Mattermost Alternatives
Safer and better-maintained options, ranked by Nerq Trust Score. Updated 2026-09-11.
Mattermost has a Nerq Trust Score of 62 (C+). Open source messaging for teams. Slack alternative.
| # | Name | Trust | Grade | Stars | Key Difference |
|---|
FAQ
What are the best alternatives to Mattermost?
The top alternatives based on Nerq Trust Score are listed above, all independently evaluated for security and reliability.
Is it safe to switch from Mattermost?
Check each alternative's safety report by clicking its name. Trust scores above 70 indicate strong reliability.
How does Nerq rank Mattermost alternatives?
Alternatives are ranked by Trust Score v2, combining security, maintenance, documentation, and community signals.