Best Open-Source Communication & Collaboration

26 tools found

Rocket.Chat

Omnichannel open-source customer and team chat hub built with Javascript.

45.9kLinuxmacOSWindowstoday

MITTeam Chat & Collaboration

Mattermost

Secure open-source developer collaboration and chat platform built for technical teams.

38.6kLinuxmacOSWindowstoday

AGPL-3.0Team Chat & Collaboration

Chatwoot

Customer chat engagement tool offering shared inboxes and live chat widgets.

35.3kLinuxmacOSWindowstoday

MITHelpdesk & Support

Jitsi Meet

Fully encrypted browser video conferencing client running without app downloads.

29.7kLinuxmacOSWindows2d ago

Apache-2.0Video Conferencing

Zulip

Async-oriented team chat software offering structured email-like threaded messaging.

25.6kLinuxmacOSWindows1d ago

Apache-2.0Team Chat & Collaboration

Forem

Open-source software for building modern, independent, and developer-focused community forums.

22.8kLinuxmacOSDocker2d ago

AGPL-3.0Forums & Discussions

UVdesk

SaaS-like open-source helpdesk system built using the PHP Symfony framework.

19.5kLinuxmacOSWindows10mo ago

MITHelpdesk & Support

Thunderbird

Free desktop email client, calendar coordinator, and RSS reader.

13.8kLinuxmacOSWindows2d ago

GPL-3.0Email Clients & Productivity

K-9 Mail

Android email client managing search, push mail, and multi-folder sync.

13.8kandroid2d ago

Apache-2.0Email Clients & Productivity

Matrix Synapse

Reference homeserver implementation for secure, decentralized Matrix network messaging.

12.1kLinuxmacOSWindows2y ago

Apache-2.0Team Chat & Collaboration

BigBlueButton

Web conferencing solution built for online schools and virtual classrooms.

9.2kLinuxDockerWebtoday

LGPL-3.0Video Conferencing

Mailpile

Self-hosted email client emphasizing encryption, privacy, and speed.

8.8kLinuxmacOSWindows3y ago

AGPL-3.0Email Clients & Productivity

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