European alternatives to Slack
Team messaging and collaboration platform, acquired by Salesforce in 2021.
About Slack
- Company
- Slack Technologies LLC · Salesforce Inc.
- HQ
- United States
- Zone
- Outside Europe
Key concerns
Twake Workplace
100 · Certified EuropeanOpen-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.
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.
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.
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.
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Why avoid United States-owned services?
CLOUD Act
Allows US authorities to compel American companies to hand over data stored anywhere in the world.
FISA Section 702
Permits mass surveillance of non-US persons' data held by US tech providers, without a warrant.
GDPR vs US law
Transferring personal data to US companies may conflict with EU data protection rules under GDPR.