Zellis vs. ADP
Side-by-side across both vendors’ full G2 portfolios — reviews, ratings and category coverage aggregated to the company, not a single product.
| Metric | Zellis | ADP |
|---|---|---|
| Avg. rating | 4.2 | 4.4 |
| Total reviews | 15 | 12,800 |
| Review growth (QoQ) | — | -5.4% |
| Products on G2 | 1 | 21 |
| Categories covered | 14 | 34 |
| Best category rank | — | #1 in Core HR |
| Small Business | 13.3% | 57.2% |
| Mid-Market | 6.7% | 32.0% |
| Enterprise | 80.0% | 10.7% |