§ The result
Mercer | Mettl leads HeroHunt.ai by 12 points.
Mercer | Mettl sits 12 points above HeroHunt.ai under rubric v1.0 — 42 against 30 — with Mercer | Mettl filed under Assessment and HeroHunt.ai under Sourcing. The 7 criteria split 6 to 1 in favour of Mercer | Mettl: Mercer | Mettl is ahead on Bias Audit Transparency and HeroHunt.ai on Human Oversight Design. One criterion, Bias Audit Transparency, is both the widest raw gap (HeroHunt.ai 10, Mercer | Mettl 42) and the heaviest weighted swing, and at 18% weight it makes up 46% of the weighted advantage Mercer | Mettl holds across the 6 criteria it leads.
Vendor profile
HeroHunt.ai
HeroHunt.ai's AI Recruiter (launched as Uwi) searches a claimed 1 billion+ professional profiles, scores and ranks them against a job description with language models, and sends AI-personalised outreach to the candidates a user approves.
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
HeroHunt.ai is filed under Candidate sourcing AI, Mercer | Mettl under Assessment AI. They also share 1 secondary category: Screening.
Both are in scope of EU AI Act, Colorado AI Act, NYC LL 144 and Illinois HB 3773. Only Mercer | Mettl is in scope of Mobley v. Workday.
| Record | HeroHunt.ai | Mercer | Mettl |
|---|---|---|
| Price tier | Low | Mid |
| Headquarters | NL | IN |
| Founded | 2021 | 2010 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 42% of the movement so far
Bias Audit Transparency
HeroHunt.ai 10 · Mercer | Mettl 42
5.8 weighted points to Mercer | Mettl
20% weight · 68% of the movement so far
Article 11 Technical Documentation
HeroHunt.ai 20 · Mercer | Mettl 38
3.6 weighted points to Mercer | Mettl
15% weight · 79% of the movement so far
Data Governance Disclosure
HeroHunt.ai 45 · Mercer | Mettl 55
1.5 weighted points to Mercer | Mettl
12% weight · 88% of the movement so far
Human Oversight Design
HeroHunt.ai 55 · Mercer | Mettl 45
1.2 weighted points to HeroHunt.ai
12% weight · 97% of the movement so far
Post-Market Monitoring
HeroHunt.ai 28 · Mercer | Mettl 38
1.2 weighted points to Mercer | Mettl
8% weight · 99% of the movement so far
Customer Documentation
HeroHunt.ai 48 · Mercer | Mettl 52
0.3 weighted points to Mercer | Mettl
15% weight · 100% of the movement so far
FRIA Support
HeroHunt.ai 27 · Mercer | Mettl 28
0.1 weighted points to Mercer | Mettl
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to -11.3 — the difference between the two totals before either is rounded. Shares are of 13.7 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 -11.3.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is HeroHunt.ai minus Mercer | Mettl.
| Category | Weight | HeroHunt.ai | Mercer | Mettl | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 20 | 38 | -18 | -3.6 |
| Bias Audit Transparency | 18% | 10 | 42 | -32 | -5.8 |
| FRIA Support | 15% | 27 | 28 | -1 | -0.1 |
| Data Governance Disclosure | 15% | 45 | 55 | -10 | -1.5 |
| Human Oversight Design | 12% | 55 | 45 | +10 | +1.2 |
| Post-Market Monitoring | 12% | 28 | 38 | -10 | -1.2 |
| Customer Documentation | 8% | 48 | 52 | -4 | -0.3 |
| Total | 100% | 30 (F) | 42 (F) | -12 | -11.3 |
§ 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 | HeroHunt.ai | Mercer | Mettl | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 3 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 2 | 1 | — | 0 | 1 | — |
| FRIA Support | 15% | 2 | 1 | Sources on the vendor's own domain | 1 | 1 | — |
| Data Governance Disclosure | 15% | 5 | 1 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 5 | 1 | Sources on the vendor's own domainSources on a separate domain | 2 | 0 | Sources on the vendor's own domain |
| Post-Market Monitoring | 12% | 2 | 2 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 6 | 0 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 25 | 7 | Sources on the vendor's own domainSources on a separate domain | 9 | 5 | Sources on the vendor's own domain |
HeroHunt.ai has 32 evidence rows across 7 of 7 criteria — 25 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; some documentation or audit rows for HeroHunt.ai sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 46 evidence rows on file for these two vendors: 32 for HeroHunt.ai, across 2 distinct source domains, and 14 for Mercer | Mettl, across 2 distinct source domains.
- Rubric
- v1.0
- HeroHunt.ai 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