§ The result
Saville Assessment leads Willo by 7 points.
Under rubric v1.0, Saville Assessment, filed under Assessment, finishes on 48 and Willo, filed under Video interview, on 41, 7 points apart. Willo takes 1 of the 7 criteria, Human Oversight Design among them, against 6 for Saville Assessment, whose share includes Article 11 Technical Documentation. The widest raw gap and the heaviest weighted swing fall on different criteria: FRIA Support (Saville Assessment 40, Willo 25) and Article 11 Technical Documentation at 20% (Saville Assessment 50, Willo 38), the second being 31% of the weighted advantage Saville Assessment holds across the 6 criteria on that side of the table.
Vendor profile
Saville Assessment
Saville Assessment publishes the Wave personality questionnaires, Swift aptitude tests and situational judgment tests. They are scored automatically against norm groups and delivered through the Oasys platform, the Wave Connect hiring platform (which uses AI to build role profiles from job descriptions) and a two-minute Screener that returns a fit band into the employer's ATS.
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
Saville Assessment is filed under Assessment AI, Willo under Video interview AI. They also share 1 secondary category: Screening.
Both are in scope of NYC LL 144, Illinois HB 3773, EU AI Act, Colorado AI Act and Mobley v. Workday.
| Record | Saville Assessment | Willo |
|---|---|---|
| Price tier | Enterprise | Low |
| Headquarters | GB | GB |
| Founded | 2004 | 2018 |
§ What decides it
The criteria that move the gap, heaviest swing first.
20% weight · 28% of the movement so far
Article 11 Technical Documentation
Saville Assessment 50 · Willo 38
2.4 weighted points to Saville Assessment
15% weight · 54% of the movement so far
FRIA Support
Saville Assessment 40 · Willo 25
2.3 weighted points to Saville Assessment
18% weight · 79% of the movement so far
Bias Audit Transparency
Saville Assessment 42 · Willo 30
2.2 weighted points to Saville Assessment
12% weight · 88% of the movement so far
Human Oversight Design
Saville Assessment 55 · Willo 62
0.8 weighted points to Willo
8% weight · 94% of the movement so far
Customer Documentation
Saville Assessment 60 · Willo 54
0.5 weighted points to Saville Assessment
15% weight · 97% of the movement so far
Data Governance Disclosure
Saville Assessment 55 · Willo 53
0.3 weighted points to Saville Assessment
12% weight · 100% of the movement so far
Post-Market Monitoring
Saville Assessment 38 · Willo 36
0.2 weighted points to Saville Assessment
Weighted delta is the raw difference times the criterion weight, so the 7 figures above sum to +7.0 — the difference between the two totals before either is rounded. Shares are of 8.7 points of movement counted without direction. The table below rounds each side to a whole number first, so its Δ raw total reads +7 beside that +7.0.
§ Category-by-category
Raw score per criterion, with weighted delta.
Δ is Saville Assessment minus Willo.
| Category | Weight | Saville Assessment | Willo | Δ raw | Δ weighted |
|---|---|---|---|---|---|
| Article 11 Technical Documentation | 20% | 50 | 38 | +12 | +2.4 |
| Bias Audit Transparency | 18% | 42 | 30 | +12 | +2.2 |
| FRIA Support | 15% | 40 | 25 | +15 | +2.3 |
| Data Governance Disclosure | 15% | 55 | 53 | +2 | +0.3 |
| Human Oversight Design | 12% | 55 | 62 | -7 | -0.8 |
| Post-Market Monitoring | 12% | 38 | 36 | +2 | +0.2 |
| Customer Documentation | 8% | 60 | 54 | +6 | +0.5 |
| Total | 100% | 48 (F) | 41 (F) | +7 | +7.0 |
§ 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 | Saville Assessment | Willo | ||||
|---|---|---|---|---|---|---|---|
| Cited | Absences | Audit / hosting | Cited | Absences | Audit / hosting | ||
| Article 11 Technical Documentation | 20% | 5 | 1 | Audit reportSources on the vendor's own domainSources on a separate domain | 2 | 1 | Sources on the vendor's own domain |
| Bias Audit Transparency | 18% | 4 | 1 | Audit reportSources on the vendor's own domainSources on a separate domain | 1 | 1 | — |
| FRIA Support | 15% | 3 | 1 | Sources on the vendor's own domain | 0 | 1 | — |
| Data Governance Disclosure | 15% | 5 | 1 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Human Oversight Design | 12% | 6 | 0 | Sources on the vendor's own domain | 2 | 0 | Sources on the vendor's own domain |
| Post-Market Monitoring | 12% | 5 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| Customer Documentation | 8% | 6 | 1 | Sources on the vendor's own domain | 1 | 1 | Sources on the vendor's own domain |
| All criteria | 100% | 34 | 6 | Audit reportSources on the vendor's own domainSources on a separate domain | 9 | 5 | Sources on the vendor's own domain |
Saville Assessment has 40 evidence rows across 7 of 7 criteria — 34 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; some documentation or audit rows for Saville Assessment sit on a domain separate from the vendor's own site.
Provenance
The scores above are documented by 54 evidence rows on file for these two vendors: 40 for Saville Assessment, across 2 distinct source domains, and 14 for Willo, across 1 distinct source domain.
- Rubric
- v1.0
- Saville Assessment last reviewed
- September 25, 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