Category: Business Email & Groupware

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

German open-source email and groupware platform for providers and companies

Visit website ↗Assessment

Facts

Headquarters: DE (EU)
Category: Business Email & Groupware
Type: Product
GDPR-compliant: Yes
Open-source: Yes
Data hosting: EU

Top EU-based & GDPR-compliant alternatives to Open-Xchange

Axigen
Romanian enterprise email server with webmail, calendar and instant messaging
RO · commercial
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EGroupware
German open-source groupware platform with email, CRM, project management and more
DE · open-source
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grommunio
Austrian open-source groupware platform as an alternative to Microsoft Exchange
AT · open-source
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Kolab
Swiss open-source groupware platform with email, calendar and file management
CH · open-source
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Kopano
Kopano Cloud is the proprietary successor to Kopano Groupware, which reached end-of-life on March 31, 2025. The open-source Kopano Groupware (AGPL) is no longer maintained; Kopano Cloud is available under a commercial/proprietary license only.
NL · commercial
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Mailcow
German open-source email server platform with Docker-based installation
DE · open-source
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Mailu
Open-source email server in Docker with webmail, anti-spam and antivirus protection
FR · open-source
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Roundcube
open-source webmail-client with modern interface and plugin-architecture
CH · open-source
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Frequently asked questions

What is the best European alternative to Open-Xchange?

It depends on your use case. Strong EU alternatives to Open-Xchange include Axigen, EGroupware and grommunio. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Open-Xchange?

Yes. Open-source EU alternatives to Open-Xchange include EGroupware, grommunio, Kolab, Mailcow, Mailu and Roundcube. These keep your data fully under your own control and let you self-host if you want to.

Is Open-Xchange GDPR-compliant and where is the data hosted?

Open-Xchange is headquartered in DE (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes Open-Xchange an EU-sovereign choice in its own right; the EU alternatives on this page are comparable European tools.

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