Category: Business Email & Groupware
8 European alternatives to MailStore Server — GDPR-compliant & EU-hosted.
German enterprise standard for legally sound, GDPR-compliant email archiving, installable locally on your own infrastructure. Developed by MailStore Software GmbH, a subsidiary of Canadian OpenText since 2024.
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Facts
- Headquarters
- DE (EU)
- Ultimate parent company
- CA
- Sovereignty model
- Vendor-hosted (EU)
- Category
- Business Email & Groupware
- Type
- Product
- GDPR-compliant
- Yes
- Open-source
- No
- Data hosting
- EU
Sources
Public sources used in the latest check of this record.
- mailstore.com/en/products/mailstore-server/
- mailstore.com/en/blog/2019/02/13/mailstore-server-gdpr-certified/
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 MailStore Server
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) | Key management with a European vendor | 40 |
| Platform lock-in (PLS) | Closed source: switching requires data migration | 60 |
| Source & runtime sovereignty (SRS) | Closed source, runtime with the vendor | 45 |
| Average | 29 |
Why digital sovereignty matters with MailStore Server
MailStore Server is headquartered in DE 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 CA. Foreign control undermines part of the certainty a European headquarters offers.
Data is hosted exclusively in the EU, so MailStore Server scores best on data residency.
MailStore Server is closed source and hosted by the vendor. The encryption keys and the runtime sit with the vendor and switching requires data migration. Ask about bring-your-own-key, export options and open standards.
What this means for your organisation depends on your whole stack and context. The free assessment weighs MailStore Server together with your other vendors and gives a total score, a heatmap and the main risk drivers.
Top EU-based & GDPR-compliant alternatives to MailStore Server
The European alternatives to MailStore Server 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 MailStore Server?
It depends on your use case. Strong EU alternatives to MailStore Server 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 MailStore Server?
Yes. Open-source EU alternatives to MailStore Server 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 MailStore Server GDPR-compliant and where is the data hosted?
MailStore Server is headquartered in DE (EU) and hosts data in EU. That makes MailStore Server 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
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