Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.
SMTP and IMAP with spam and virus filtering, configured from files, without webmail.
alternatives to
Google Workspace
Google's hosted mail on your own domain, with calendars, documents and storage. A closed product from Google.
Side by side
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| docker-mailserver | Partial | 19k | MIT | Open source | Yes | Shell | v16.0.1 | 2026-10-04 |
| Mail-in-a-Box | Partial | 15k | CC0-1.0 | Not checked | Yes | Python | v77 | 2026-09-26 |
| Stalwart | Partial | 15k | None detected | Open core | Yes | Rust | v0.16.25 | 2026-10-05 |
| mailcow | Partial | 14k | GPL-3.0 | Open source | Yes | JavaScript | 2026-09a | 2026-10-06 |
| Mailu | Partial | 7.5k | Other | Open source | Yes | Python | 2024.06.61 | 2026-10-06 |
| Roundcube | Partial | 7.2k | GPL-3.0 | Open source | Yes | PHP | 1.7.4 | 2026-10-02 |
| Maddy | Partial | 6.1k | GPL-3.0 | Open source | Yes | Go | v0.9.6 | 2026-10-03 |
| Mox | Partial | 5.9k | MIT | Open source | Yes | Go | v0.0.17 | 2026-09-13 |
| Modoboa | Partial | 3.5k | ISC | Open source | Yes | Python | 2.11.0 | 2026-10-06 |
| iRedMail | Partial | 1.8k | GPL-3.0 | Open source | Yes | Shell | 1.8.8 | 2026-09-23 |
Every alternative
10 alternatives
Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.
Mail, contacts and calendars for your own domains on one Ubuntu server, without the office apps.
All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).
Mail over JMAP, IMAP and SMTP, plus CalDAV and CardDAV, in one Rust server.
mailcow: dockerized - 🐮 + 🐋 = 💕
Mail, calendars and contacts with SOGo webmail; no office suite.
- Language
- JavaScript
- Licence
- GPL-3.0
- Stars
- 14k
- Latest
- 2026-09a
- Last push
- 2026-10-06
Insular email distribution - mail server as Docker images
Mail with webmail, spam filtering and an admin UI.
- Language
- Python
- Licence
- Other
- Stars
- 7.5k
- Latest
- 2024.06.61
- Last push
- 2026-10-06
The Roundcube Webmail suite
Webmail with an address book and plugins, on top of an IMAP and SMTP server you run.
✉️ Composable all-in-one mail server.
SMTP, IMAP, DKIM, SPF and DMARC in one Go binary; mail only.
modern full-featured open source secure mail server for low-maintenance self-hosted email
SMTP, IMAP, webmail, spam filtering and automatic TLS in one Go binary; mail only.
Mail hosting made simple
A web admin and webmail that sets up Postfix and Dovecot for mail, calendars and contacts.
Full-featured, open source mail server solution for mainstream Linux/BSD distributions.
A shell script that installs and configures Postfix, Dovecot, webmail and spam filtering on one server.
Head to head
- docker-mailserver vs iRedMail
- docker-mailserver vs Maddy
- docker-mailserver vs Mail-in-a-Box
- docker-mailserver vs mailcow
- docker-mailserver vs Mailu
- docker-mailserver vs Modoboa
- docker-mailserver vs Mox
- docker-mailserver vs Roundcube
- docker-mailserver vs Stalwart
- iRedMail vs Maddy
- iRedMail vs Mail-in-a-Box
- iRedMail vs mailcow
- iRedMail vs Mailu
- iRedMail vs Modoboa
- iRedMail vs Mox
- iRedMail vs Roundcube
- iRedMail vs Stalwart
- Maddy vs Mail-in-a-Box
- Maddy vs mailcow
- Maddy vs Mailu
- Maddy vs Modoboa
- Maddy vs Mox
- Maddy vs Roundcube
- Maddy vs Stalwart
- Mail-in-a-Box vs mailcow
- Mail-in-a-Box vs Mailu
- Mail-in-a-Box vs Modoboa
- Mail-in-a-Box vs Mox
- Mail-in-a-Box vs Roundcube
- Mail-in-a-Box vs Stalwart
- mailcow vs Mailu
- mailcow vs Modoboa
- mailcow vs Mox
- mailcow vs Roundcube
- mailcow vs Stalwart
- Mailu vs Modoboa
- Mailu vs Mox
- Mailu vs Roundcube
- Mailu vs Stalwart
- Modoboa vs Mox
- Modoboa vs Roundcube
- Modoboa vs Stalwart
- Mox vs Roundcube
- Mox vs Stalwart
- Roundcube vs Stalwart
About Google Workspace
- Vendor