§ The result
Plum leads Workstream by 15 points.
Plum finishes 15 points clear of Workstream under rubric v1.0 — 54 against 39 — across the Assessment and Screening cohorts. Plum leads 6 of the 7 criteria, including Bias Audit Transparency, while Workstream leads 1, including Human Oversight Design. One criterion, Bias Audit Transparency, is both the widest raw gap (Plum 83, Workstream 20) and the heaviest weighted swing, and at 18% weight it makes up 67% of the weighted advantage Plum holds across the 6 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
Workstream
Workstream is a mobile-first HR, payroll and hiring platform for hourly, multi-location employers such as QSR franchisees. Its hiring suite pairs a text-to-apply applicant tracking system with VoiceAI phone screens and VideoAI asynchronous video interviews, which return transcripts, AI summaries, pass/fail results for each question and match scores.
§ The record
Plum is filed under Assessment AI, Workstream 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 | Workstream |
|---|---|---|
| Price tier | Mid | Mid |
| Headquarters | CA | US |
| Founded | 2012 | 2017 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 63% of the movement so far
Bias Audit Transparency
Plum 83 · Workstream 20
11.3 weighted points to Plum
20% weight · 83% of the movement so far
Article 11 Technical Documentation
Plum 58 · Workstream 40
3.6 weighted points to Plum
12% weight · 89% of the movement so far
Human Oversight Design
Plum 52 · Workstream 61
1.1 weighted points to Workstream
15% weight · 95% of the movement so far
Data Governance Disclosure
Plum 54 · Workstream 47
1.1 weighted points to Plum
8% weight · 98% of the movement so far
Customer Documentation
Plum 63 · Workstream 56
0.6 weighted points to Plum
15% weight · 99% of the movement so far
FRIA Support
Plum 28 · Workstream 27
0.1 weighted points to Plum
12% weight · 100% of the movement so far
Post-Market Monitoring
Plum 36 · Workstream 35
0.1 weighted points to Plum
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +15.7 — the difference between the two totals before either is rounded. Shares are of 17.9 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +15 beside that +15.7.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Plum minus Workstream.
| Category | Weight | Plum | Workstream | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 58 | 40 | +18 | +3.6 |
| Bias Audit Transparency | 18% | 83 | 20 | +63 | +11.3 |
| FRIA Support | 15% | 28 | 27 | +1 | +0.1 |
| Data Governance Disclosure | 15% | 54 | 47 | +7 | +1.1 |
| Human Oversight Design | 12% | 52 | 61 | -9 | -1.1 |
| Post-Market Monitoring | 12% | 36 | 35 | +1 | +0.1 |
| Customer Documentation | 8% | 63 | 56 | +7 | +0.6 |
| Total | 100% | 54 (F) | 39 (F) | +15 | +15.7 |
§ 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 | Workstream | ||||
|---|---|---|---|---|---|---|---|
| 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 | 5 | 1 | Sources on the vendor's own domain |
| FRIA Support | 15% | 0 | 1 | — | 2 | 1 | Sources on the vendor's own domain |
| Data Governance Disclosure | 15% | 2 | 1 | Sources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 2 | 1 | Audit reportSources on the vendor's own domain | 7 | 0 | Sources on the vendor's own domain |
| Post-Market Monitoring | 12% | 2 | 1 | Sources on the vendor's own domain | 3 | 1 | Sources on the vendor's own domainSources on a separate domain |
| Customer Documentation | 8% | 3 | 0 | Sources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 15 | 4 | Audit reportSources on the vendor's own domain | 28 | 6 | 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; Workstream has 34 evidence rows across 7 of 7 criteria — 28 with a source URL, 6 documented absences; some documentation or audit rows for Workstream sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 53 evidence rows on file for these two vendors: 19 for Plum, across 1 distinct source domain, and 34 for Workstream, across 2 distinct source domains.
- Rubric
- v1.0
- Plum last reviewed
- June 7, 2026 · HireAIScore editorial team
- Workstream 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