Alert21 vs Clickatell SMS API
| Alert21 | Clickatell SMS API | |
|---|---|---|
| Free plan | Yes | |
| Free trial | Yes | |
| Paid from | Free | |
| Platforms | Web | api, Web |
| Pay-as-you-go | Yes | |
| SMS API | Yes | |
| Delivery status | Yes | |
| Webhooks | Yes | |
| Two-way SMS | Yes | |
| Inbound webhooks | Yes | |
| Short code support | Yes | |
| Toll-free numbers | Yes | |
| AI responses | Yes | |
| Workflow builder | Yes | |
| Interactive menus | Yes | |
| API access | Yes | |
| Free plan | No | |
| Paid from | 125 /mo | |
| Shared inbox | Yes | |
| Template management | Yes | |
| Media messaging | Yes | |
| Automation workflows | Yes | |
| Message pricing model | hybrid |
Listed together in Best Transactional SMS Software