Open source chat projects
Every project in the registry tagged chat, ranked by real GitHub adoption.
Self-hosted team messaging with voice, video, and AI
AI second brain for research, automation, and personal agents
Open-source 24/7 Cowork app for OpenClaw, Hermes, Claude Code, Codex, OpenCode and 20+ more CLI Agent | Customize your assistants | Team them up｜Star if you lik
Organized team chat for distributed teams
Build your own federated discussion community
Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots
Take control over your live stream video by running it yourself. Streaming + chat out of the box.
Self-hosted team workspace with chat, docs, and databases
Open-source customer communication platform
Serverless team chat over Tor, no phone number needed
开源在线客服系统GO语言开发GO-FLY,免费在线客服系统/GOFLY LIVE CHAT: open source self-hosted private cloud customer support live chat software by golang
💬 Chat with anyone on any website.
Secure peer-to-peer chat that is serverless, decentralized, and ephemeral
OpenVidu Platform: self-hosted real-time video and audio for your apps, built on LiveKit and mediasoup
Movim - Decentralized social platform
Twake is a secure open source collaboration platform to improve organizational productivity.
A community discussion platform: Brings together the main features from StackOverflow, Slack, Discourse, Reddit, and Disqus blog comments.
Create custom spaces to chat, game, and connect globally
Transform team email into efficient collaborative workflows
Decentralized private messenger with chat-shared tools and games for Desktop
AI chat companion with versatile model support
Lightweight, self-hosted, open-source chat server with voice, video, text, and screen sharing. Built for small groups who want privacy, simplicity, and full con
All-in-one native macOS AI chat application for virtually any AI provider
A modern, self-hosted team chat built on Cloudflare — realtime messaging, Telegram bridge, encrypted messages & files, and WebMCP. | 基于 Cloudflare 的现代自部署团队聊天系统：
One-click, privacy-first exporter for Claude.ai chats — clean Markdown with artifacts and attachments, ready for Obsidian and RAG.
Messaging SDK with AI agents for web, iOS, and Android
Community-driven platform built for transparency
Secure, scalable chat server for modern applications
No-code platform to build AI agents and automate support
Related tags
Frequently asked questions
How many open source chat projects are there?
This registry tracks 29 projects tagged chat, with 220,382 GitHub stars between them. The most-adopted is Rocket.Chat at 46,133 stars.
Are these chat projects free to use?
Yes — 25 of the 29 carry an explicit open-source licence across 5 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 chat 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 chat projects still maintained?
24 of the 29 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.