§ The result
Mercer | Mettl takes the total, ZipRecruiter takes more of the criteria.
Mercer | Mettl (Assessment) edges ZipRecruiter (Sourcing) by 2 points under rubric v1.0, 42 to 40. ZipRecruiter leads more of the criteria than Mercer | Mettl — 4 to 3 — but Bias Audit Transparency, which Mercer | Mettl leads, carries 18% of the rubric, and the weighted sum still falls to Mercer | Mettl. One criterion, Bias Audit Transparency, is both the widest raw gap (Mercer | Mettl 42, ZipRecruiter 24) and the heaviest weighted swing, and at 18% weight it makes up 84% 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
ZipRecruiter
ZipRecruiter is an online employment marketplace whose AI matching engine sends employers' job postings out, alerts matched job seekers and invites them to apply, and labels and ranks applicants (for example as 'Great Match') in the employer's candidate dashboard.
§ The record
Mercer | Mettl is filed under Assessment AI, ZipRecruiter under Candidate sourcing 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 | ZipRecruiter |
|---|---|---|
| Price tier | Mid | Mid |
| Headquarters | IN | US |
| Founded | 2010 | 2010 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 55% of the movement so far
Bias Audit Transparency
Mercer | Mettl 42 · ZipRecruiter 24
3.2 weighted points to Mercer | Mettl
12% weight · 76% of the movement so far
Human Oversight Design
Mercer | Mettl 45 · ZipRecruiter 55
1.2 weighted points to ZipRecruiter
15% weight · 84% of the movement so far
Data Governance Disclosure
Mercer | Mettl 55 · ZipRecruiter 52
0.4 weighted points to Mercer | Mettl
20% weight · 91% of the movement so far
Article 11 Technical Documentation
Mercer | Mettl 38 · ZipRecruiter 40
0.4 weighted points to ZipRecruiter
12% weight · 95% of the movement so far
Post-Market Monitoring
Mercer | Mettl 38 · ZipRecruiter 40
0.2 weighted points to ZipRecruiter
8% weight · 97% of the movement so far
Customer Documentation
Mercer | Mettl 52 · ZipRecruiter 54
0.2 weighted points to ZipRecruiter
15% weight · 100% of the movement so far
FRIA Support
Mercer | Mettl 28 · ZipRecruiter 27
0.1 weighted points to Mercer | Mettl
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +1.8 — 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 +1.8.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Mercer | Mettl minus ZipRecruiter.
| Category | Weight | Mercer | Mettl | ZipRecruiter | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 38 | 40 | -2 | -0.4 |
| Bias Audit Transparency | 18% | 42 | 24 | +18 | +3.2 |
| FRIA Support | 15% | 28 | 27 | +1 | +0.1 |
| Data Governance Disclosure | 15% | 55 | 52 | +3 | +0.4 |
| Human Oversight Design | 12% | 45 | 55 | -10 | -1.2 |
| Post-Market Monitoring | 12% | 38 | 40 | -2 | -0.2 |
| Customer Documentation | 8% | 52 | 54 | -2 | -0.2 |
| Total | 100% | 42 (F) | 40 (F) | +2 | +1.8 |
§ 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 | ZipRecruiter | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Sources on the vendor's own domain | 5 | 1 | Sources on the vendor's own domainSources on a separate domain |
| Bias Audit Transparency | 18% | 0 | 1 | — | 3 | 1 | Sources on the vendor's own domainSources on a separate domain |
| FRIA Support | 15% | 1 | 1 | — | 3 | 1 | Sources on the vendor's own domainSources on a separate domain |
| Data Governance Disclosure | 15% | 2 | 0 | Sources on the vendor's own domain | 4 | 0 | Sources 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 domain |
| Post-Market Monitoring | 12% | 1 | 1 | Sources on the vendor's own domain | 3 | 1 | Sources on the vendor's own 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 | 28 | 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; ZipRecruiter has 33 evidence rows across 7 of 7 criteria — 28 with a source URL, 5 documented absences; some documentation or audit rows for ZipRecruiter sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 47 evidence rows on file for these two vendors: 14 for Mercer | Mettl, across 2 distinct source domains, and 33 for ZipRecruiter, across 6 distinct source domains.
- Rubric
- v1.0
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
- ZipRecruiter 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