Customer.io vs. OneSignal
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 | OneSignal |
|---|---|---|
| Avg. rating | 4.4 | 4.7 |
| Total reviews | 990 | 1,244 |
| Review growth (QoQ) | +7.1% | +33.3% |
| Products on G2 | 1 | 1 |
| Categories covered | 7 | 6 |
| Best category rank | #1 in Transactional Email | #2 in Push Notification |
| Small Business | 59.3% | 65.7% |
| Mid-Market | 37.4% | 27.6% |
| Enterprise | 3.2% | 6.7% |