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Lumo

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About the brand ❤️

Lumo is a privacy-first AI chatbot launched in July 2025 by Proton AG, the Swiss company known for encrypted services like Proton Mail and Proton VPN. Designed as an assistant that “doesn’t spy,” Lumo operates under a “zero-access encryption” model: conversations are encrypted, no logs are stored on servers, and Proton claims it does not use user conversations to train models. Its architecture is built with open-source language models, deployed across European data centers (notably Germany and Norway) to maintain data jurisdiction and privacy compliance. Lumo offers typical chatbot capabilities like summarizing documents, drafting emails, code generation, and analyzing uploaded files — with web search functionality disabled by default to enhance privacy. As of now, Lumo is active and continues to expand its feature set under Proton’s privacy-centric ethos.

Founded: 2025

Headquarters: Route de la Galaise 32, 1228 Plan-les-Ouates, Geneva (Geneva canton), Switzerland

Owner: Proton AG

https://lumo.proton.me/