IceWarp vs OpenSMTPD
IceWarp
icewarp.comOpenSMTPD
opensmtpd.orgSide by side
| Figure | IceWarp | OpenSMTPD |
|---|---|---|
| Price from | $1.35/mo | Free |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | — |
| macOS | Yes | Yes |
| Linux | — | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 3 | 1 |
| Spec score · Mail Server Software | 8.3 (#5) | 7.4 (#28) |
| Security | The pricing page lists antivirus and antispam with Core, while the site footer displays ISO 9001, ISO 27001, ISO 27017, ISO 27018, ISO 29119-1, SOC 2, and HIPAA compliance badges. | Project goals include careful validity checks on network input and privilege separation to mitigate possible security bugs. |
| Support | The pricing page lists 24/7 support for cloud customers and offers Cloud Plus support with a 24/7 hotline and stated response targets. | The project is volunteer-developed and is not backed by a commercial entity. |