Home / Team Communication / Mattermost

Mattermost — open source alternative

Slack-style open source team messaging.

Strengths

  • Familiar Slack-like UX.
  • Strong self-hosting story and enterprise features.
  • Good permission and compliance controls.

Weaknesses

  • Some advanced features require paid tier.
  • Mobile app performance is acceptable but not stellar.
  • Larger install footprint than lightweight chats.
License: AGPL-3.0 / Apache-2.0 (modules) Self-host difficulty: 3/5 Hosted cloud optionDesktop: Windows, macOS, LinuxMobile: iOS, Android

Official site · Source on GitHub

Ad slot — OSS middle

Mattermost is used as an alternative to

Slack

Team messaging with channels, threads and integrations.

See all alternatives →

Discord

Voice, video and text chat — popular with gamers and communities.

See all alternatives →

Microsoft Teams

Video, chat and collaboration bundled with Microsoft 365.

See all alternatives →

More open source in this category

Discover other projects tagged Team Communication on the category page.