Sierra vs. Retell AI
Side-by-side across both vendors’ full G2 portfolios — reviews, ratings and category coverage aggregated to the company, not a single product.
| Metric | Sierra | Retell AI |
|---|---|---|
| Avg. rating | 4.5 | 4.8 |
| Total reviews | 131 | 2,640 |
| Review growth (QoQ) | — | -99.8% |
| Products on G2 | 1 | 1 |
| Categories covered | 4 | 6 |
| Best category rank | #3 in Bot Platforms | #1 in AI Voice Assistants |
| Small Business | 53.1% | 85.9% |
| Mid-Market | 34.4% | 14.1% |
| Enterprise | 12.5% | 0.0% |