Mattermost

KommunikationotherFreemiumWebWindowsmacOSLinuxAndroidiOSSelf-Hosted

Secure team messaging platform with channels, file sharing, and workflow automation for enterprises

GitHub Repository Official Website

GitHub stars

Alternative to

Slack

Kommunikation

Microsoft Teams

Kommunikation

BigBlueButton

Web conferencing system designed for online learning with whiteboard, polling, and breakout rooms

LGPL-3.0Free

Signal

Private messenger with end-to-end encryption for secure text, voice, and video communication

AGPL-3.0Free

Session

Anonymous messenger requiring no phone number with decentralized network and end-to-end encryption

GPL-3.0Free

Jitsi Meet

Secure video conferencing solution with screen sharing, chat, and recording without account required

Apache-2.0Free

Revolt

User-first chat platform with servers, channels, and bots built for communities and friends

AGPL-3.0Free

Galene

Lightweight videoconference server optimized for large groups with low bandwidth requirements

MITFree

Mattermost

GitHub stars

Alternative to

BigBlueButton

Signal

Session

Jitsi Meet

Revolt

Galene

Recensioner

Mattermost

GitHub stars

Alternative to

BigBlueButton

Signal

Session

Jitsi Meet

Revolt

Galene

Recensioner

Mattermost

GitHub stars

Alternative to

Related Alternatives

BigBlueButton

Signal

Session

Jitsi Meet

Revolt

Galene

Recensioner

Mattermost

GitHub stars

Alternative to

Related Alternatives

BigBlueButton

Signal

Session

Jitsi Meet

Revolt

Galene

Recensioner