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

WildDuck: sovereignty score and 8 European alternatives

WildDuck is an open-source mail server for IMAP and POP3 that is scalable and has no single point of failure. All data, including email, is kept in a distributed MongoDB database with sharding and replication. Its product design follows that of Gmail. Accounts, mailboxes and messages are managed through a REST API with an OpenAPI specification. WildDuck is part of the Zone Mail Suite and is combined with an SMTP server for inbound and outbound mail, such as ZoneMTA. It is aimed at providers and organisations that run their own mail platform instead of subscribing to Microsoft 365 or Google Workspace.

WildDuck is developed by Zone Media OÜ in Tallinn, Estonia, and released under the European Union Public Licence (EUPL) 1.2 or later. Zone Media has been owned by the Dutch Your.Online group since July 2026. The software is installed on your own infrastructure. The organisation decides where mailboxes are stored and how backups and access are managed.

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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 October 12, 2026
Headquarters
EE (EU)Verified by hand
Ultimate parent company
NLVerified by hand
Sovereignty model
Open-source, distributedVerified by hand
Data hosting
EUVerified by hand
Open-source
YesVerified by hand
GDPR-compliant
NoVendor-stated
Category
Business Email & Groupware
Type
Product
Website
wildduck.email ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to WildDuck

The European alternatives to WildDuck come from our knowledge base of over 7,800 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

36 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 WildDuck

WildDuck is headquartered in EE and therefore falls under European law: the GDPR, NIS2 and the Data Act. No foreign legislation can compel access to your data. The ultimate owner is based in NL, also within Europe.

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

WildDuck 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 WildDuck 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 WildDuck?

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

Are there open-source alternatives to WildDuck?

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

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

WildDuck is headquartered in EE (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes WildDuck 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 October 12, 2026.

Sources

Public sources used in the latest check of this record.

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.

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