# Stalwart Mail Server vs Workout.cool

> Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.

| | Stalwart Mail Server | Workout.cool |
|---|---|---|
| Score | 78/100 ✓ | 66/100 |
| Rank in category | #2 of 16 in Mail Server | #2 of 11 in Fitness Tracker |
| GitHub stars | 15 462 ✓ | 8 650 |
| Stars, last 30 days | +678 ✓ | +155 |
| Stable releases, 12 months | 30 ✓ | 1 |
| Latest release | v1.0.0 · 26 Oct 2026 ✓ | v1.3.2 · 7 Dec 2025 |
| Setup | Moderate | Easy ✓ |
| Official Docker image | Yes ✓ | No |
| License | AGPL-3.0-only AND LicenseRef-SEL | MIT |
| Main language | Rust | Typescript |

## Which one should you pick?

Stalwart Mail Server scores 78/100 against 66/100 for Workout.cool, so it is the safer default.

Stalwart Mail Server ships more often: 30 stable releases in the past year, against 1 for Workout.cool.

If you want the quickest setup, Workout.cool is easier to run; Stalwart Mail Server needs more configuration.

Stalwart Mail Server is growing faster right now (+678 stars in 30 days).

## Details

- [Stalwart Mail Server](https://selfhost.directory/project/stalwart-mail-server) (markdown: https://selfhost.directory/project/stalwart-mail-server.md)
- [Workout.cool](https://selfhost.directory/project/workout-cool) (markdown: https://selfhost.directory/project/workout-cool.md)

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Source: https://selfhost.directory/compare/stalwart-mail-server-vs-workout-cool