Vertex Inc. vs. Zamp
Side-by-side across both vendors’ full G2 portfolios — reviews, ratings and category coverage aggregated to the company, not a single product.
| Metric | Vertex Inc. | Zamp |
|---|---|---|
| Avg. rating | 4.4 | 4.7 |
| Total reviews | 504 | 52 |
| Review growth (QoQ) | -100.0% | +166.7% |
| Products on G2 | 1 | 1 |
| Categories covered | 3 | 1 |
| Best category rank | #2 in Sales Tax and VAT Compliance | #7 in Sales Tax and VAT Compliance |
| Small Business | 19.9% | 91.3% |
| Mid-Market | 23.9% | 8.7% |
| Enterprise | 56.2% | 0.0% |