Mailpile vs MailCatcher
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?
Mailpile
Privacy-focused, searchable email client
VS
MailCatcher
Catch-all SMTP server for inspecting test email
| Feature | Mailpile | MailCatcher |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | AGPL-3.0 | MIT |
| Language | Python | Ruby |
| Setup difficulty | Medium | Easy |
| Min. RAM | 512 MB | 128 MB |
| Deployment | bare-metal, source | docker, binary, source |
| GitHub stars | ★ 8,825 | ★ 6,774 |
| First released | 2013 | 2010 |
| Replaces | Gmail | Mailtrap |
Why pick each one
Choose Mailpile if…
- Released under the AGPL-3.0 license
- Mature project with 8.8k GitHub stars
- Written in Python
- Lightweight — runs in 512 MB RAM
Choose MailCatcher if…
- Released under the MIT license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Mature project with 6.8k GitHub stars
Frequently asked questions
Is Mailpile or MailCatcher better?
Neither is universally better. Mailpile has the larger community, while MailCatcher is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Mailpile and MailCatcher free and open-source?
Yes. Mailpile is licensed under AGPL-3.0 and MailCatcher under MIT. Both can be self-hosted at no software cost.
Can I run Mailpile and MailCatcher with Docker?
Mailpile: check the project docs for container support. MailCatcher: yes.