EU Sovereignty Score
Self-hosted / open sourceEmail (Personal)Headquarters: EU

Roundcube (self-host): sovereignty score and 8 European alternatives

Roundcube Webmail is a browser-based, multilingual IMAP client with an application-like interface. It offers MIME support, an address book with groups and LDAP connectors, folder management, message search, spell checking, threaded message lists, shared IMAP folders with access control, and support for PGP. A plug-in API and skins allow the software to be extended and customised. Roundcube is self-hosted: you download a release or use a Docker image, connect an IMAP server and a database, and provide webmail to your users.

Roundcube is open source under the GPL (version 3 or later). Since November 2023 the project has been part of Nextcloud, a German company, and since August 2024 Nextcloud has also offered commercial support for mail providers under the name Roundcube Enterprise. Because you run the software yourself, you decide where the email data is kept: Roundcube is only the web client in front of your own mail server. This allows an organisation to offer webmail inside the EU without depending on a hosted provider.

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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
HeadquartersEU (EU)Verified by hand
Ultimate parent companyDEVerified by hand
EU adequacy decisionNo — no adequacy decisionVerified by hand
Sovereignty modelOpen-source, distributedVerified by hand
Data hostingEUVerified by hand
Open-sourceYesVerified by hand
GDPR-compliantYesVendor-stated
Hosting signalCLOUDFLARENET - Cloudflare, Inc., US (US)Technically measured
CategoryEmail (Personal)
TypeProduct
Websiteroundcube.net ↗

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 Roundcube (self-host)

The European alternatives to Roundcube (self-host) 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

30 European Email (Personal) 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 Roundcube (self-host)

Roundcube (self-host) is headquartered in EU 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 DE, also within Europe.

Data is hosted exclusively in the EU, so Roundcube (self-host) scores best on data residency.

Roundcube (self-host) 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 Roundcube (self-host) 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 Roundcube (self-host)?

It depends on your use case. Strong EU alternatives to Roundcube (self-host) include Bluewin Mail, CounterMail and Disroot. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Roundcube (self-host)?

Yes. Open-source EU alternatives to Roundcube (self-host) include Disroot. These keep your data fully under your own control and let you self-host if you want to.

Is Roundcube (self-host) GDPR-compliant and where is the data hosted?

Roundcube (self-host) is headquartered in EU (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes Roundcube (self-host) 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 Email (Personal)

Email (Personal): Personal email services — inbox, calendar, contacts. 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 Roundcube (self-host) — GDPR-compliant & EU-hosted · EU Sovereignty Score