Open Source Encrypted Communication Tools
A curated collection of the best open source communication tools that use end-to-end encryption.
Secure collaboration platform for mission-critical work
Stars
38,871Last commit
13 hours agoLicense
Unknown
Mattermost provides a flexible, open-source platform for secure team collaboration, designed for organizations with strict security and privacy requirements.
Open Source Alternative to:
Private messaging with end-to-end encryption
Stars
29,235Last commit
18 hours agoLicense
AGPL-3.0
Secure messaging app with state-of-the-art encryption, voice/video calls, group chats, and file sharing. No ads, trackers, or data collection.
Open Source Alternative to:
Open source messaging with privacy and community focus
Stars
10,092Last commit
21 hours agoLicense
AGPL-3.0
Free, open-source instant messaging and VoIP platform with full Markdown support, voice/video calls, moderation tools, and self-hosting options for communities.
Open Source Alternative to:
Secure, decentralized messaging for teams and individuals
Stars
13,397Last commit
23 hours agoLicense
AGPL-3.0
Open-source platform for encrypted communication, file sharing, and collaboration based on the Matrix protocol.
Open Source Alternative to:
Secure email, calendar and contacts with end-to-end encryption
Stars
7,864Last commit
23 hours agoLicense
GPL-3.0
Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking.
Open Source Alternative to:
Secure and elegant Matrix client for seamless conversations
Stars
3,855Last commit
8 days agoLicense
AGPL-3.0
Cinny offers a simple, elegant, and secure interface for Matrix-based conversations, protected by end-to-end encryption.
Open Source Alternative to:
Group chat for friends and communities, without the baggage
Stars
3,245Last commit
1 day agoLicense
Unknown
Self-hostable group chat with servers, channels, voice, and moderation tools. No ads, no data mining, built under EU privacy law.
Open Source Alternative to:
Serverless team chat over Tor, no phone number needed
Stars
2,639Last commit
1 day agoLicense
GPL-3.0
Quiet is a peer-to-peer messaging app that syncs messages directly between devices over Tor, with no central server, no phone number required, and no metadata leaks.
Open Source Alternative to:
Secure collaboration platform with end-to-end encryption
Stars
2,543Last commit
8 months agoLicense
GPL-3.0
A comprehensive collaboration platform offering end-to-end encrypted messaging, file sharing, and video calls with enterprise-grade security and compliance features.
Open Source Alternative to:
Secure, scalable chat server for modern applications
Stars
158Last commit
2 days agoLicense
GPL-3.0
Open source chat server with end-to-end encryption, clustering support, and comprehensive messaging features for building real-time communication apps
Open Source Alternative to:
c15t – Open-source cookie banner, built for control and lightening fast modern web apps.
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