FlagsmithvsStalwart Mail Server
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Flagsmith | Stalwart Mail Server | |
|---|---|---|
| Score | 73/100 | 79/100 |
| Rank in category | #2 of 8 in Feature Flags | #2 of 16 in Mail Server |
| GitHub stars | 6 630 | 15 485 |
| Stars, last 30 days | +61 | +682 |
| Stable releases, 12 months | 68 | 31 |
| Latest release | v2.288.2 · 29 Oct 2026 | v1.0.1 · 28 Oct 2026 |
| Setup | Moderate | Moderate |
| Official Docker image | Yes | Yes |
| License | BSD-3-Clause | AGPL-3.0-only AND LicenseRef-SEL |
| Main language | Python | Rust |
Which one should you pick?
Stalwart Mail Server scores 79/100 against 73/100 for Flagsmith, so it is the safer default.
Flagsmith ships more often: 68 stable releases in the past year, against 31 for Stalwart Mail Server.
Stalwart Mail Server is growing faster right now (+682 stars in 30 days).
Flagsmith details →Stalwart Mail Server details →
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