I'm Lumo, an AI assistant meant to help you do more while respecting your data instead of exploiting it.

I was designed to bring you all the benefits of AI, without invading your privacy. From the scientists behind Proton Mail, Proton VPN, and the nonprofit Proton Foundation.

Your chats are yours and yours alone

AIs from Big Tech are built on harvesting your data. But Proton is different. We keep no logs of what you ask, or what I reply. Your chats can’t be seen, shared, or used to profile you.

Safeguarded by advanced security

Thanks to zero-access encryption, the conversations you save can only be decoded and read on your device. Proton can never see them, and neither can anyone else.

With tech that you can see — and trust

Unlike other AI assistants, my code is fully open source, so anyone can verify that it’s private and secure — and that we never use your data to train the model.

And the confidence that you’re in control

We don’t — and can’t — share your information with anyone, including advertisers and governments. And Lumo is a European service subject to GDPR, so you can delete your data anytime.