Microsoft Teams
Chat and meetings bundled with Microsoft 365, administered through Microsoft's tenant system.
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
Jitsi Meet
WebRTC application that uses Jitsi Videobridge to provide high quality, scalable video conferences.
30,180 stars Active
31 Oct 2026 stable/jitsi-meet_11248
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.