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