§ The result
Mercer | Mettl leads XOR on all 7 criteria.
Mercer | Mettl sits 12 points above XOR under rubric v1.0 — 42 against 30 — with Mercer | Mettl filed under Assessment and XOR under Screening. Mercer | Mettl leads every one of the 7 criteria, XOR none of them, and the closest of the 7 is FRIA Support, Mercer | Mettl 28 to XOR 25. Bias Audit Transparency is the widest raw gap and the heaviest weighted swing at once (Mercer | Mettl 42, XOR 18, 18% weight), but it accounts for only 36% of the weighted advantage Mercer | Mettl holds across the 7 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
XOR
XOR is a text-first conversational-AI recruiting platform that pre-screens and scores high-volume and hourly candidates with recruiter-defined knockout/scoring questions over SMS, WhatsApp, and Messenger, then auto-schedules interviews on the recruiter's calendar.
§ The record
Mercer | Mettl is filed under Assessment AI, XOR under Screening AI. They record no secondary category in common.
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 | XOR |
|---|---|---|
| Price tier | Mid | Mid |
| Headquarters | IN | US |
| Founded | 2010 | 2016 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 36% of the movement so far
Bias Audit Transparency
Mercer | Mettl 42 · XOR 18
4.3 weighted points to Mercer | Mettl
20% weight · 67% of the movement so far
Article 11 Technical Documentation
Mercer | Mettl 38 · XOR 20
3.6 weighted points to Mercer | Mettl
15% weight · 83% of the movement so far
Data Governance Disclosure
Mercer | Mettl 55 · XOR 42
1.9 weighted points to Mercer | Mettl
12% weight · 88% of the movement so far
Human Oversight Design
Mercer | Mettl 45 · XOR 40
0.6 weighted points to Mercer | Mettl
12% weight · 93% of the movement so far
Post-Market Monitoring
Mercer | Mettl 38 · XOR 33
0.6 weighted points to Mercer | Mettl
15% weight · 97% of the movement so far
FRIA Support
Mercer | Mettl 28 · XOR 25
0.4 weighted points to Mercer | Mettl
8% weight · 100% of the movement so far
Customer Documentation
Mercer | Mettl 52 · XOR 48
0.3 weighted points to Mercer | Mettl
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +11.8 — the difference between the two totals before either is rounded. Shares are of 11.8 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +12 beside that +11.8.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Mercer | Mettl minus XOR.
| Category | Weight | Mercer | Mettl | XOR | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 38 | 20 | +18 | +3.6 |
| Bias Audit Transparency | 18% | 42 | 18 | +24 | +4.3 |
| FRIA Support | 15% | 28 | 25 | +3 | +0.4 |
| Data Governance Disclosure | 15% | 55 | 42 | +13 | +1.9 |
| Human Oversight Design | 12% | 45 | 40 | +5 | +0.6 |
| Post-Market Monitoring | 12% | 38 | 33 | +5 | +0.6 |
| Customer Documentation | 8% | 52 | 48 | +4 | +0.3 |
| Total | 100% | 42 (F) | 30 (F) | +12 | +11.8 |
§ 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 | XOR | ||||
|---|---|---|---|---|---|---|---|
| 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 | Sources on the vendor's own domain |
| 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 | Sources 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 | 2 | 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 | 11 | 7 | Sources 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; XOR 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 XOR, across 1 distinct source domain.
- Rubric
- v1.0
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
- XOR 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