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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

    38,959

  • Forks

    9,954

  • Last commit

    11 hours ago
Favicon of Huly website

Huly

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

  • Stars

    2,276

  • Forks

    320

  • Last commit

    13 hours ago
Favicon of UnInbox website

UnInbox

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 A replacement for outdated email technology and tools.

  • Stars

    1,110

  • Forks

    77

  • Last commit

    18 hours ago
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