Anyone who’s interested in security and uses open-source applications has probably heard of at least one Proton product, whether it’s Proton Mail, Proton VPN, Proton Wallet, Proton Authenticator, or Proton Drive. Proton’s agenda has always been clear: make the internet more private and give users greater freedom. In July 2025, Proton launched Lumo, a privacy-focused AI assistant. Recently, Proton updated it and renamed it Lumo AI, so it's now Lumo AI 2.0.
We’ve all been telling our AI assistants things we’d avoid telling anyone else for years now. But have you ever noticed that after discussing a business idea or planning to buy something on your wishlist with an AI assistant, you suddenly start seeing relevant ads on websites and related content on social media? Why does that happen? Because many AI assistants can access our data and may share or sell it. That's where Proton wanted to draw the line and describes Lumo AI as a zero-access encrypted AI assistant that never logs our chats or trains on our data.
If you’ve used ChatGPT or another AI assistant, Lumo AI will feel like home, and it won’t take long to figure things out. Its interface is familiar, its mascot is cute, and its branding feels warm and welcoming. However, that can’t be the sole reason to switch to any AI assistant. Lumo AI is free to use and also offers Lumo Plus, which costs $9.99 per month and comes with some additional benefits.
I would advise you to use the free account initially unless you plan to switch permanently and decide to purchase the Lumo Plus package.
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