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

SOGo: sovereignty score and 8 European alternatives

SOGo is a groupware server built on open standards and designed for scalability. It gives users a browser-based interface for email, calendars and address books, and supports native clients through CalDAV, CardDAV, GroupDAV and Microsoft ActiveSync, so phones can sync mail, contacts, events and tasks. SOGo integrates with directory and storage back ends such as Active Directory, OpenLDAP, SQL and IMAP, and supports single sign-on through CAS, WebAuth or Kerberos. It is installed on an organisation's own servers.

SOGo is open source, released under the GPL and LGPL. Development was taken over around 2006 by Inverse of Montreal, Canada. Since May 2022 Alinto, an email service provider based in Lyon, France, has been its commercial steward, offering professional support and a cloud version under the Sogomail brand. Because the software runs on your own infrastructure, an organisation chooses where data is stored and who administers it, and community support and paid support are both available.

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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 October 9, 2026
Headquarters
FR (EU)Verified by hand
Sovereignty model
Open-source, distributedVerified by hand
Data hosting
EUVerified by hand
Open-source
YesVerified by hand
GDPR-compliant
YesVendor-stated
Hosting signal
ALINTO - Alinto Group SAS, FR (FR)Technically measured
Category
Business Email & Groupware
Type
Product
Website
sogo.nu ↗

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 SOGo

The European alternatives to SOGo come from our knowledge base of over 6,800 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 SOGo

SOGo 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 SOGo scores best on data residency.

SOGo 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 SOGo 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 SOGo?

It depends on your use case. Strong EU alternatives to SOGo include EGroupware, Kolab and Kopano. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to SOGo?

Yes. Open-source EU alternatives to SOGo include EGroupware, Kolab, Mailcow, Mailu, Open-Xchange, Roundcube and grommunio. These keep your data fully under your own control and let you self-host if you want to.

Is SOGo GDPR-compliant and where is the data hosted?

SOGo is headquartered in FR (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes SOGo 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 9, 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.

Also in this category

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8 European alternatives to SOGo — GDPR-compliant & EU-hosted · EU Sovereignty Score