Rocket.Chat
Self-hosted team chat with voice, video, and omnichannel support
Key differentiator
Rocket
45,303 stars13,569 forksTypeScript
Alternative To
Best Alternatives to Microsoft Teams
A unified communication and collaboration platform from Microsoft, combining workplace chat, video meetings, file storage, and application integration, often used in enterprise settings.
Why people leave Microsoft Teams
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13 alternatives to Microsoft Teams
Free
Prose
Decentralized open source workplace with chat and docs
Key differentiator
It is a decentralized, open-source workplace communication platform powered by XMPP, offering secure and transparent team messaging
36 stars4 forksRust
VoceChat
Lightweight self-hosted chat server with embeddable widget
Key differentiator
It is a lightweight, self-hostable chat application and framework built with Rust, offering private in-app messaging and AI bot integration
52 stars10 forksTypeScript
Adapt
Lightweight self-hosted messaging platform for teams
Key differentiator
It is a lightweight, customizable, and open-source messaging platform focused on user privacy and community building
1 stars0 forks
MiroTalk
Free browser-based video calls with no sign-up required
Key differentiator
It offers free, secure, and fast browser-based video calls, chat, and screen sharing with no downloads or logins required
4,526 stars730 forksJavaScript
SpacebarChat
Free open source Discord reimplementation with full API parity
Key differentiator
It is a free, open-source Discord reimplementation, offering self-hosted, secure communication similar to Slack and Rocket
2,149 stars303 forksTypeScript
Converse.js
Self-hosted web-based XMPP chat client for any server
Key differentiator
An open-source, web-based XMPP chat client offering self-hosting, customization, and end-to-end encryption for secure messaging
3,248 stars820 forksJavaScript
Revolt
Self-hosted open source Discord alternative with servers
Key differentiator
Revolt is a self-hosted Discord alternative with servers, channels, voice chat, and bot support, built for community privacy
2,335 stars56 forks
Matrix
Open protocol for secure, decentralized messaging and VoIP
Key differentiator
An open protocol for secure, decentralized communication, enabling real-time messaging, VoIP, and data transfer across platforms
12,082 stars2,118 forksPython
Zulip
Organized team chat with threaded conversations, self-hostable
Key differentiator
An organized team chat app designed for distributed teams, offering features like threaded conversations and powerful search
25,166 stars9,825 forksPython
Jitsi
Free video conferencing you can self-host with no account needed
Key differentiator
It is a free, open-source video conferencing solution for web and mobile, offering secure, flexible, and feature-rich communication capabilities
29,213 stars7,905 forksTypeScript
Mattermost
Team messaging for security-sensitive teams with air-gap support
Key differentiator
Mattermost is a self-hosted team messaging platform with channels, threads, integrations, and workflow automation for security-sensitive organizations
36,696 stars8,612 forksTypeScript
Wire
End-to-end encrypted messaging, voice, and file sharing
Key differentiator
A secure collaboration platform offering encrypted messaging, voice, video, and file sharing for privacy-conscious teams and enterprises
2,767 stars334 forksHaskell