Himalaya vs smtp4dev
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?
Himalaya
Modern command-line email client written in Rust
VS
smtp4dev
Fake SMTP server for development email testing
| Feature | Himalaya | smtp4dev |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | MIT | GPL-3.0 |
| Language | Rust | C# |
| Setup difficulty | Medium | Easy |
| Min. RAM | 64 MB | 128 MB |
| Deployment | binary, source | docker, binary |
| GitHub stars | ★ 6,962 | ★ 3,941 |
| First released | 2021 | 2015 |
| Replaces | Mutt, Outlook | Mailtrap |
Why pick each one
Choose Himalaya if…
- Released under the MIT license
- Mature project with 7k GitHub stars
- Written in Rust
- Tiny footprint — runs in 64 MB RAM
Frequently asked questions
Is Himalaya or smtp4dev better?
Neither is universally better. Himalaya has the larger community, while smtp4dev is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Himalaya and smtp4dev free and open-source?
Yes. Himalaya is licensed under MIT and smtp4dev under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Himalaya and smtp4dev with Docker?
Himalaya: check the project docs for container support. smtp4dev: yes.