Open Source Alternatives to Slack
What is Slack?
Slack is a cloud-based team collaboration platform that organizes communication into channels, integrating with various tools and services.. There are currently 18 open-source alternatives to Slack, with a combined total of 146.3k GitHub stars. The most common language among these projects is TypeScript.
Showing 18 open-source alternatives
An open-source, self-hosted collaboration platform with chat, automation, voice, and AI for secure software development.
An open source, self-hosted collaboration platform with chat, workflow automation, voice calling, screen sharing, and AI integration.
Open-source team chat with topic-based threading that combines the best of email and chat for productive remote work.
A glossy Matrix collaboration client for the web and desktop, enabling secure, decentralized communication.
A self-hosted chat application designed for small teams with persistent messaging, multiple rooms, and flexible deployment options.
A terminal-based Slack client for accessing Slack workspaces directly from the command line.
A self-hosted messaging platform for private communication with real-time chat, file sharing, and group conversations.
A React Native mobile app for the Rocket.Chat open-source team collaboration platform.
An open-source mobile group messaging app built with Flutter, featuring event organization, channels, and calendar integration.
A cross-platform desktop application for Rocket.Chat built with Electron, providing secure communication for mission-critical operations.
Cross-platform desktop client for Wire, a secure messaging and collaboration platform, built with Electron.
An experimental team chat app with a novel UI based on short conversations, designed to reduce interruptions and FOMO.
A simple command-line interface for Slack, designed for terminal enthusiasts who want to chat without leaving their CLI.
A Slack-like real-time chat application built with Elixir, Phoenix, and React.
An open-source, self-hostable communication tool with messaging, video calls, and screen sharing for company use.
Official Angular SDK for Stream Chat, providing components and services to build chat applications.
A Home Assistant add-on providing a self-hosted Matrix server for secure, decentralized communication.
A Slack bot that archives all public chat messages into Apache Cassandra for unlimited message history lookup.
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