Category: Collaboration

8 European alternatives to Slack — GDPR-compliant & EU-hosted.

Salesforce-owned messaging platform for team communication

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Facts

Headquarters: US (US)
Category: Collaboration
Type: Product
GDPR-compliant: Yes
Open-source: No
Data hosting: US

Top EU-based & GDPR-compliant alternatives to Slack

Teamwire
German enterprise messaging with GDPR compliance and MDM
DE · commercial
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Stackfield
German project management and team communication with encryption
DE · commercial
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Wire
End-to-end encrypted collaboration platform by Wire Swiss GmbH (Zug, Switzerland)
CH · open-source
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BigBlueButton (self-host)
Virtual classroom and video conferencing; self-hostable
EU · open-source
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CryptPad
End-to-end encrypted collaboration (FR/EU).
FR · open-source
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FluffyChat
Open-source Matrix chat client with focus on simplicity and privacy
DE · open-source
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HedgeDoc
Markdown collaboration; self-host.
DE · open-source
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Huly
Open-source project management and team collaboration platform (self-hosted only — vendor-hosted cloud service shut down in 2026 due to funding; huly.io hosted service discontinued)
PT · open-source
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Frequently asked questions

What is the best European alternative to Slack?

It depends on your use case. Strong EU alternatives to Slack include Teamwire, Stackfield and Wire. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Slack?

Yes. Open-source EU alternatives to Slack include Wire, BigBlueButton (self-host), CryptPad, FluffyChat, HedgeDoc and Huly. These keep your data fully under your own control and let you self-host if you want to.

Is Slack GDPR-compliant and where is the data hosted?

Slack is headquartered in US and hosts data in US. The vendor states it is GDPR-compliant, but the data falls under non-EU jurisdiction. For full EU data residency the EU alternatives on this page usually offer more certainty.

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