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Mattermost

35.1k stars
Website Source Code

Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab

Categories

Communication - Custom Communication Systems

Additional Information

Alternative to: Slack

Platforms

Go
Docker
K8S

Licenses

GNU Affero General Public License 3.0 / Apache, Version 2.0

Last Updated

January 27, 2026

Current Release

v11.4.0-rc2
Released January 27, 2026

Commit Activity

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