Side-by-side · Rubric v1.0
HackerRank vs Plum
HackerRank
HackerRank is a technical skills assessment platform for developer hiring that uses coding tests, interviews, and AI-based features (question generation, ML plagiarism/AI-code detection, and image-analysis proctoring) to evaluate candidates.
Substantial gaps
Assessment
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.
Substantial gaps
Assessment
The result
1 point separates HackerRank and Plum.
Under rubric v1.0, HackerRank and Plum finish 1 point apart, 55 to 54, as two Assessment entries. HackerRank leads 5 of the 7 criteria, including Post-Market Monitoring, while Plum leads 2, including Bias Audit Transparency. Bias Audit Transparency is at once the widest raw gap and the heaviest weighted swing, and it belongs to Plum — HackerRank 68, 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.
Criteria won
7 criteria
- HackerRank5
- Plum2
- Widest raw gap
- Bias Audit Transparency68 vs 83
- Heaviest weighted swing
- Bias Audit Transparency18% weight
Keep this comparison
Both scores and all 7 criteria, side by side, in your inbox.
The record
Categories, scope and company facts.
HackerRank and Plum are both filed under Assessment AI. They also share 1 secondary category: Screening.
Both are in scope of
| Record | HackerRank | Plum |
|---|---|---|
| Price tier | Enterprise | Mid |
| Headquarters | US | CA |
| Founded | 2009 | 2012 |
What decides it
The criteria that move the gap, heaviest swing first.
- 1
Bias Audit Transparency
18% weight42% of the movement so far
HackerRank68Plum832.7 weighted points to Plum
- 2
Post-Market Monitoring
12% weight59% of the movement so far
HackerRank45Plum361.1 weighted points to HackerRank
- 3
FRIA Support
15% weight75% of the movement so far
HackerRank35Plum281.1 weighted points to HackerRank
- 4
Human Oversight Design
12% weight90% of the movement so far
HackerRank60Plum521.0 weighted points to HackerRank
- 5
Article 11 Technical Documentation
20% weight96% of the movement so far
HackerRank60Plum580.4 weighted points to HackerRank
- 6
Data Governance Disclosure
15% weight99% of the movement so far
HackerRank55Plum540.1 weighted points to HackerRank
- 7
Customer Documentation
8% weight100% of the movement so far
HackerRank62Plum630.1 weighted points to Plum
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +0.9 — the difference between the two totals before either is rounded. Shares are of 6.4 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 +0.9.
Category-by-category
Raw score per criterion, with weighted delta.
Δ is HackerRank minus Plum, coloured for whichever of the two it favours.
| Category | Weight | HackerRank | Plum | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 60 | 58 | +2 | +0.4 |
| Bias Audit Transparency | 18% | 68 | 83 | -15 | -2.7 |
| FRIA Support | 15% | 35 | 28 | +7 | +1.1 |
| Data Governance Disclosure | 15% | 55 | 54 | +1 | +0.1 |
| Human Oversight Design | 12% | 60 | 52 | +8 | +1.0 |
| Post-Market Monitoring | 12% | 45 | 36 | +9 | +1.1 |
| Customer Documentation | 8% | 62 | 63 | -1 | -0.1 |
| Total | 100% | 55F | 54F | +1 | +0.9 |
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 | HackerRank | 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% | 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% | 1 | 1 | Sources on the vendor's own domain | 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% | 2 | 0 | Sources on the vendor's own domain | 2 | 1 | Audit reportSources on the vendor's own domain |
| Post-Market Monitoring | 12% | 3 | 0 | Sources on the vendor's own domainSources on a separate domain | 2 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 2 | 1 | Sources on the vendor's own domain | 3 | 0 | Sources on the vendor's own domain |
| All criteria | 100% | 14 | 4 | Audit reportSources on the vendor's own domainSources on a separate domain | 15 | 4 | Audit reportSources on the vendor's own domain |
HackerRank has 18 evidence rows across 7 of 7 criteria — 14 with a source URL, 4 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 HackerRank sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 37 evidence rows on file for these two vendors: 18 for HackerRank, across 3 distinct source domains, and 19 for Plum, across 1 distinct source domain.
- Rubric
- v1.0
- HackerRank last reviewed
- June 7, 2026 · HireAIScore editorial team
- Plum last reviewed
- June 7, 2026 · HireAIScore editorial team
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