Slack
Team communication is vital, but data sovereignty matters for EU businesses.
Wire
🇩🇪Wire is an end-to-end encrypted, open-source collaboration platform. Conferencing and files. Wire says it can be deployed in the cloud, on-premises or as a hybrid setup.
Mattermost
🇩🇪Mattermost says it offers self-hosted, air-gapped collaboration. (EU Hosting available).
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