Proton launches Lumo, a private AI assistant with encrypted chats and no-log policy
Proton has introduced Lumo, a private AI assistant engineered for confidential user interaction. Unlike other digital assistants, Lumo keeps all conversations end-to-end encrypted and stores no logs, ensuring conversations remain private and user data stays under individual control.
This privacy-first design enables users to summarize sensitive legal documents, ask private health questions, or rewrite personal emails without revealing personal information. Following Proton’s tradition, Lumo is integrated within the broader Proton privacy ecosystem — alongside products like Proton Mail, Proton Calendar, Proton VPN, Proton Drive, Proton Pass, and Proton Wallet.
Building on this integration, users can attach end-to-end encrypted files directly from Proton Drive when chatting with Lumo, maintaining privacy even in file uploads. Lumo is accessible for free online and on dedicated iOS and Android apps. While an account is not required, logging in allows access to secure chat history within the app. For those needing higher usage, Lumo Plus offers premium features and unlimited queries.
- AI Chatbot
- Freemium • Open Source
Related news
External links
- Introducing Lumo, the AI where every conversation is confidentialProton • Official source
- Proton's new privacy-first AI assistant encrypts all chats, keeps no logsTechCrunch
- Proton throws shade at Apple Intelligence privacy as it launches AI chatbot9to5Mac
- Lumo Is Proton's Privacy-First Alternative to ChatGPT and Other AI ChatbotsCNET
- Proton's New AI Assistant Lumo Offers Encrypted Chat AlternativeMacRumors
- Proton's privacy-focused Lumo chatbot encrypts all your conversationsEngadget
- Proton's New Lumo AI Chatbot Puts Privacy First With Its ChatGPT AlternativePCMAG
Comments
No drive linux cilent yet?
I feel Proton accepting the forced investor driven trend to be not a good sign they know what they are doing.
U pay 9.99 for a weak model but faster and unlimited replies No, thanks
A great public good, but as others commented, not a powerhouse AI product by any means. Still proud of them though! :)
I have yet to actually try it, but perhaps I believe what Proton and its guinnea pig users have to say about Lumo; it's private, it's encrypted chats, it's open models (Nemo, OpenHands 32B, OLMO 2 32B, and Mistral Small 3; according to the comments on the subreddit ), and (of course), it's from the reputable privacy company Proton. Still, it's very much not without its recent behavioral hiccups. Judging by how it's acting (still no Linux app for Drive, no F-Droid app for Mail, and let's not forget the CEO publicly showing support for Trump and the republicans... (Sorry, had to push that out there.)), I'm still quite doubtful about all of Proton in general.
That aside, Proton set a positive note near the end of its announcement... "Because of legal uncertainty around Swiss government proposals to introduce mass surveillance — proposals that have been outlawed in the EU — Proton is moving most of its physical infrastructure out of Switzerland. Lumo will be the first product to move."
And another thing. Might be just me personally but GAWD THAT ASSISTANT AVATAR IS SO CUTE. :3
I understand that now everybody has to do AI want it or not at least to a point to stay relevant among the hype, and also that there is actually a chance that it is the future so just in case, but I really really really whish that proton would focus more on polishing the existing services with so many open requests from the community, or that they made new products based on community suggestions, that are also numerous. Featurewise, I think duck.ai is way better overall, but being european is certainly an advantage for Lumo, and the privacy seems to be a bit tighter too. I have proton unlimited, and I don't know if I am supposed to have some features additional to free users, but it seems pretty plain. So now that they build it, I hope that they develop it and expand it before jumping onto the next thing.
They clarified on the Reddit post that Unlimited users will NOT get access to Lumo's Plus plan. Only Visionary and Lifetime plans have Lumo Plus included. So no, you, as an Unlimited subscriber, only get access to Lumo Free, the same plan that non-Unlimited users have without paying.
It's based on Mistral AI language model. I Thought they made their own. Also it seems like really weak compared to other chatbots
It's based on Mistral Nemo and Small 3, but also OLMO 2 and OpenHands (all open models), fitted by Proton for Lumo. Theses are pretty small but efficient models with many limitations, but since Lumo is free (or 13€/month), one cannot expect the same outputs as the $200-$300 a month models. And contrary to other AI companies, Proton Foundation cannot afford to burn dozen of billions dollars each year to train their models ;)