Category: Business Email & Groupware
8 European alternatives to Radicale — GDPR-compliant & EU-hosted.
Lightweight open-source CalDAV and CardDAV server (calendar and contacts, GPLv3), ideal for decoupling from Google/Apple cloud sync. Originated at French web consultancy Kozea; no controlling company in the classic sense, community-maintained.
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Facts
- Headquarters
- FR (EU)
- Sovereignty model
- Open-source, distributed
- Category
- Business Email & Groupware
- Type
- Product
- GDPR-compliant
- Yes
- Open-source
- Yes
- Data hosting
- EU
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
Sovereignty profile of Radicale
How this vendor scores on the five dimensions of the Digital Sovereignty Heatmap: 0 is sovereign, 100 is high exposure. These are the same scores the assessment uses.
| Jurisdictional exposure (JES) | Headquartered in the EU: European law applies | 0 |
|---|---|---|
| Data residency (DRS) | EU-only hosting | 0 |
| Cryptographic key sovereignty (CKS) | Self-hostable: encryption keys under your own control | 10 |
| Platform lock-in (PLS) | Open source: low switching costs | 20 |
| Source & runtime sovereignty (SRS) | Source code auditable, forkable and self-hostable | 0 |
| Average | 6 |
Why digital sovereignty matters with Radicale
Radicale is headquartered in FR 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 Radicale scores best on data residency.
Radicale 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 Radicale together with your other vendors and gives a total score, a heatmap and the main risk drivers.
Top EU-based & GDPR-compliant alternatives to Radicale
The European alternatives to Radicale come from our knowledge base of over 3,600 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.
- Benno MailArchiv↗
German, audit-proof enterprise email archiving system for GDPR/GoBD-compliant storage of millions of emails, integrable with any email/groupware system. Developed by LWsystems GmbH (Bad Iburg); core and web app under AGPLv3, some modules proprietary.
DE · open-source
- CipherMail↗
Amsterdam-developed open-source email encryption gateway that centrally enforces S/MIME, PGP and PDF encryption for all outgoing organisational traffic, acting as a mail proxy between the firewall and internal mail server.
NL · open-source
- EGroupware↗
German open-source groupware platform with email, CRM, project management and more
DE · open-source
Frequently asked questions
What is the best European alternative to Radicale?
It depends on your use case. Strong EU alternatives to Radicale include Axigen, Benno MailArchiv and CipherMail. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.
Are there open-source alternatives to Radicale?
Yes. Open-source EU alternatives to Radicale include Benno MailArchiv, CipherMail, Dovecot, EGroupware, grommunio and Kolab. These keep your data fully under your own control and let you self-host if you want to.
Is Radicale GDPR-compliant and where is the data hosted?
Radicale is headquartered in FR (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes Radicale an EU-sovereign choice in its own right; the EU alternatives on this page are comparable European tools.
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
How sovereign is your whole stack?
Start with Radicale and add the rest of your software. You immediately see the score, the heatmap and the European alternatives.
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