open-web-calendarvsStalwart Mail Server
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| open-web-calendar | Stalwart Mail Server | |
|---|---|---|
| Score | 53/100 | 78/100 |
| Rank in category | #9 of 30 in Calendar & Contacts | #2 of 16 in Mail Server |
| GitHub stars | 334 | 15 458 |
| Stars, last 30 days | — | +674 |
| Stable releases, 12 months | 0 | 30 |
| Latest release | — | v1.0.0 · 26 Oct 2026 |
| Setup | Moderate | Moderate |
| Official Docker image | Yes | Yes |
| License | GPL-2.0 | AGPL-3.0-only AND LicenseRef-SEL |
| Main language | Python | Rust |
Which one should you pick?
Stalwart Mail Server scores 78/100 against 53/100 for open-web-calendar, so it is the safer default.
Stalwart Mail Server ships more often: 30 stable releases in the past year, against 0 for open-web-calendar.
Stalwart Mail Server is growing faster right now (+674 stars in 30 days).
open-web-calendar details →Stalwart Mail Server details →
Swap a project
Keep open-web-calendar, compare it with
Keep Stalwart Mail Server, compare it with