Chat, Video & Collaboration – Alt-to-Apps Atlas

About Chat, Video & Collaboration

Alternatives to Slack, Microsoft Teams, Zoom, Discord.

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Chat, Video & Collaboration

Mattermost — Slack alternative
Rocket.Chat — Team chat
Zulip — Threaded chat
Matrix / Element — Federated messaging
Jitsi Meet — Video conferencing
BigBlueButton — Virtual classrooms
OnlyOffice Docs — Collaborative docs
Collabora Online — LibreOffice online
Etherpad — Real‑time editor
CryptPad — E2E encrypted collaboration
Excalidraw — Whiteboard (self‑hostable)