ADP has a Proven Score of 79/100 (Established). Justworks has a Proven Score of 66/100 (Established). ADP ranks higher in Payroll & HR. Both are in Payroll & HR on the Proven Trust Index. Vendors cannot pay to change a score. Scores can't be bought.
| Input | ADP | Justworks |
|---|---|---|
| Proven marketplaces | 13.4 / 15 | 12.8 / 15 |
| Member redemption clicks | 6.5 / 15 | 6.9 / 15 |
| Client quality | 20 / 20 | 6 / 20 |
| Operating tenure | 10 / 10 | 9.3 / 10 |
| Market standing | 10 / 10 | 6 / 10 |
| Connected relationships | 7.3 / 10 | 10 / 10 |
| Connected data | 0 / 5 | 5 / 5 |
Shared
No recorded best-for field differs.
ADP · Justworks · Best Payroll & HR for startups, ranked by the Proven Trust Index
Data updated 2026-10-27.
Source: Proven platform data, public records and vendor websites. Vendors cannot pay to change a score. Scores can't be bought. Data updated 2026-10-27. About the data · Proven