The result

1 point separates Gem and Bullhorn.

Gem (Sourcing) edges Bullhorn (ATS-integrated) by 1 point under rubric v1.0, 55 to 54. Bullhorn takes 3 of the 7 criteria, Article 11 Technical Documentation among them, against 4 for Gem, whose share includes Bias Audit Transparency. Bias Audit Transparency, at 18%, is the heaviest weighted swing and goes to Gem (Bullhorn 58, Gem 66), 46% of the weighted advantage it holds, while the widest raw gap is Post-Market Monitoring, Bullhorn 35 to Gem 47.

Criteria won

7 criteria

  • Bullhorn3
  • Gem4
Widest raw gap
Post-Market Monitoring35 vs 47
Heaviest weighted swing
Bias Audit Transparency18% weight

Keep this comparison

Both scores and all 7 criteria, side by side, in your inbox.

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The record

Categories, scope and company facts.

Bullhorn is filed under ATS-integrated AI, Gem under Candidate sourcing AI. They also share 1 secondary category: Screening.

RecordBullhornGem
Price tierHighHigh
HeadquartersUSUS
Founded19992017

What decides it

The criteria that move the gap, heaviest swing first.

  1. Bias Audit Transparency

    18% weight30% of the movement so far

    Bullhorn58
    Gem66

    1.4 weighted points to Gem

  2. Post-Market Monitoring

    12% weight59% of the movement so far

    Bullhorn35
    Gem47

    1.4 weighted points to Gem

  3. Article 11 Technical Documentation

    20% weight76% of the movement so far

    Bullhorn62
    Gem58

    0.8 weighted points to Bullhorn

  4. FRIA Support

    15% weight85% of the movement so far

    Bullhorn38
    Gem35

    0.4 weighted points to Bullhorn

  5. Data Governance Disclosure

    15% weight94% of the movement so far

    Bullhorn60
    Gem57

    0.4 weighted points to Bullhorn

  6. Customer Documentation

    8% weight98% of the movement so far

    Bullhorn60
    Gem62

    0.2 weighted points to Gem

  7. Human Oversight Design

    12% weight100% of the movement so far

    Bullhorn60
    Gem61

    0.1 weighted points to Gem

Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to -1.5 — the difference between the two totals before either is rounded. Shares are of 4.9 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 -1.5.

Category-by-category

Raw score per criterion, with weighted delta.

Δ is Bullhorn minus Gem, coloured for whichever of the two it favours.

CategoryWeightBullhornGemΔ rawΔ weighted
Article 11 Technical Documentation20%6258+4+0.8
Bias Audit Transparency18%5866-8-1.4
FRIA Support15%3835+3+0.4
Data Governance Disclosure15%6057+3+0.4
Human Oversight Design12%6061-1-0.1
Post-Market Monitoring12%3547-12-1.4
Customer Documentation8%6062-2-0.2
Total100%54F55F-1-1.5

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.

CriterionWeightBullhornGem
CitedAbsencesAudit / hostingCitedAbsencesAudit / hosting
Article 11 Technical Documentation20%21Sources on the vendor's own domain21Audit reportSources on the vendor's own domainSources on a separate domain
Bias Audit Transparency18%31Audit reportSources on the vendor's own domain30Audit reportSources on the vendor's own domainSources on a separate domain
FRIA Support15%11—21Sources on the vendor's own domain
Data Governance Disclosure15%30Sources on the vendor's own domain30Audit reportSources on the vendor's own domain
Human Oversight Design12%21Sources on the vendor's own domain30Audit reportSources on the vendor's own domainSources on a separate domain
Post-Market Monitoring12%11Sources on the vendor's own domain30Sources on the vendor's own domain
Customer Documentation8%31Sources on the vendor's own domain30Sources on the vendor's own domain
All criteria100%156Audit reportSources on the vendor's own domain192Audit reportSources on the vendor's own domainSources on a separate domain

Bullhorn has 20 evidence rows across 7 of 7 criteria — 15 with a source URL, 6 documented absences; Gem has 21 evidence rows across 7 of 7 criteria — 19 with a source URL, 2 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 41 evidence rows on file for these two vendors: 20 for Bullhorn, across 2 distinct source domains, and 21 for Gem, across 2 distinct source domains.

Rubric
v1.0
Bullhorn last reviewed
June 7, 2026 · HireAIScore editorial team
Gem 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.

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