed
- July 17, 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