Google Chat
Team messaging inside Google Workspace, following Google's product decisions.
4 self-hosted replacements in this index, ranked by GitHub stars in the dataset.
Replacements
Rocket.Chat
Communications platform that puts data protection first.
46,357 stars Active
31 Oct 2026 9.0.0-rc.3
Mattermost
Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab.
39,499 stars Active
2 Nov 2026 v11.7.15-rc1
Zulip
Powerful group chat application.
26,154 stars Active
1 Nov 2026 13.0-rc1
Element
Fully-featured Matrix client for Web, iOS & Android.
13,633 stars Active
30 Oct 2026 v1.12.33
Popular comparisons
The most-starred pairings among these replacements, ranked by combined GitHub stars in the dataset.