Proton’s AI assistant, with zero-access encryption, which does not keep your conversations.
In practice
The vendor doesn’t publish a starting price on its pricing page: you have to ask. Lumo (Proton) offers a permanent free plan. We couldn’t verify whether the site is available in French. European hosting isn’t mentioned on the pages we checked; GDPR mention not verified.
Note
Usable for free; a free account raises the limits. Paid plan price not readable.
“Not verified”: information not found on the vendor’s website or pricing page, not necessarily false. Our method · Are you the vendor? Report an update
FAQ
Frequently asked questions
How much does Lumo (Proton) cost?
Lumo (Proton) doesn’t publish a starting price: you need to ask the vendor for a quote. Information checked on 19 Oct 2026.
Does Lumo (Proton) have a free plan?
Yes: Lumo (Proton) offers a permanent free plan, according to its pricing page.
Is Lumo (Proton) available in French?
Not verified: we couldn’t confirm a French version of Lumo (Proton)’s website.
Where is Lumo (Proton)’s data hosted?
Lumo (Proton) doesn’t clearly state where data is hosted on the pages we checked: ask the vendor. Vendor country: Switzerland.
What are the alternatives to Lumo (Proton)?
In the “General-purpose assistants” category, the tools that meet the most verified criteria are ChatGPT (agent mode), Claude and Gemini. The table at the bottom of the page compares all the alternatives.
Answers based solely on information published by the vendors and collected on 19 Oct 2026.
