Open source slack projects
Every project in the registry tagged slack, ranked by real GitHub adoption.
Self-hosted team messaging with voice, video, and AI
Fast, collaborative wiki for teams who need organized docs
Organized team chat for distributed teams
dbt enables data analysts and engineers to transform their data using the same practices that software engineers use to build applications.
Build your own AI SRE agents. The open source toolkit for the AI era.
Prometheus Alertmanager
Self-hosted team workspace with chat, docs, and databases
Next generation noIM application in your own workspace, not only another Slack/Discord/Rocket.chat
A community discussion platform: Brings together the main features from StackOverflow, Slack, Discourse, Reddit, and Disqus blog comments.
Real time communication for agents. Wake on message, channels, DMs and actions. Useful for orchestrating agents.
Related tags
Frequently asked questions
How many open source slack projects are there?
This registry tracks 10 projects tagged slack, with 160,813 GitHub stars between them. The most-adopted is Rocket.Chat at 46,358 stars.
Are these slack projects free to use?
Yes — 8 of the 10 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which slack project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these slack projects still maintained?
8 of the 10 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.