§ The result
Plum leads Moonhub on all 7 criteria.
Plum finishes 24 points clear of Moonhub under rubric v1.0 — 54 against 30 — across the Assessment and Sourcing cohorts. Plum leads every one of the 7 criteria and 3 of them by 20 raw points or more, Bias Audit Transparency among them; Moonhub leads none. Bias Audit Transparency is both the widest raw gap and the heaviest weighted swing — Moonhub 18, Plum 83 — and at an 18% weight it carries 49% of the weighted advantage Plum holds across the 7 criteria on that side of the table.
Vendor profile
Moonhub
Moonhub is an AI recruiting platform whose agents (Qualify AI, Engage AI, Monitor AI) search, score, outreach to, and engage candidates across more than a billion public and proprietary profiles, working alongside human expert recruiters who vet candidates before presenting them.
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
Moonhub is filed under Candidate sourcing AI, Plum 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 Plum is in scope of Mobley v. Workday.
| Record | Moonhub | Plum |
|---|---|---|
| Price tier | Mid | Mid |
| Headquarters | US | CA |
| Founded | 2022 | 2012 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 49% of the movement so far
Bias Audit Transparency
Moonhub 18 · Plum 83
11.7 weighted points to Plum
20% weight · 72% of the movement so far
Article 11 Technical Documentation
Moonhub 30 · Plum 58
5.6 weighted points to Plum
15% weight · 81% of the movement so far
Data Governance Disclosure
Moonhub 40 · Plum 54
2.1 weighted points to Plum
8% weight · 89% of the movement so far
Customer Documentation
Moonhub 38 · Plum 63
2.0 weighted points to Plum
12% weight · 96% of the movement so far
Post-Market Monitoring
Moonhub 22 · Plum 36
1.7 weighted points to Plum
12% weight · 98% of the movement so far
Human Oversight Design
Moonhub 48 · Plum 52
0.5 weighted points to Plum
15% weight · 100% of the movement so far
FRIA Support
Moonhub 25 · Plum 28
0.4 weighted points to Plum
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to -24.0 — the difference between the two totals before either is rounded. Shares are of 24.0 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads -24 beside that -24.0.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Moonhub minus Plum.
| Category | Weight | Moonhub | Plum | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 30 | 58 | -28 | -5.6 |
| Bias Audit Transparency | 18% | 18 | 83 | -65 | -11.7 |
| FRIA Support | 15% | 25 | 28 | -3 | -0.4 |
| Data Governance Disclosure | 15% | 40 | 54 | -14 | -2.1 |
| Human Oversight Design | 12% | 48 | 52 | -4 | -0.5 |
| Post-Market Monitoring | 12% | 22 | 36 | -14 | -1.7 |
| Customer Documentation | 8% | 38 | 63 | -25 | -2.0 |
| Total | 100% | 30 (F) | 54 (F) | -24 | -24.0 |
§ 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 | Moonhub | Plum | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 1 | 1 | Sources on the vendor's own domain | 3 | 0 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 1 | 1 | — | 3 | 0 | Audit reportSources on the vendor's own domain |
| FRIA Support | 15% | 0 | 1 | — | 0 | 1 | — |
| Data Governance Disclosure | 15% | 1 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 1 | 1 | — | 2 | 1 | Audit reportSources on the vendor's own domain |
| Post-Market Monitoring | 12% | 1 | 1 | — | 2 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 1 | 1 | Sources on the vendor's own domain | 3 | 0 | Sources on the vendor's own domain |
| All criteria | 100% | 6 | 7 | Sources on the vendor's own domain | 15 | 4 | Audit reportSources on the vendor's own domain |
Moonhub has 13 evidence rows across 7 of 7 criteria — 6 with a source URL, 7 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 32 evidence rows on file for these two vendors: 13 for Moonhub, across 3 distinct source domains, and 19 for Plum, across 1 distinct source domain.
- Rubric
- v1.0
- Moonhub last reviewed
- June 7, 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