Best Open Source Encrypted Communication Tools using Dependabot in 2026

Mattermost

Secure collaboration platform for mission-critical work

Stars
36,683
Forks
8,612
Last commit
11 hours ago

Mattermost provides a flexible, open-source platform for secure team collaboration, designed for organizations with strict security and privacy requirements.

Open Source Alternative to:

Microsoft Teams

Signal

Private messaging with end-to-end encryption

Stars
28,794
Forks
6,724
Last commit
1 day ago

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:

Session

Cinny

Secure and elegant Matrix client for seamless conversations

Stars
3,629
Forks
519
Last commit
17 hours ago

Cinny offers a simple, elegant, and secure interface for Matrix-based conversations, protected by end-to-end encryption.

Open Source Alternative to:

Discord

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Mattermost

Secure collaboration platform for mission-critical work

Stars
36,683
Forks
8,612
Last commit
11 hours ago

Mattermost provides a flexible, open-source platform for secure team collaboration, designed for organizations with strict security and privacy requirements.

Open Source Alternative to:

Microsoft Teams