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The maker of ProtonMail and ProtonVPN says its second-generation chatbot is never trained on user data.
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Proton, best known for its ProtonMailVPN and encrypted email service ProtonMail, has announced Lumo 2.0, the second iteration of its 'privacy-first' AI chatbot, featuring "the most significant change since launch."
First announced in 2025, Lumo arrived as a privacy-preserving alternative to popular AI models such as OpenAI's ChatGPT and Anthropic's Claude. While able to perform many of the same tasks -- answering user queries, searching the web, generating content including text and images, and analyzing uploaded files -- Proton emphasizes security and privacy features that other AI models don't prioritize.
Also: Privacy in the AI era is possible, says Proton's CEO, but one thing keeps him up at night