§ The result
ADP leads Aon Assessment on all 7 criteria.
ADP sits 13 points above Aon Assessment under rubric v1.0 — 48 against 35 — with ADP filed under ATS-integrated and Aon Assessment under Assessment. ADP leads every one of the 7 criteria, Aon Assessment none of them, and the closest of the 7 is FRIA Support, ADP 28 to Aon Assessment 25. The widest raw gap and the heaviest weighted swing fall on different criteria: Post-Market Monitoring (ADP 45, Aon Assessment 25) and Bias Audit Transparency at 18% (ADP 46, Aon Assessment 30), the second being 22% of the weighted advantage ADP holds across the 7 criteria on that side of the table.
Vendor profile
ADP
ADP is an enterprise human capital management and payroll provider whose recruiting suite uses AI to parse, rank, and match job applicants via its Candidate Relevancy tool, ADP Assist generative-AI assistant/job-description generator, and skills intelligence.
Vendor profile
Aon Assessment
Aon Assessment Solutions (formerly cut-e) provides enterprise pre-hire psychometric assessments - ability, personality (ADEPT-15), situational-judgement, gamified cognitive (smartPredict/gridChallenge) tests and an AI-scored video interview tool (vidAssess-AI) - used to screen and rank job applicants at scale.
§ The record
ADP is filed under ATS-integrated AI, Aon Assessment 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 Aon Assessment is in scope of Mobley v. Workday.
| Record | ADP | Aon Assessment |
|---|---|---|
| Price tier | Enterprise | Enterprise |
| Headquarters | US | DE |
| Founded | 1949 | 2002 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 22% of the movement so far
Bias Audit Transparency
ADP 46 · Aon Assessment 30
2.9 weighted points to ADP
15% weight · 43% of the movement so far
Data Governance Disclosure
ADP 57 · Aon Assessment 38
2.9 weighted points to ADP
20% weight · 63% of the movement so far
Article 11 Technical Documentation
ADP 53 · Aon Assessment 40
2.6 weighted points to ADP
12% weight · 81% of the movement so far
Post-Market Monitoring
ADP 45 · Aon Assessment 25
2.4 weighted points to ADP
12% weight · 91% of the movement so far
Human Oversight Design
ADP 55 · Aon Assessment 45
1.2 weighted points to ADP
8% weight · 97% of the movement so far
Customer Documentation
ADP 58 · Aon Assessment 48
0.8 weighted points to ADP
15% weight · 100% of the movement so far
FRIA Support
ADP 28 · Aon Assessment 25
0.4 weighted points to ADP
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +13.2 — the difference between the two totals before either is rounded. Shares are of 13.2 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +13 beside that +13.2.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is ADP minus Aon Assessment.
| Category | Weight | ADP | Aon Assessment | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 53 | 40 | +13 | +2.6 |
| Bias Audit Transparency | 18% | 46 | 30 | +16 | +2.9 |
| FRIA Support | 15% | 28 | 25 | +3 | +0.4 |
| Data Governance Disclosure | 15% | 57 | 38 | +19 | +2.9 |
| Human Oversight Design | 12% | 55 | 45 | +10 | +1.2 |
| Post-Market Monitoring | 12% | 45 | 25 | +20 | +2.4 |
| Customer Documentation | 8% | 58 | 48 | +10 | +0.8 |
| Total | 100% | 48 (F) | 35 (F) | +13 | +13.2 |
§ 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 | ADP | Aon Assessment | ||||
|---|---|---|---|---|---|---|---|
| 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% | 2 | 1 | Sources on the vendor's own domain | 1 | 1 | Audit reportSources on a separate domain |
| FRIA Support | 15% | 1 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| Data Governance Disclosure | 15% | 4 | 0 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 3 | 0 | 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 | — |
| Customer Documentation | 8% | 3 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 18 | 5 | Sources on the vendor's own domain | 11 | 6 | Audit reportSources on the vendor's own domainSources on a separate domain |
ADP has 23 evidence rows across 7 of 7 criteria — 18 with a source URL, 5 documented absences; Aon Assessment has 17 evidence rows across 7 of 7 criteria — 11 with a source URL, 6 documented absences; some documentation or audit rows for Aon Assessment sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 40 evidence rows on file for these two vendors: 23 for ADP, across 2 distinct source domains, and 17 for Aon Assessment, across 3 distinct source domains.
- Rubric
- v1.0
- ADP last reviewed
- July 17, 2026 · HireAIScore editorial team
- Aon Assessment 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