§ The result
Mercer | Mettl leads micro1 by 6 points.
Under rubric v1.0, Mercer | Mettl, filed under Assessment, finishes on 42 and micro1, filed under Screening, on 36, 6 points apart. micro1 takes 2 of the 7 criteria, Article 11 Technical Documentation among them, against 5 for Mercer | Mettl, whose share includes Bias Audit Transparency. Bias Audit Transparency is both the widest raw gap and the heaviest weighted swing — Mercer | Mettl 42, micro1 20 — and at an 18% weight it carries 47% of the weighted advantage Mercer | Mettl holds across the 5 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
micro1
Zara, micro1's LLM-based AI interviewer, runs recorded, adaptive spoken interviews (with optional coding exercises and automated proctoring) and returns per-skill proficiency ratings, soft-skill ratings and a proctoring score; micro1 uses it to certify experts for its own AI-training talent network, and employers can use it through a client portal and API.
§ The record
Mercer | Mettl is filed under Assessment AI, micro1 under Screening AI. They also share 1 secondary category: Video interview.
Both are in scope of NYC LL 144, Illinois HB 3773, EU AI Act, Colorado AI Act and Mobley v. Workday.
| Record | Mercer | Mettl | micro1 |
|---|---|---|
| Price tier | Mid | Mid |
| Headquarters | IN | US |
| Founded | 2010 | 2022 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 35% of the movement so far
Bias Audit Transparency
Mercer | Mettl 42 · micro1 20
4.0 weighted points to Mercer | Mettl
20% weight · 57% of the movement so far
Article 11 Technical Documentation
Mercer | Mettl 38 · micro1 50
2.4 weighted points to micro1
12% weight · 70% of the movement so far
Post-Market Monitoring
Mercer | Mettl 38 · micro1 25
1.6 weighted points to Mercer | Mettl
15% weight · 84% of the movement so far
Data Governance Disclosure
Mercer | Mettl 55 · micro1 45
1.5 weighted points to Mercer | Mettl
15% weight · 92% of the movement so far
FRIA Support
Mercer | Mettl 28 · micro1 22
0.9 weighted points to Mercer | Mettl
8% weight · 97% of the movement so far
Customer Documentation
Mercer | Mettl 52 · micro1 45
0.6 weighted points to Mercer | Mettl
12% weight · 100% of the movement so far
Human Oversight Design
Mercer | Mettl 45 · micro1 48
0.4 weighted points to micro1
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +5.7 — the difference between the two totals before either is rounded. Shares are of 11.2 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +6 beside that +5.7.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Mercer | Mettl minus micro1.
| Category | Weight | Mercer | Mettl | micro1 | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 38 | 50 | -12 | -2.4 |
| Bias Audit Transparency | 18% | 42 | 20 | +22 | +4.0 |
| FRIA Support | 15% | 28 | 22 | +6 | +0.9 |
| Data Governance Disclosure | 15% | 55 | 45 | +10 | +1.5 |
| Human Oversight Design | 12% | 45 | 48 | -3 | -0.4 |
| Post-Market Monitoring | 12% | 38 | 25 | +13 | +1.6 |
| Customer Documentation | 8% | 52 | 45 | +7 | +0.6 |
| Total | 100% | 42 (F) | 36 (F) | +6 | +5.7 |
§ 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 | micro1 | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Sources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domainSources on a separate domain |
| Bias Audit Transparency | 18% | 0 | 1 | — | 4 | 1 | Sources on the vendor's own domainSources on a separate domain |
| FRIA Support | 15% | 1 | 1 | — | 1 | 2 | Sources on the vendor's own domain |
| Data Governance Disclosure | 15% | 2 | 0 | Sources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 2 | 0 | Sources on the vendor's own domain | 7 | 0 | Sources on the vendor's own domainSources on a separate domain |
| Post-Market Monitoring | 12% | 1 | 1 | Sources on the vendor's own domain | 2 | 2 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 1 | 1 | Sources on the vendor's own domain | 3 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 9 | 5 | Sources on the vendor's own domain | 25 | 8 | 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; micro1 has 33 evidence rows across 7 of 7 criteria — 25 with a source URL, 8 documented absences; some documentation or audit rows for micro1 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 micro1, across 3 distinct source domains.
- Rubric
- v1.0
- Mercer | Mettl last reviewed
- June 7, 2026 · HireAIScore editorial team
- micro1 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