Category: Business Email & Groupware
8 European alternatives to Cyrus IMAP — GDPR-compliant & EU-hosted.
Robust, community-maintained enterprise mail and calendar server, suited to organisations with tens of thousands of concurrent users. Originally Carnegie Mellon University (US, 1993); now governed by an independent, mainly US-based governance board, no controlling company.
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Facts
- Headquarters
- US (US)
- EU adequacy decision
- Only for companies individually certified under the EU-US Data Privacy Framework
- 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 Cyrus IMAP
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 US: CLOUD Act and FISA 702 | 90 |
|---|---|---|
| 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 | 25 |
| Average | 29 |
Why digital sovereignty matters with Cyrus IMAP
Cyrus IMAP is headquartered in the United States. US vendors fall under the CLOUD Act and FISA 702: US authorities can compel access to data, even when that data sits in a European data centre. That is the core of the jurisdictional exposure in our model.
Data is hosted exclusively in the EU, so Cyrus IMAP scores best on data residency.
Cyrus IMAP 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 Cyrus IMAP together with your other vendors and gives a total score, a heatmap and the main risk drivers.
Top EU-based & GDPR-compliant alternatives to Cyrus IMAP
The European alternatives to Cyrus IMAP 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 Cyrus IMAP?
It depends on your use case. Strong EU alternatives to Cyrus IMAP 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 Cyrus IMAP?
Yes. Open-source EU alternatives to Cyrus IMAP 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 Cyrus IMAP GDPR-compliant and where is the data hosted?
Cyrus IMAP is headquartered in US and hosts data in EU. The vendor states it is GDPR-compliant, but the data falls under non-EU jurisdiction. For full EU data residency the EU alternatives on this page usually offer more certainty.
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?
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