compare
mailcow vs Stalwart
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | mailcow | Stalwart |
|---|---|---|
| Language | JavaScript | Rust |
| Licence | GPL-3.0 | None detected |
| Stars | 14k | 15k |
| Latest | 2026-09a | v0.16.25 |
| Last push | 2026-10-06 | 2026-10-05 |
| Release cadence | about 18 days between releases | about 7 days between releases |
| Active contributors | 11 commit authors on the default branch in the last 90 days | 6 commit authors on the default branch in the last 90 days |
| Flags | none | No licence detected |
How they relate
Both replace Google Workspace. Alternatives to Google Workspace →
PartialmailcowMail, calendars and contacts with SOGo webmail; no office suite.
PartialStalwartMail over JMAP, IMAP and SMTP, plus CalDAV and CardDAV, in one Rust server.
Both replace Microsoft 365. Alternatives to Microsoft 365 →
PartialmailcowMail, calendars and contacts; ActiveSync for mobile clients.
PartialStalwartMail, calendars and contacts only.
mailcow
- 2026-09a2026-10-06🍂🐮 Mootember 2026 | Unbound 1.26.1, SOGo 5.12.11 & Redis 7.4.11 - Revision A
- 2026-092026-09-21🍂🐮 Mootember 2026 | Unbound 1.26.1, SOGo 5.12.11 & Redis 7.4.11
- 2026-07b2026-08-18🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3 - Revision B
- 2026-07a2026-07-30🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3 - Revision A
- 2026-072026-07-13🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3
Stalwart
- v0.16.252026-10-05If you are upgrading from v0.16.x, replace the binary (or run docker pull). If you are upgrading from v0.15.x and below…
- v0.16.242026-09-27If you are upgrading from v0.16.x, replace the binary (or run docker pull). If you are upgrading from v0.15.x and below…
- v0.16.232026-09-21If you are upgrading from v0.16.x, replace the binary (or run docker pull). If you are upgrading from v0.15.x and below…
- v0.16.222026-09-13If you are upgrading from v0.16.x, replace the binary (or run docker pull). If you are upgrading from v0.15.x and below…
- v0.16.212026-09-06If you are upgrading from v0.16.x, replace the binary (or run docker pull). If you are upgrading from v0.15.x and below…
mailcow
✓ signed The latest release, 2026-09a, carries a signature GitHub verified.
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Stalwart
unsigned The latest release, v0.16.25, carries no signature GitHub could verify.
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