Mailpit vs Sup
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?
| Feature | Mailpit | Sup |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | MIT | GPL-2.0 |
| Language | Go | Ruby |
| Setup difficulty | Easy | Medium |
| Min. RAM | 64 MB | 128 MB |
| Deployment | docker, binary | binary, source |
| GitHub stars | ★ 10,067 | ★ 970 |
| First released | 2022 | 2007 |
| Replaces | Mailtrap, MailHog | Mutt |
Why pick each one
Choose Sup if…
- Released under the GPL-2.0 license
- Written in Ruby
- Tiny footprint — runs in 128 MB RAM
Frequently asked questions
Is Mailpit or Sup better?
Mailpit is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider Sup if its specific feature set fits your needs better.
Are Mailpit and Sup free and open-source?
Yes. Mailpit is licensed under MIT and Sup under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Mailpit and Sup with Docker?
Mailpit: yes. Sup: check the project docs for container support.