Self-hosted / open sourceDesktop OSHeadquarters: US

CalyxOS: sovereignty score and 8 European alternatives

CalyxOS is an Android-based operating system for everyday users who want more privacy and security. It runs on a list of supported Pixel, Fairphone and Motorola phones and tablets. Built-in features include Signal for messaging and calls, the Tor Browser, and F-Droid and Aurora Store as app sources. microG is offered as an optional replacement for some Google Play Services functions. The project draws heavily on the Android Open Source Project and on LineageOS code.

CalyxOS is developed by the Calyx Institute, a non-profit organisation in New York, so the developer is based in the United States. The privacy policy states that membership data is stored in encrypted form on the Vultr cloud platform, and it does not name a data-centre region. The project paused development in 2025 after its founder and tech lead left, and it has since published new Android releases in 2026. The system is described as mostly free and open-source software, and the policy does not refer to the GDPR.

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Sovereignty score

69 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-210
Headquartered in the US: CLOUD Act and FISA 702
Data residency SOV-3100
No hosting in Europe (US)
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-665
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 12, 2026

Headquarters	US (US)Verified by hand
EU adequacy decision	Only for companies individually certified under the EU-US Data Privacy FrameworkVerified by hand
Sovereignty model	Open-source, distributedVerified by hand
Data hosting	USVerified by hand
Open-source	YesVerified by hand
GDPR-compliant	NoVendor-stated
Category	Desktop OS
Type	Product
Website	calyxos.org ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to CalyxOS

The European alternatives to CalyxOS come from our knowledge base of over 8,000 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

26 European Desktop OS 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 CalyxOS

CalyxOS 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.

CalyxOS hosts data outside the EU (US). Personal data therefore leaves the EU, which requires a transfer mechanism under the GDPR and pulls the data residency score down.

CalyxOS 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 CalyxOS 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 CalyxOS?

It depends on your use case. Strong EU alternatives to CalyxOS include Alpine Linux, Armbian and Devuan. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to CalyxOS?

Yes. Open-source EU alternatives to CalyxOS include Alpine Linux, Armbian, Devuan, /e/OS, EndeavourOS, iodéOS, KDE neon and KDE Plasma. These keep your data fully under your own control and let you self-host if you want to.

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

CalyxOS is headquartered in US and hosts data in US. Its GDPR compliance is limited or unclear. For full EU data residency the EU alternatives on this page usually offer more certainty.

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 12, 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

Cyber Resilience Act

Public signals that relate to the EU Cyber Resilience Act. They do not count towards the score. A missing line means "not found publicly".

We found none of these signals on the vendor's own site when we checked.

For products in scope of the CRA, CE marking is required from 11 December 2027; this cannot be checked yet.

Checked on October 12, 2026. What is the Cyber Resilience Act?

Digital sovereignty in Desktop OS

Desktop OS: Desktop operating system — daily work platform. 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.

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