§ The result
1 point separates Gem and Plum.
Gem (Sourcing) edges Plum (Assessment) by 1 point under rubric v1.0, 55 to 54. Gem leads 4 of the 7 criteria, including Post-Market Monitoring, while Plum leads 2, including Bias Audit Transparency, and 1 is level. Bias Audit Transparency is at once the widest raw gap and the heaviest weighted swing, and it belongs to Plum — Gem 66, Plum 83, on an 18% weight — which is 97% of the weighted advantage Plum holds across the 2 criteria on that side of the table.
Vendor profile
Gem
Gem is an AI-first recruiting platform combining a talent CRM, AI sourcing and outreach automation, candidate engagement, and a newer applicant tracking system with AI-powered application review and ranking.
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
Gem 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, NYC LL 144, Colorado AI Act and Illinois HB 3773. Only Plum is in scope of Mobley v. Workday.
| Record | Gem | Plum |
|---|---|---|
| Price tier | High | Mid |
| Headquarters | US | CA |
| Founded | 2017 | 2012 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 43% of the movement so far
Bias Audit Transparency
Gem 66 · Plum 83
3.1 weighted points to Plum
12% weight · 62% of the movement so far
Post-Market Monitoring
Gem 47 · Plum 36
1.3 weighted points to Gem
12% weight · 78% of the movement so far
Human Oversight Design
Gem 61 · Plum 52
1.1 weighted points to Gem
15% weight · 92% of the movement so far
FRIA Support
Gem 35 · Plum 28
1.1 weighted points to Gem
15% weight · 99% of the movement so far
Data Governance Disclosure
Gem 57 · Plum 54
0.4 weighted points to Gem
8% weight · 100% of the movement so far
Customer Documentation
Gem 62 · Plum 63
0.1 weighted points to Plum
Weighted delta is the raw difference times the criterion weight, so the 6 figures above sum to +0.8 — the difference between the two totals before either is rounded. Shares are of 7.0 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +1 beside that +0.8.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Gem minus Plum.
| Category | Weight | Gem | Plum | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 58 | 58 | - | - |
| Bias Audit Transparency | 18% | 66 | 83 | -17 | -3.1 |
| FRIA Support | 15% | 35 | 28 | +7 | +1.1 |
| Data Governance Disclosure | 15% | 57 | 54 | +3 | +0.4 |
| Human Oversight Design | 12% | 61 | 52 | +9 | +1.1 |
| Post-Market Monitoring | 12% | 47 | 36 | +11 | +1.3 |
| Customer Documentation | 8% | 62 | 63 | -1 | -0.1 |
| Total | 100% | 55 (F) | 54 (F) | +1 | +0.8 |
§ 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 | Gem | Plum | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Audit reportSources on the vendor's own domainSources on a separate domain | 3 | 0 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 3 | 0 | Audit reportSources on the vendor's own domainSources on a separate domain | 3 | 0 | Audit reportSources on the vendor's own domain |
| FRIA Support | 15% | 2 | 1 | Sources on the vendor's own domain | 0 | 1 | — |
| Data Governance Disclosure | 15% | 3 | 0 | Audit reportSources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 3 | 0 | Audit reportSources on the vendor's own domainSources on a separate domain | 2 | 1 | Audit reportSources on the vendor's own domain |
| Post-Market Monitoring | 12% | 3 | 0 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 3 | 0 | Sources on the vendor's own domain | 3 | 0 | Sources on the vendor's own domain |
| All criteria | 100% | 19 | 2 | Audit reportSources on the vendor's own domainSources on a separate domain | 15 | 4 | Audit reportSources on the vendor's own domain |
Gem has 21 evidence rows across 7 of 7 criteria — 19 with a source URL, 2 documented absences; Plum has 19 evidence rows across 7 of 7 criteria — 15 with a source URL, 4 documented absences; some documentation or audit rows for Gem 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: 21 for Gem, across 2 distinct source domains, and 19 for Plum, across 1 distinct source domain.
- Rubric
- v1.0
- Gem 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