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Team Chat Software & Alternatives

Real-time team messaging and channel-based chat platforms.

Mastodon

Federated microblogging server.

5K stars open source
Team Chat Social Networks & Fediverse

Rocket.Chat

Communications platform that puts data protection first (alternative to Gitter.im and Slack).

45.4K stars open source
Team Chat

Mattermost

Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack).

37.1K stars open source
Team Chat HR CRM & Support

AstrBot

AI Agent Assistant & development framework that integrates lots of IM platforms, LLMs, plugins and AI feature, and can be your openclaw alternative. ✨

34.3K stars open source
Team Chat AI Agents

Huly

All-in-one project management platform (alternative to Linear, Jira, Slack, Notion, Motion).

26.1K stars open source
Note Taking Team Chat Project Management

Zulip

Zulip is a powerful, open source group chat application.

25.3K stars open source
Team Chat Communication

Mirai

高效率 QQ 机器人支持库

14.8K stars open source
Team Chat AI Agents

Tinode

Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots.

13.3K stars open source
Team Chat

SimpleX Chat

The most private and secure chat and applications platform - now with double ratchet E2E encryption.

11.2K stars open source
Team Chat Privacy & Anonymity

Centrifugo

Language-agnostic real-time messaging (Websocket or SockJS) server.

10.4K stars open source
Team Chat Web Servers

Berty

Berty is a secure peer-to-peer messaging app that works with or without internet access, cellular data or trust in the network

9.2K stars open source
Team Chat Mobile Development

Dogehouse

Taking voice conversations to the moon 🚀

9K stars open source
Team Chat Communication

CryptPad

Collaboration suite built to enable collaboration, synchronizing changes to documents in real time.

7.7K stars open source
Team Chat Office Suites

HuLa

🍀 A cross-platform instant messaging desktop application with exceptional performance built on Rust + Vue3, compatible with Windows, macOS, Linux, Android, and iOS（一款基于Rust+V... Read More

7.4K stars open source
Team Chat Communication

Colyseus

⚔ Multiplayer Framework for Node.js

7K stars open source
Team Chat Multiplayer & Networking

Ejabberd

XMPP instant messaging server.

6.7K stars open source
Team Chat Privacy & Anonymity

Typehero

Connect, collaborate, and grow with a community of TypeScript developers

6.6K stars open source
Team Chat Documentation

Remark42

Lightweight and simple comment engine, which doesn't spy on users. It can be embedded into blogs, articles or any other place where readers add comments.

5.5K stars open source
Team Chat

WorkAdventure

Virtual office / virtual conference application presented as a 16-bit RPG video game.

5.5K stars open source
Team Chat Video Conferencing

Dootask

DooTask是一款开源在线项目任务管理工具，提供各类文档协作工具、在线思维导图、在线流程图、项目管理、任务分发、即时IM，文件管理等工具；同时消息功能使用非对称加密技术让你的沟通更安全。 Read More

5.5K stars open source
Team Chat Task & To-Do Apps Project Management

Colanode

Collaboration suite with real-time messaging, rich text pages, file management, and dynamic databases - built for offline work (alternative to Slack, Notion).

4.9K stars open source
File Sync & Share Note Taking Team Chat

About Team Chat Software

Best open source team chat alternatives.