Twake Workplace
Open-source collaboration suite developed by French company Linagora. Combines Matrix-based messaging, cloud drive, mail, and calendar in one platform. EU-hosted and self-hostable.
Quick facts
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Twake Workplace
Wire
StackfieldWhat does it replace?
Slack 
Google Workspace 
Microsoft 365 
Dingtalk More European Team communication alternatives
Wire
82 · Strongly EuropeanSwiss end-to-end encrypted messaging and collaboration platform for enterprise and government use. Backed by Schwarz Group (Lidl/Kaufland), hosted in the EU, and used by security-conscious organisations across Europe.
Stackfield
86 · Strongly EuropeanGerman all-in-one collaboration platform combining team chat, project management, video conferencing, and document editing. All data stored exclusively in Germany with end-to-end encryption. ISO 27001 certified. Used by 10,000+ companies.
Element
75 · Strongly EuropeanEuropean secure communications platform built on the open Matrix protocol. Used by NATO, the EU, French and German governments, and 47M+ users across 80,000+ deployments. Self-hostable with full end-to-end encryption.