§ The result
Plum leads ADP by 6 points.
Plum scores 54 and ADP 48 under rubric v1.0, a 6-point gap across the Assessment and ATS-integrated cohorts. ADP and Plum each lead 3 of the 7 criteria, with 1 level, though the side of the split Plum holds (headed by Bias Audit Transparency) adds up to more weighted points. Bias Audit Transparency is both the widest raw gap and the heaviest weighted swing — ADP 46, Plum 83 — and at an 18% weight it carries 83% of the weighted advantage Plum holds across the 3 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
Plum
Plum is a pre-employment talent assessment platform that uses a Five-Factor (Big Five) psychometric Discovery Survey and a Talent Match model to score and rank candidates on behavioral "durable skills" for role fit, hiring, and development.
§ The record
ADP is filed under ATS-integrated AI, Plum 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 Plum is in scope of Mobley v. Workday.
| Record | ADP | Plum |
|---|---|---|
| Price tier | Enterprise | Mid |
| Headquarters | US | CA |
| Founded | 1949 | 2012 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 67% of the movement so far
Bias Audit Transparency
ADP 46 · Plum 83
6.7 weighted points to Plum
12% weight · 78% of the movement so far
Post-Market Monitoring
ADP 45 · Plum 36
1.1 weighted points to ADP
20% weight · 88% of the movement so far
Article 11 Technical Documentation
ADP 53 · Plum 58
1.0 weighted points to Plum
15% weight · 92% of the movement so far
Data Governance Disclosure
ADP 57 · Plum 54
0.4 weighted points to ADP
8% weight · 96% of the movement so far
Customer Documentation
ADP 58 · Plum 63
0.4 weighted points to Plum
12% weight · 100% of the movement so far
Human Oversight Design
ADP 55 · Plum 52
0.4 weighted points to ADP
Weighted delta is the raw difference times the criterion weight, so the 6 figures above sum to -6.2 — the difference between the two totals before either is rounded. Shares are of 9.9 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 -6.2.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is ADP minus Plum.
| Category | Weight | ADP | Plum | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 53 | 58 | -5 | -1.0 |
| Bias Audit Transparency | 18% | 46 | 83 | -37 | -6.7 |
| FRIA Support | 15% | 28 | 28 | - | - |
| Data Governance Disclosure | 15% | 57 | 54 | +3 | +0.4 |
| Human Oversight Design | 12% | 55 | 52 | +3 | +0.4 |
| Post-Market Monitoring | 12% | 45 | 36 | +9 | +1.1 |
| Customer Documentation | 8% | 58 | 63 | -5 | -0.4 |
| Total | 100% | 48 (F) | 54 (F) | -6 | -6.2 |
§ 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 | Plum | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Sources on the vendor's own domain | 3 | 0 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 2 | 1 | Sources on the vendor's own domain | 3 | 0 | Audit reportSources on the vendor's own domain |
| FRIA Support | 15% | 1 | 1 | Sources on the vendor's own domain | 0 | 1 | — |
| 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 | 1 | Audit reportSources on the vendor's own domain |
| Post-Market Monitoring | 12% | 3 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 3 | 1 | Sources on the vendor's own domain | 3 | 0 | Sources on the vendor's own domain |
| All criteria | 100% | 18 | 5 | Sources on the vendor's own domain | 15 | 4 | Audit reportSources on the vendor's own domain |
ADP has 23 evidence rows across 7 of 7 criteria — 18 with a source URL, 5 documented absences; Plum has 19 evidence rows across 7 of 7 criteria — 15 with a source URL, 4 documented absences.
Provenance
The scores above are documented by 42 evidence rows on file for these two vendors: 23 for ADP, across 2 distinct source domains, and 19 for Plum, across 1 distinct source domain.
- Rubric
- v1.0
- ADP last reviewed
- July 17, 2026 · HireAIScore editorial team
- Plum 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