Modoboa vs mailcow
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
mailcow
Dockerized full-stack mail server suite
| Feature | Modoboa | mailcow |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 88 · Excellent | 94 · Excellent |
| Category | Mail Servers | Mail Servers |
| License | ISC | GPL-3.0 |
| Language | Python | JavaScript |
| Setup difficulty | Medium | Medium |
| Min. RAM | 2,048 MB | 6,144 MB |
| Deployment | docker, bare-metal | docker |
| GitHub stars | ★ 3,538 | ★ 13,498 |
| First released | 2010 | 2016 |
| Replaces | Google Workspace, cPanel Email | Microsoft Exchange, Google Workspace |
What are Modoboa and mailcow?
Modoboa
Modoboa is a mail hosting and management platform that provides a clean web interface on top of Postfix and Dovecot. It includes antispam, webmail, calendar, and DNS health checks.
- Modern mail administration UI
- Amavis and Rspamd antispam
- Built-in webmail and calendar
- DNSBL and configuration health checks
mailcow
mailcow is a complete, Docker-based mail server solution that bundles Postfix, Dovecot, Rspamd, SOGo, and a modern web UI. It makes running a full-featured mail server with antispam and webmail straightforward.
- Complete Docker mail stack
- Rspamd antispam built in
- SOGo webmail and ActiveSync
- Modern management UI with API
Modoboa vs mailcow: key differences
Modoboa is written in Python, while mailcow is built with JavaScript. Licensing differs — ISC for Modoboa versus GPL-3.0 for mailcow. Modoboa is the lighter option, starting around 2,048 MB of RAM against 6,144 MB for mailcow. Modoboa is the more established project (first released 2010), while mailcow arrived in 2016. Mailcow has the considerably larger community, at 13,498 GitHub stars versus 3,538.
Why pick each one
Choose Modoboa if…
- Friendly management interface
- Good monitoring features
Watch out for
- Installer can be finicky
- Multiple components to maintain
Choose mailcow if…
- All components preconfigured
- Active community
Watch out for
- Substantial RAM requirements
- Many containers to manage
Frequently asked questions
Is Modoboa or mailcow better?
Neither is universally better. mailcow has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Modoboa and mailcow free and open-source?
Yes. Modoboa is licensed under ISC and mailcow under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Modoboa and mailcow with Docker?
Modoboa: yes. mailcow: yes.
Which is lighter on resources, Modoboa or mailcow?
Modoboa has the smaller minimum footprint at 2,048 MB of RAM, compared to about 6,144 MB for mailcow. Real-world usage depends on library size, user count, and enabled features.