# Flow vs Stalwart Mail Server

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

| | Flow | Stalwart Mail Server |
|---|---|---|
| Score | 43/100 | 79/100 ✓ |
| Rank in category | #25 of 30 in Calendar & Contacts | #2 of 16 in Mail Server |
| GitHub stars | 157 | 15 470 ✓ |
| Stars, last 30 days | +0 | +667 ✓ |
| Stable releases, 12 months | 3 | 31 ✓ |
| Latest release | v0.7.0 · 22 Aug 2026 | v1.0.1 · 28 Oct 2026 ✓ |
| Setup | Moderate ✓ | Moderate |
| Official Docker image | No | Yes ✓ |
| License | AGPL-3.0 | AGPL-3.0-only AND LicenseRef-SEL |
| Main language | Dart | Rust |

## Which one should you pick?

Stalwart Mail Server scores 79/100 against 43/100 for Flow, so it is the safer default.

Stalwart Mail Server ships more often: 31 stable releases in the past year, against 3 for Flow.

Stalwart Mail Server is growing faster right now (+667 stars in 30 days).

## Details

- [Flow](https://selfhost.directory/project/flow) (markdown: https://selfhost.directory/project/flow.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/flow-vs-stalwart-mail-server