Mailspring vs MailWhale
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?
Mailspring
Cross-platform desktop email client
VS
MailWhale
Self-hosted transactional email relay with API
| Feature | Mailspring | MailWhale |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | GPL-3.0 | MIT |
| Language | JavaScript | Go |
| Setup difficulty | Easy | Easy |
| Min. RAM | 512 MB | 64 MB |
| Deployment | binary, source | docker, binary, source |
| GitHub stars | ★ 17,730 | ★ 372 |
| First released | 2017 | 2021 |
| Replaces | Outlook, Apple Mail | SendGrid, Postmark |
Why pick each one
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
Choose MailWhale if…
- Released under the MIT license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Written in Go
Frequently asked questions
Is Mailspring or MailWhale better?
Neither is universally better. Mailspring has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are Mailspring and MailWhale free and open-source?
Yes. Mailspring is licensed under GPL-3.0 and MailWhale under MIT. Both can be self-hosted at no software cost.
Can I run Mailspring and MailWhale with Docker?
Mailspring: check the project docs for container support. MailWhale: yes.