imapsync vs Mailspring
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?
imapsync
Synchronization and migration tool between IMAP accounts
VS
Mailspring
Cross-platform desktop email client
| Feature | imapsync | Mailspring |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | GPL-3.0 | GPL-3.0 |
| Language | Shell | JavaScript |
| Setup difficulty | Medium | Easy |
| Min. RAM | 64 MB | 512 MB |
| Deployment | binary, source | binary, source |
| GitHub stars | ★ 4,118 | ★ 17,730 |
| First released | 2003 | 2017 |
| Replaces | IMAP migration services | Outlook, Apple Mail |
Why pick each one
Choose imapsync if…
- Released under the GPL-3.0 license
- Active community (4.1k GitHub stars)
- Written in Shell
- Tiny footprint — runs in 64 MB RAM
Choose Mailspring if…
- Released under the GPL-3.0 license
- Easy to set up — beginner-friendly
- Mature project with 17.7k GitHub stars
- Written in JavaScript
Frequently asked questions
Is imapsync or Mailspring better?
Mailspring is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider imapsync if its specific feature set fits your needs better.
Are imapsync and Mailspring free and open-source?
Yes. imapsync is licensed under GPL-3.0 and Mailspring under GPL-3.0. Both can be self-hosted at no software cost.
Can I run imapsync and Mailspring with Docker?
imapsync: check the project docs for container support. Mailspring: check the project docs for container support.