# Claper vs Stalwart Mail Server

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

| | Claper | Stalwart Mail Server |
|---|---|---|
| Score | 59/100 | 79/100 ✓ |
| Rank in category | #8 of 18 in Content Management | #2 of 16 in Mail Server |
| GitHub stars | 821 | 15 473 ✓ |
| Stars, last 30 days | +16 | +670 ✓ |
| Stable releases, 12 months | 8 | 31 ✓ |
| Latest release | v3.2.0 · 27 Oct 2026 | v1.0.1 · 28 Oct 2026 ✓ |
| Setup | Moderate ✓ | Moderate |
| Official Docker image | Yes | Yes |
| License | AGPL-3.0 | AGPL-3.0-only AND LicenseRef-SEL |
| Main language | Elixir | Rust |

## Which one should you pick?

Stalwart Mail Server scores 79/100 against 59/100 for Claper, so it is the safer default.

Stalwart Mail Server ships more often: 31 stable releases in the past year, against 8 for Claper.

Stalwart Mail Server is growing faster right now (+670 stars in 30 days).

## Details

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

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