EU sovereignAIHeadquarters: CH

Proton Lumo: sovereignty score and 8 European alternatives

Lumo is the AI assistant from Proton AG, the Swiss company behind Proton Mail, Proton VPN and Proton Drive. With Lumo you can summarise documents, generate code and draft text. The assistant is available as a web application and as apps for iOS and Android. You can start without an account; a Proton account syncs saved conversations across devices. Lumo is based on open-source language models.

Proton AG is headquartered in Switzerland. According to Proton, the models run exclusively on servers that Proton controls, in Europe, and queries are not sent to third parties. Saved chats use zero-access encryption, so only you can read them, and Proton states that it keeps no logs of prompts or responses and does not use conversations to train models. The code of the web and mobile apps is open source (GPLv3); the server code is not. For a European organisation this means a Swiss provider with no foreign parent company and processing in Europe; exact datacentre locations may change as Proton moves infrastructure.

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Sovereignty score

71 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-2100
Headquartered in Switzerland: Swiss law, recognised by the EU as adequate
Data residency SOV-3100
EU-only hosting
Cryptographic key sovereignty SOV-360
Key management with a European vendor
Freedom from lock-in SOV-640
Closed source: switching requires data migration
Source & runtime sovereignty SOV-4 · SOV-655
Closed source, runtime with the vendor

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 July 2, 2026

Headquarters	CH (EU)Verified by hand
Sovereignty model	Vendor-hosted (EU)Verified by hand
Data hosting	EUVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Compliance documents	1 published, see belowVendor-stated
Hosting signal	PROTON - Proton AG, CH (CH)Technically measured
Category	AI
Type	Product
Website	lumo.proton.me ↗

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 Proton Lumo

The European alternatives to Proton Lumo 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

56 European AI 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 Proton Lumo

Proton Lumo is headquartered in Switzerland and falls under Swiss law, including the revised Swiss data protection act. Switzerland is not an EU member, but the European Commission recognises its level of data protection as adequate. Its Swiss headquarters does not by itself bring it under US legislation such as the CLOUD Act.

Data is hosted exclusively in the EU, so Proton Lumo scores best on data residency.

Proton Lumo 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 Proton Lumo 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 Proton Lumo?

It depends on your use case. Strong EU alternatives to Proton Lumo include Aleph Alpha, Almato and Almawave. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Proton Lumo?

Our list of EU alternatives to Proton Lumo is mostly commercial options. Browse the category on the map for open-source choices.

Is Proton Lumo GDPR-compliant and where is the data hosted?

Proton Lumo is headquartered in CH (EFTA) and hosts data in EU. That makes Proton Lumo 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 July 2, 2026.

Sources

This record was checked via the vendor's website and legal notice during the full audit of June and July 2026. Source links have been recorded per record since 20 September 2026.

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".

Data Processing Agreement (DPA): proton.me/legal/privacy

Provenance of the links above:Vendor-stated

Links checked on September 21, 2026.

Digital sovereignty in AI

AI: Artificial intelligence — large language models, translation, generative AI. 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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