Element (Matrix)
Communication
Open-source, decentralised messaging built on the Matrix protocol.
Alternative to
ChatE2EESelf-host
Visit siteEuropean alternatives
European alternatives to Slack
2 European and sovereignty-friendly options that can replace Slack — chosen for parent-company jurisdiction and EU/UK data residency, not just features.
UK
Wire
Communication
End-to-end encrypted collaboration for security-conscious teams.
ChatCallsE2EE
Visit siteListings describe governance and geography (parent-company jurisdiction) — not a verdict on Slack or any provider. Real-world sovereignty also depends on hosting region and sub-processors, which vary by deployment and should be verified. Browse the full directory.
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