| Price from | €8.90/mo | $29.08/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 7 | 3 |
| Spec score · Mail Server Software | 8.4 (#3) | 8.0 (#13) |
| Administration | The mailcow web interface lets administrators create domains and email addresses and manage most settings. | The product includes web administration, a REST API, mailbox quotas, and per-mailbox settings. |
| Headquarters | Willich, Germany | Klatovy, Czech Republic |
| Integrations | The documentation lists client setup guides for Android, Apple macOS/iOS, eM Client, KDE Kontact, Outlook, and Thunderbird. | 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. |
| Product | mailcow: dockerized is an open-source groupware and email suite based on Docker. | Poste.io is a self-hosted email server with web administration, webmail, spam protection, and mail server components in one Docker container. |
| Security | Two-factor authentication options include YubiKey OTP, WebAuthn, and TOTP. | The feature page states that TLS is used on every protocol, passwords use salted SHA512, and SPF, DKIM, DMARC, and SRS are supported. |
| Support | Commercial support is available through Servercow, while community support is voluntary, best-effort, and not guaranteed. | The pricing page includes email support with PRO and PRO+, while FREE is marked as not including it. |
