Collabora Online vs Stalwart

Collabora Online vs Stalwart
Fact	Collabora Online	Stalwart
Language	Shell	Rust
Licence	Other	None detected
Stars	3.4k	15k
Latest	25.04.7-mobile	v0.16.25
Last push	2026-10-06	2026-10-05
Release cadence	about 11 days between releases	about 7 days between releases
Active contributors	6 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 Microsoft 365. Alternatives to Microsoft 365 →
PartialCollabora OnlineBrowser editing of Word, Excel and PowerPoint files, without mail and Teams.
PartialStalwartMail, calendars and contacts only.

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…

✓ signed The latest release, 25.04.7-mobile, carries a signature GitHub verified.

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unsigned The latest release, v0.16.25, carries no signature GitHub could verify.

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