Chatmail vs mailcow
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Chatmail
Minimal, instant-onboarding mail server for Delta Chat
VS
mailcow
Dockerized full-stack mail server suite
| Feature | Chatmail | mailcow |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | MPL-2.0 | GPL-3.0 |
| Language | Python | JavaScript |
| Setup difficulty | Medium | Medium |
| Min. RAM | 512 MB | 6,144 MB |
| Deployment | docker, bare-metal, source | docker |
| GitHub stars | ★ 476 | ★ 13,245 |
| First released | 2023 | 2016 |
| Replaces | Microsoft Exchange, Google Workspace |
Why pick each one
Choose Chatmail if…
- Released under the MPL-2.0 license
- First-class Docker support for quick deployment
- Written in Python
- Lightweight — runs in 512 MB RAM
Frequently asked questions
Is Chatmail 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 Chatmail and mailcow free and open-source?
Yes. Chatmail is licensed under MPL-2.0 and mailcow under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Chatmail and mailcow with Docker?
Chatmail: yes. mailcow: yes.