Stalwart Mail ServervsUltimate Certificate Manager
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Stalwart Mail Server | Ultimate Certificate Manager | |
|---|---|---|
| Score | 78/100 | 50/100 |
| Rank in category | #2 of 16 in Mail Server | #4 of 8 in Certificate Management |
| GitHub stars | 15 464 | 170 |
| Stars, last 30 days | +680 | — |
| Stable releases, 12 months | 31 | 4 |
| Latest release | v1.0.1 · 28 Oct 2026 | v2.246 · 27 Oct 2026 |
| Setup | Moderate | Moderate |
| Official Docker image | Yes | Yes |
| License | AGPL-3.0-only AND LicenseRef-SEL | AGPL-3.0 |
| Main language | Rust | Python |
Which one should you pick?
Stalwart Mail Server scores 78/100 against 50/100 for Ultimate Certificate Manager, so it is the safer default.
Stalwart Mail Server ships more often: 31 stable releases in the past year, against 4 for Ultimate Certificate Manager.
Stalwart Mail Server is growing faster right now (+680 stars in 30 days).
Stalwart Mail Server details →Ultimate Certificate Manager details →
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