Mattermost

Open-source self-hosted team chat with channels, threads, calls, playbooks and developer integrations.

Open source

Active

Facts

Made by: Mattermost, Inc.
Website: mattermost.com
License: License: Open sourceAGPL-3.0-only
Pricing: Free tier with paid plansSelf-hosted Entry edition is free with 10,000 messages of history and community support. Paid plans remove the limits and add support.
Platforms: Windows
macOS
Linux
Web
iOS
Android
Self-hosted
Self-hostable: Yes
Works offline: No
Account required: Yes
Maturity: Stable
Source code: github: mattermost/mattermost
Maintenance: Status: ActiveLast commit Oct 8, 2026

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Repository checks, newest first; last checked Oct 8, 2026. Checks older than 90 days are kept as one per week.

Repository checks for Mattermost
Checked	Last commit	Latest release	Stars	State
Oct 8, 2026	Oct 8, 2026	v11.11.1	39,294	Open

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