§ The result
Bullhorn leads micro1 on all 7 criteria.
Bullhorn finishes 18 points clear of micro1 under rubric v1.0 — 54 against 36 — across the ATS-integrated and Screening cohorts. Of the 7 criteria micro1 wins none, and the narrowest lead Bullhorn holds is on Post-Market Monitoring, Bullhorn 35 to micro1 25. Even Bias Audit Transparency, the widest raw gap and the heaviest weighted swing (Bullhorn 58, micro1 20, 18% weight), is only 39% of the weighted advantage Bullhorn builds across the 7 criteria it leads.
Vendor profile
Bullhorn
Bullhorn is a cloud-based applicant tracking system and CRM for staffing and recruiting agencies, with AI features (Bullhorn Copilot/Amplify, automation, and Textkernel-powered search and match) that source, screen, and rank candidates against jobs.
Vendor profile
micro1
Zara, micro1's LLM-based AI interviewer, runs recorded, adaptive spoken interviews (with optional coding exercises and automated proctoring) and returns per-skill proficiency ratings, soft-skill ratings and a proctoring score; micro1 uses it to certify experts for its own AI-training talent network, and employers can use it through a client portal and API.
§ The record
Bullhorn is filed under ATS-integrated AI, micro1 under Screening AI. They record no secondary category in common.
Both are in scope of EU AI Act, NYC LL 144, Colorado AI Act and Illinois HB 3773. Only micro1 is in scope of Mobley v. Workday.
| Record | Bullhorn | micro1 |
|---|---|---|
| Price tier | High | Mid |
| Headquarters | US | US |
| Founded | 1999 | 2022 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 39% of the movement so far
Bias Audit Transparency
Bullhorn 58 · micro1 20
6.8 weighted points to Bullhorn
20% weight · 52% of the movement so far
Article 11 Technical Documentation
Bullhorn 62 · micro1 50
2.4 weighted points to Bullhorn
15% weight · 66% of the movement so far
FRIA Support
Bullhorn 38 · micro1 22
2.4 weighted points to Bullhorn
15% weight · 78% of the movement so far
Data Governance Disclosure
Bullhorn 60 · micro1 45
2.3 weighted points to Bullhorn
12% weight · 86% of the movement so far
Human Oversight Design
Bullhorn 60 · micro1 48
1.4 weighted points to Bullhorn
12% weight · 93% of the movement so far
Post-Market Monitoring
Bullhorn 35 · micro1 25
1.2 weighted points to Bullhorn
8% weight · 100% of the movement so far
Customer Documentation
Bullhorn 60 · micro1 45
1.2 weighted points to Bullhorn
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +17.7 — the difference between the two totals before either is rounded. Shares are of 17.7 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +18 beside that +17.7.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Bullhorn minus micro1.
| Category | Weight | Bullhorn | micro1 | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 62 | 50 | +12 | +2.4 |
| Bias Audit Transparency | 18% | 58 | 20 | +38 | +6.8 |
| FRIA Support | 15% | 38 | 22 | +16 | +2.4 |
| Data Governance Disclosure | 15% | 60 | 45 | +15 | +2.3 |
| Human Oversight Design | 12% | 60 | 48 | +12 | +1.4 |
| Post-Market Monitoring | 12% | 35 | 25 | +10 | +1.2 |
| Customer Documentation | 8% | 60 | 45 | +15 | +1.2 |
| Total | 100% | 54 (F) | 36 (F) | +18 | +17.7 |
§ 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 | Bullhorn | micro1 | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Sources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domainSources on a separate domain |
| Bias Audit Transparency | 18% | 3 | 1 | Audit reportSources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domainSources on a separate domain |
| FRIA Support | 15% | 1 | 1 | — | 1 | 2 | Sources on the vendor's own domain |
| Data Governance Disclosure | 15% | 3 | 0 | Sources on the vendor's own domain | 4 | 1 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 2 | 1 | Sources on the vendor's own domain | 7 | 0 | Sources on the vendor's own domainSources on a separate domain |
| Post-Market Monitoring | 12% | 1 | 1 | Sources on the vendor's own domain | 2 | 2 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 3 | 1 | Sources on the vendor's own domain | 3 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 15 | 6 | Audit reportSources on the vendor's own domain | 25 | 8 | Sources 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; micro1 has 33 evidence rows across 7 of 7 criteria — 25 with a source URL, 8 documented absences; some documentation or audit rows for micro1 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: 20 for Bullhorn, across 2 distinct source domains, and 33 for micro1, across 3 distinct source domains.
- Rubric
- v1.0
- Bullhorn last reviewed
- June 7, 2026 · HireAIScore editorial team
- micro1 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