GatewayAPI vs MessageFlow SMS API
| GatewayAPI | MessageFlow SMS API | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Web | Web |
| Free plan | No | No |
| SMS API | — | Yes |
| Delivery status | — | Yes |
| Webhooks | — | Yes |
| Two-way messaging | — | Yes |
| Monthly message limit | — | 0 messages/mo |
Both are listed in Best Transactional SMS Software. On Samsung Mobile US Press, GatewayAPI scores higher on our published basis.