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

eM Client: sovereignty score and 8 European alternatives

eM Client is an email, calendar and contacts client for Windows and macOS, with mobile apps for Android and iOS. It connects to existing accounts, including Gmail and Hotmail, and lists message encryption and translation among its features. The software is installed on the user's own device. Optional AI features can be connected to a custom AI provider, according to the vendor's description of the product.

eM Client s.r.o. is a Czech company with its registered seat in Prague. Its privacy policy says that eM Sync data is stored on servers hosted by Microsoft Azure, and that data may be transferred to and processed in the United States, with reliance on the EU-U.S. Data Privacy Framework. The company states that it has a data processing agreement with each processor of personal data. The client itself runs on the user's device, but the sync and AI services determine where data is processed.

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Sovereignty score
78 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-2100
    Headquartered in the EU: European law applies
  • Data residency SOV-3100
    Hosting inside and outside Europe (EU, US)
  • Cryptographic key sovereignty SOV-380
    Closed source, but self-hostable: encryption keys and runtime under your own control
  • Freedom from lock-in SOV-640
    Closed source: switching requires data migration
  • Source & runtime sovereignty SOV-4 · SOV-670
    Closed source, but self-hostable on your own infrastructure

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 11, 2026
HeadquartersCZ (EU)Verified by hand
Data hostingSelf-hosted, e.g. in EU, US (your choice)Verified by hand
Open-sourceNoVerified by hand
GDPR-compliantYesVendor-stated
CategoryBusiness Email & Groupware
TypeProduct
Websiteemclient.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to eM Client

The European alternatives to eM Client come from our knowledge base of over 6,200 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 eM Client

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

eM Client runs on infrastructure you choose and control yourself. You decide where the data lives, including fully within the EU if you want — this is not a fixed hosting choice made by the vendor.

eM Client is closed source, but you run the software yourself on your own infrastructure. The encryption keys and the runtime therefore stay under your own control, though you cannot audit or modify the source code. Ask about export options and open standards to limit software-level lock-in.

What this means for your organisation depends on your whole stack and context. The free assessment weighs eM Client 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 eM Client?

It depends on your use case. Strong EU alternatives to eM Client 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 eM Client?

Yes. Open-source EU alternatives to eM Client 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 eM Client GDPR-compliant and where is the data hosted?

eM Client is headquartered in CZ (EU) and hosts data in EU, US. That makes eM Client 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 11, 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 eM Client — GDPR-compliant & EU-hosted · EU Sovereignty Score