EU Sovereignty Score
Self-hosted / open sourceBusiness Email & GroupwareHeadquarters: DE

Mailcow: sovereignty score and 8 European alternatives

mailcow: dockerized is a self-hosted mail server suite for organisations and individuals who want to run their own email. It combines established open-source components in separate Docker containers: Postfix for SMTP, Dovecot for IMAP and POP, Rspamd for spam filtering, optional ClamAV antivirus, and SOGo for webmail with calendar and contacts over CalDAV and CardDAV. A web interface manages domains, mailboxes, DKIM keys, quarantine and two-factor authentication. It is installed with Docker Compose on a server of your own.

The project is managed and maintained by The Infrastructure Company GmbH in Willich, Germany, with contributions from the community. mailcow itself is released under the GNU General Public License version 3, so the code can be inspected and no vendor-hosted service is required. Because you operate the server yourself, mail and user data stay on infrastructure of your choice, for example a data centre in the EU. Paid support is available through Servercow. Operations, updates and backups remain your own responsibility.

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Sovereignty score
94 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-2100
    Headquartered in the EU: European law applies
  • Data residency SOV-3100
    EU-only hosting
  • Cryptographic key sovereignty SOV-390
    Self-hostable: encryption keys under your own control
  • Freedom from lock-in SOV-680
    Open source: low switching costs
  • Source & runtime sovereignty SOV-4 · SOV-6100
    Source code auditable, forkable and self-hostable

SOV codes: the matching objective in the European Commission's Cloud Sovereignty Framework. Official source

How the score is calculated

Facts and evidence

Last checked July 2, 2026
Headquarters
DE (EU)Verified by hand
Sovereignty model
Open-source, distributedVerified by hand
Data hosting
EUVerified by hand
Open-source
YesVerified by hand
GDPR-compliant
YesVendor-stated
Hosting signal
FASTLY - Fastly, Inc., US (US)Technically measured
Category
Business Email & Groupware
Type
Product
Website
mailcow.email ↗

The hosting signal shows the network that serves the vendor's website, often a CDN, and not necessarily where the service or your data is hosted. How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Mailcow

The European alternatives to Mailcow come from our knowledge base of over 6,800 vendors. We only list vendors headquartered in the EU or the EEA; fully European-owned vendors rank before vendors with a foreign owner. For each alternative you see the country, the open-source status and a short description.

Score per alternative: 0 = high exposure, 100 = sovereign

28 European Business Email & Groupware vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

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Why digital sovereignty matters with Mailcow

Mailcow is headquartered in DE and therefore falls under European law: the GDPR, NIS2 and the Data Act. No foreign legislation can compel access to your data.

Data is hosted exclusively in the EU, so Mailcow scores best on data residency.

Mailcow is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Mailcow together with your other vendors and gives a total score, a heatmap and the main risk drivers.

Frequently asked questions

What is the best European alternative to Mailcow?

It depends on your use case. Strong EU alternatives to Mailcow include Axigen, Benno MailArchiv and BlueMind. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Mailcow?

Yes. Open-source EU alternatives to Mailcow include Benno MailArchiv, CipherMail, Dovecot and EGroupware. These keep your data fully under your own control and let you self-host if you want to.

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

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

Details and sources

Verified by handHeadquarters, owner, hosting locations and licence have been checked by us against public sources. Free of charge and for every vendor, not a paid label. Nothing in this knowledge base is taken over automatically. Last checked on July 2, 2026.

Sources

This record was checked via the vendor's website and legal notice during the full audit of June and July 2026. Source links have been recorded per record since 20 September 2026.

Compliance evidence

The links below point to the vendor's own public documents. We only record what we found: a missing link means "not found publicly", not "not compliant".

No public compliance evidence has been recorded for this vendor yet. Do you know its DPA or subprocessor list? Something wrong? Suggest a correction

Digital sovereignty in Business Email & Groupware

Business Email & Groupware: Business email servers, groupware, calendar and contact management. In this category the choice of vendor determines who has legal access to your data, where that data lives and how easily you can switch later.

Also in this category

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8 European alternatives to Mailcow — GDPR-compliant & EU-hosted · EU Sovereignty Score