Customer.io vs. Brevo
Side-by-side across both vendors’ full G2 portfolios — reviews, ratings and category coverage aggregated to the company, not a single product.
| Metric | Customer.io | Brevo |
|---|---|---|
| Avg. rating | 4.4 | 4.5 |
| Total reviews | 990 | 2,772 |
| Review growth (QoQ) | +7.1% | +202.6% |
| Products on G2 | 1 | 1 |
| Categories covered | 7 | 22 |
| Best category rank | #1 in Transactional Email | #1 in Email Testing |
| Small Business | 59.3% | 84.0% |
| Mid-Market | 37.4% | 12.7% |
| Enterprise | 3.2% | 3.4% |