compare

Collabora Online vs mailcow

The same facts for both, read from GitHub every night, and the relation a person reviewed.

Collabora Online vs mailcow
Fact	Collabora Online	mailcow
Language	Shell	JavaScript
Licence	Other	GPL-3.0
Stars	3.4k	14k
Latest	25.04.7-mobile	2026-09a
Last push	2026-10-06	2026-10-06
Release cadence	about 11 days between releases	about 18 days between releases
Active contributors	6 commit authors on the default branch in the last 90 days	11 commit authors on the default branch in the last 90 days
Flags	none	none

How they relate

Both replace Microsoft 365. Alternatives to Microsoft 365 →
PartialCollabora OnlineBrowser editing of Word, Excel and PowerPoint files, without mail and Teams.
PartialmailcowMail, calendars and contacts; ActiveSync for mobile clients.