§ The result
Bullhorn leads Willo by 13 points.
Bullhorn sits 13 points above Willo under rubric v1.0 — 54 against 41 — with Bullhorn filed under ATS-integrated and Willo under Video interview. Bullhorn leads 5 of the 7 criteria, including Bias Audit Transparency, while Willo leads 2, including Human Oversight Design. Bias Audit Transparency is the widest raw gap and the heaviest weighted swing at once (Bullhorn 58, Willo 30, 18% weight), but it accounts for only 38% of the weighted advantage Bullhorn holds across the 5 criteria on that side of the table.
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
Willo
Willo is a browser-based asynchronous (one-way) video interview platform that lets employers collect recorded video, audio, multiple-choice and written candidate responses, then uses AI to transcribe, summarize, rank candidates against employer-defined "Blueprint" criteria, and flag scripted or AI-generated answers.
§ The record
Bullhorn is filed under ATS-integrated AI, Willo under Video interview AI. They also share 1 secondary category: Screening.
Both are in scope of EU AI Act, NYC LL 144, Colorado AI Act and Illinois HB 3773. Only Willo is in scope of Mobley v. Workday.
| Record | Bullhorn | Willo |
|---|---|---|
| Price tier | High | Low |
| Headquarters | US | GB |
| Founded | 1999 | 2018 |
§ What decides it
The criteria that move the gap, heaviest swing first.
18% weight · 37% of the movement so far
Bias Audit Transparency
Bullhorn 58 · Willo 30
5.0 weighted points to Bullhorn
20% weight · 72% of the movement so far
Article 11 Technical Documentation
Bullhorn 62 · Willo 38
4.8 weighted points to Bullhorn
15% weight · 86% of the movement so far
FRIA Support
Bullhorn 38 · Willo 25
1.9 weighted points to Bullhorn
15% weight · 94% of the movement so far
Data Governance Disclosure
Bullhorn 60 · Willo 53
1.1 weighted points to Bullhorn
8% weight · 97% of the movement so far
Customer Documentation
Bullhorn 60 · Willo 54
0.5 weighted points to Bullhorn
12% weight · 99% of the movement so far
Human Oversight Design
Bullhorn 60 · Willo 62
0.2 weighted points to Willo
12% weight · 100% of the movement so far
Post-Market Monitoring
Bullhorn 35 · Willo 36
0.1 weighted points to Willo
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +13.0 — the difference between the two totals before either is rounded. Shares are of 13.7 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +13 beside that +13.0.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Bullhorn minus Willo.
| Category | Weight | Bullhorn | Willo | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 62 | 38 | +24 | +4.8 |
| Bias Audit Transparency | 18% | 58 | 30 | +28 | +5.0 |
| FRIA Support | 15% | 38 | 25 | +13 | +1.9 |
| Data Governance Disclosure | 15% | 60 | 53 | +7 | +1.1 |
| Human Oversight Design | 12% | 60 | 62 | -2 | -0.2 |
| Post-Market Monitoring | 12% | 35 | 36 | -1 | -0.1 |
| Customer Documentation | 8% | 60 | 54 | +6 | +0.5 |
| Total | 100% | 54 (F) | 41 (F) | +13 | +13.0 |
§ 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 | Willo | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 2 | 1 | Sources on the vendor's own domain | 2 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 3 | 1 | Audit reportSources on the vendor's own domain | 1 | 1 | — |
| FRIA Support | 15% | 1 | 1 | — | 0 | 1 | — |
| Data Governance Disclosure | 15% | 3 | 0 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 2 | 1 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Post-Market Monitoring | 12% | 1 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 3 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 15 | 6 | Audit reportSources on the vendor's own domain | 9 | 5 | Sources on the vendor's own domain |
Bullhorn has 20 evidence rows across 7 of 7 criteria — 15 with a source URL, 6 documented absences; Willo has 14 evidence rows across 7 of 7 criteria — 9 with a source URL, 5 documented absences.
Provenance
The scores above are documented by 34 evidence rows on file for these two vendors: 20 for Bullhorn, across 2 distinct source domains, and 14 for Willo, across 1 distinct source domain.
- Rubric
- v1.0
- Bullhorn last reviewed
- June 7, 2026 · HireAIScore editorial team
- Willo 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.
§ Where next