§ The result
Plum leads Ribbon by 11 points.
Plum sits 11 points above Ribbon under rubric v1.0 — 54 against 43 — with Plum filed under Assessment and Ribbon under Screening. Plum leads 4 of the 7 criteria, including Bias Audit Transparency, while Ribbon leads 3, including FRIA Support. One criterion, Bias Audit Transparency, is both the widest raw gap (Plum 83, Ribbon 38) and the heaviest weighted swing, and at 18% weight it makes up 66% of the weighted advantage Plum holds across the 4 criteria it leads.
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.
Vendor profile
Ribbon
Ribbon is an AI recruiter that runs voice and video screening interviews with applicants around the clock, scores each interview against default and custom rubrics, ranks candidates for recruiter review, and syncs the results to 60+ applicant tracking systems.
§ The record
Plum is filed under Assessment AI, Ribbon under Screening AI. They record no secondary category in common.
Both are in scope of NYC LL 144, Illinois HB 3773, EU AI Act, Colorado AI Act and Mobley v. Workday.
| Record | Plum | Ribbon |
|---|---|---|
| Price tier | Mid | Low |
| Headquarters | CA | CA |
| Founded | 2012 | 2020 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 60% of the movement so far
Bias Audit Transparency
Plum 83 · Ribbon 38
8.1 weighted points to Plum
20% weight · 84% of the movement so far
Article 11 Technical Documentation
Plum 58 · Ribbon 42
3.2 weighted points to Plum
15% weight · 89% of the movement so far
FRIA Support
Plum 28 · Ribbon 33
0.8 weighted points to Ribbon
15% weight · 93% of the movement so far
Data Governance Disclosure
Plum 54 · Ribbon 50
0.6 weighted points to Plum
8% weight · 96% of the movement so far
Customer Documentation
Plum 63 · Ribbon 58
0.4 weighted points to Plum
12% weight · 99% of the movement so far
Human Oversight Design
Plum 52 · Ribbon 55
0.4 weighted points to Ribbon
12% weight · 100% of the movement so far
Post-Market Monitoring
Plum 36 · Ribbon 37
0.1 weighted points to Ribbon
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +11.1 — the difference between the two totals before either is rounded. Shares are of 13.5 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +11 beside that +11.1.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Plum minus Ribbon.
| Category | Weight | Plum | Ribbon | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 58 | 42 | +16 | +3.2 |
| Bias Audit Transparency | 18% | 83 | 38 | +45 | +8.1 |
| FRIA Support | 15% | 28 | 33 | -5 | -0.8 |
| Data Governance Disclosure | 15% | 54 | 50 | +4 | +0.6 |
| Human Oversight Design | 12% | 52 | 55 | -3 | -0.4 |
| Post-Market Monitoring | 12% | 36 | 37 | -1 | -0.1 |
| Customer Documentation | 8% | 63 | 58 | +5 | +0.4 |
| Total | 100% | 54 (F) | 43 (F) | +11 | +11.1 |
§ 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 | Plum | Ribbon | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 3 | 0 | Sources on the vendor's own domain | 3 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 3 | 0 | Audit reportSources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domain |
| FRIA Support | 15% | 0 | 1 | — | 3 | 1 | Sources on the vendor's own domain |
| Data Governance Disclosure | 15% | 2 | 1 | Sources on the vendor's own domain | 6 | 0 | Sources on the vendor's own domainSources on a separate domain |
| Human Oversight Design | 12% | 2 | 1 | Audit reportSources on the vendor's own domain | 6 | 0 | Sources on the vendor's own domain |
| Post-Market Monitoring | 12% | 2 | 1 | Sources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 3 | 0 | Sources on the vendor's own domain | 5 | 0 | Sources on the vendor's own domain |
| All criteria | 100% | 15 | 4 | Audit reportSources on the vendor's own domain | 31 | 4 | Sources on the vendor's own domainSources on a separate domain |
Plum has 19 evidence rows across 7 of 7 criteria — 15 with a source URL, 4 documented absences; Ribbon has 35 evidence rows across 7 of 7 criteria — 31 with a source URL, 4 documented absences; some documentation or audit rows for Ribbon sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 54 evidence rows on file for these two vendors: 19 for Plum, across 1 distinct source domain, and 35 for Ribbon, across 2 distinct source domains.
- Rubric
- v1.0
- Plum last reviewed
- June 7, 2026 · HireAIScore editorial team
- Ribbon 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