§ The result
4 points separate HiBob and Mercer | Mettl.
HiBob (ATS-integrated) edges Mercer | Mettl (Assessment) by 4 points under rubric v1.0, 46 to 42. Mercer | Mettl takes 1 of the 7 criteria, Bias Audit Transparency among them, against 6 for HiBob, whose share includes Article 11 Technical Documentation. The widest raw gap and the heaviest weighted swing are the same criterion, Bias Audit Transparency, and Mercer | Mettl holds it (HiBob 20, Mercer | Mettl 42, 18% weight), worth 100% of the weighted advantage Mercer | Mettl builds across the 1 criterion it leads.
Vendor profile
HiBob
HiBob's Bob is an all-in-one HR platform whose Bob Hiring applicant tracking module uses AI to give each application an explainable match score against recruiter-defined criteria (AI CV Matching) and to draft job descriptions, interview scorecards and candidate emails.
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.
§ The record
HiBob is filed under ATS-integrated AI, Mercer | Mettl under Assessment AI. They also share 1 secondary category: Screening.
Both are in scope of EU AI Act, NYC LL 144, Colorado AI Act and Illinois HB 3773. Only Mercer | Mettl is in scope of Mobley v. Workday.
| Record | HiBob | Mercer | Mettl |
|---|---|---|
| Price tier | Mid | Mid |
| Headquarters | GB | IN |
| Founded | 2015 | 2010 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 31% of the movement so far
Bias Audit Transparency
HiBob 20 · Mercer | Mettl 42
4.0 weighted points to Mercer | Mettl
20% weight · 58% of the movement so far
Article 11 Technical Documentation
HiBob 55 · Mercer | Mettl 38
3.4 weighted points to HiBob
12% weight · 75% of the movement so far
Human Oversight Design
HiBob 63 · Mercer | Mettl 45
2.2 weighted points to HiBob
12% weight · 84% of the movement so far
Post-Market Monitoring
HiBob 47 · Mercer | Mettl 38
1.1 weighted points to HiBob
15% weight · 92% of the movement so far
FRIA Support
HiBob 35 · Mercer | Mettl 28
1.1 weighted points to HiBob
8% weight · 98% of the movement so far
Customer Documentation
HiBob 61 · Mercer | Mettl 52
0.7 weighted points to HiBob
15% weight · 100% of the movement so far
Data Governance Disclosure
HiBob 57 · Mercer | Mettl 55
0.3 weighted points to HiBob
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +4.8 — the difference between the two totals before either is rounded. Shares are of 12.7 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +4 beside that +4.8.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is HiBob minus Mercer | Mettl.
| Category | Weight | HiBob | Mercer | Mettl | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 55 | 38 | +17 | +3.4 |
| Bias Audit Transparency | 18% | 20 | 42 | -22 | -4.0 |
| FRIA Support | 15% | 35 | 28 | +7 | +1.1 |
| Data Governance Disclosure | 15% | 57 | 55 | +2 | +0.3 |
| Human Oversight Design | 12% | 63 | 45 | +18 | +2.2 |
| Post-Market Monitoring | 12% | 47 | 38 | +9 | +1.1 |
| Customer Documentation | 8% | 61 | 52 | +9 | +0.7 |
| Total | 100% | 46 (F) | 42 (F) | +4 | +4.8 |
§ 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 | HiBob | Mercer | Mettl | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 5 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 3 | 1 | Sources on the vendor's own domain | 0 | 1 | — |
| FRIA Support | 15% | 3 | 1 | Sources on the vendor's own domain | 1 | 1 | — |
| Data Governance Disclosure | 15% | 4 | 1 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 6 | 1 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Post-Market Monitoring | 12% | 3 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 5 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 29 | 7 | Sources on the vendor's own domain | 9 | 5 | Sources on the vendor's own domain |
HiBob has 36 evidence rows across 7 of 7 criteria — 29 with a source URL, 7 documented absences; Mercer | Mettl has 14 evidence rows across 7 of 7 criteria — 9 with a source URL, 5 documented absences.
Provenance
The scores above are documented by 50 evidence rows on file for these two vendors: 36 for HiBob, across 4 distinct source domains, and 14 for Mercer | Mettl, across 2 distinct source domains.
- Rubric
- v1.0
- HiBob last reviewed
- September 25, 2026 · HireAIScore editorial team
- Mercer | Mettl 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