Open-source projects tagged “slack”
Open-source and self-hostable projects tagged “slack” on GitHub, with license, free-edition limits and setup checked against official sources.
- Metabase
A business intelligence tool where people ask questions of their databases through a query builder or SQL and build dashboards.
Stars50kLast commitOct 15, 2026LicenseAGPL-3.0 - Rocket.Chat
A self-hostable team communications platform with chat, channels, and omnichannel customer messaging.
Stars46kLast commitOct 15, 2026LicenseMIT - Outline
A team knowledge base and wiki with real-time editing, search and integrations, offered as a hosted service or as a self-hosted install.
Stars41kLast commitOct 15, 2026LicenseBUSL-1.1 - Zulip
A self-hostable team chat app that organizes every conversation into topics inside channels.
Stars26kLast commitOct 14, 2026LicenseApache-2.0
