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Best Open Source Slack Alternatives

Find the best alternatives to Slack that are open source and free to use/self-hostable.

Favicon of Slack website

Slack

A collaboration hub that brings the right people, information, and tools together to get work done in companies or teams.

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Favicon of Rocket.Chat website

Rocket.Chat

The communications platform that puts data protection first.

  • Stars

    38,848

  • Forks

    9,903

  • Last commit

    3 days ago
Favicon of Huly website

Huly

All-in-One Project Management Platform. Alternative to Linear, Jira, Slack, Notion, and Motion

  • Stars

    2,190

  • Forks

    314

  • Last commit

    1 day ago
Favicon of UnInbox website

UnInbox

Modern email for teams and professionals. A replacement for outdated email technology and tools.

  • Stars

    1,078

  • Forks

    71

  • Last commit

    2 days ago
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