| Price from | Free | $0.83/mo |
| Free plan | Yes | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 2 |
| Spec score · Mail Server Software | 8.4 (#2) | 8.3 (#6) |
| Administration | Administrators can manage the server through WebAdmin and automate operations with the command-line interface and CLI API. | Its web interface supports domain-level administrators, user self-service, message throttling, and account search. |
| Deployment | The product is downloadable for Linux and Windows and offers Docker images and Kubernetes deployment with AxiHelm. | The Enterprise Edition is an on-premises product that keeps data on the user's own server. |
| Founded | 2004 | 2007 |
| Support | The support page says business and channel support engineers are available around the clock, with an average response time under two hours for all issue types. | Enterprise Edition pricing includes technical support; general technical questions and issues can also be posted to the online forum. |
