The company behind Proton VPN, Proton Mail and Proton Pass, has released an open-source AI chatbot that it says isn't trained on user data.

Proton isn’t involving major AI providers at all. Instead, Proton’s Lumo AI uses a mix of open-source models that the company runs on its own servers. While conversations aren’t end-to-end encrypted, Proton says it doesn’t keep logs of users’ chats, and conversations are decrypted only on users’ devices.

Proton says every conversation with Lumo is secured with zero-access encryption, meaning only your device can unlock your content. In the context of an AI chatbot, that has several implications. Most notably,