Collaborative Chat

Mattermost

Communications & Messaging Cross-platform Self-hosting Freemium

Mattermost is an open-source collaborative chat for teams.

Communications & Messaging Cross-platform Freemium

Wire is a secure group communication suite that offers secure messaging, video conferencing, and file sharing.

Communications & Messaging Cross-platform Self-hosting Freemium

Zulip is an open-source collaborative chat for teams.