Best Open Source Communication Projects
Mastodon
Free, open-source decentralized social media platform
Rocket.Chat
The secure communications platform for mission-critical operations.
Mattermost
Mission-critical collaboration for technical teams
Jitsi
Encrypted video meetings without limitations
Signal
Speak freely with state-of-the-art end-to-end encryption.
Zulip
Chat for distributed teams.
Element
Secure collaboration and messaging
Spectrum
Chat-based community platform from the former Spectrum team
Fonoster
Open-source alternative to Twilio
Roundcube
Browser-based IMAP email client
Fosscord
Open-source Discord-compatible chat platform
Isso
Isso: a Disqus alternative for comments.
WriteFreely
A clean, minimalist publishing platform for writers.
MiroTalk P2P
Peer-to-peer video calls with end-to-end encryption
RainLoop Webmail
Simple, modern web-based email client
Cinny
Matrix client for desktop and web
MiroTalk
Browser-based video conferencing with maximum quality
Helpy
Open source helpdesk software for secure, multi-channel support.
Revolt
An open-source, privacy-respecting chat platform prioritizing user freedom.
SOGo
A fully supported and trusted groupware server.
Movim
Decentralized social platform on XMPP
Twake
The open Digital Workplace for team collaboration.
Friendica
Decentralized social network platform
Briefing
Modern video conferencing solution