Claws Mail vs NeoMutt
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Claws Mail | NeoMutt |
|---|---|---|
| Deploy effort | Read-the-docs project | Read-the-docs project |
| Category | Mail Servers | Mail Servers |
| License | GPL-3.0 | GPL-2.0 |
| Language | C | C |
| Setup difficulty | Easy | Medium |
| Min. RAM | 128 MB | 64 MB |
| Deployment | binary, source | binary, source |
| GitHub stars | ★ 200 | ★ 3,839 |
| First released | 2001 | 2016 |
| Replaces | Microsoft Outlook | Microsoft Outlook |
What are Claws Mail and NeoMutt?
Claws Mail
Claws Mail is a fast, lightweight, and highly configurable email client built with GTK. It supports IMAP, POP3, and a wide range of plugins for extending its functionality.
- Fast lightweight client
- IMAP and POP3 support
- Extensive plugin system
- Highly configurable
NeoMutt
NeoMutt is a command-line email client that builds on Mutt with additional features and patches integrated. It supports IMAP, POP3, notmuch, and a highly customizable keyboard-driven interface.
- Terminal email client
- IMAP, POP3, and notmuch
- Highly customizable
- Keyboard-driven
Claws Mail vs NeoMutt: key differences
Both projects are written in C. Licensing differs — GPL-3.0 for Claws Mail versus GPL-2.0 for NeoMutt. NeoMutt is the lighter option, starting around 64 MB of RAM against 128 MB for Claws Mail. Claws Mail is the more established project (first released 2001), while NeoMutt arrived in 2016. NeoMutt has the considerably larger community, at 3,839 GitHub stars versus 200.
Why pick each one
Choose Claws Mail if…
- Released under the GPL-3.0 license
- Easy to set up — beginner-friendly
- Written in C
- Tiny footprint — runs in 128 MB RAM
Choose NeoMutt if…
- Released under the GPL-2.0 license
- Active community (3.8k GitHub stars)
- Written in C
- Tiny footprint — runs in 64 MB RAM
Frequently asked questions
Is Claws Mail or NeoMutt better?
Neither is universally better. NeoMutt has the larger community, while Claws Mail is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Claws Mail and NeoMutt free and open-source?
Yes. Claws Mail is licensed under GPL-3.0 and NeoMutt under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Claws Mail and NeoMutt with Docker?
Claws Mail: check the project docs for container support. NeoMutt: check the project docs for container support.
Which is lighter on resources, Claws Mail or NeoMutt?
NeoMutt has the smaller minimum footprint at 64 MB of RAM, compared to about 128 MB for Claws Mail. Real-world usage depends on library size, user count, and enabled features.