| Price from | $29.08/mo | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| macOS | — | Yes |
| Linux | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 3 | 0 |
| Spec score · Email Server Software | 8.0 (#10) | 7.2 (#21) |
| Spec score · Mail Server Software | 8.0 (#13) | 7.2 (#30) |
| Integrations | The documentation describes an Elasticsearch integration for PRO log viewing and names Uptime Kuma, Prometheus, and Grafana as external monitoring systems that can use its monitoring API. | The add-on directory lists third-party tools for authentication, content filtering, policy services, webmail, and other functions; entries are maintained by their authors without formal evaluation. |
| Product | Poste.io is a self-hosted email server with web administration, webmail, spam protection, and mail server components in one Docker container. | Postfix is Wietse Venema’s mail server, created as an alternative to Sendmail. |
| Support | The pricing page includes email support with PRO and PRO+, while FREE is marked as not including it. | The postfix-users mailing list is for questions, problem reports, and feature requests; non-member postings are silently discarded. |