Mattermost
Open source platform for secure collaboration. Slack alternative with full control over your data.
82 thriving
Health Breakdown Updated 2026-03-06
1 open security advisory.
Development Activity 85
145 commits in 30d, 28 active contributors
Issue Responsiveness 72
75% closed, 1 open security advisory
Community Engagement 88
+280 stars in 30d, 83% resolved in SRG
Maintenance Signals 84
Last commit 1d ago, release 19d ago
30,200 Stars
+280 30d growth
145 Commits/30d
28 Active devs
MIT License