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Hey, I'm Lumo

The AI that respects your privacy

An AI assistant should empower you, not exploit you for your data. That's why we built Lumo: To bring you all the benefits of AI, without compromising your privacy and data security.

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Lumo requires JavaScript to run. Please enable JavaScript in your browser settings to access the full Lumo experience.

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🔒Your chats are yours alone

We keep no logs of what you ask, or what Lumo replies. Your chats can't be seen, shared, or used to profile you. Lumo saves nothing on our servers.

🔐Only you have access

Thanks to zero-access encryption, your saved conversations can only be decoded and read on your device. Neither Proton nor anyone else can see them.

🔍Tech that you can trust

Lumo's code is fully open source, so anyone can independently verify that it's private and secure—and that we never use your data to train the model.

⚙️You're in control

Your data isn't shared with advertisers, governments, or anyone else. Lumo is a European service subject to GDPR, so you can delete your data anytime.

Built by the team that knows privacy

AIs from Big Tech are built on harvesting your data. But Lumo is different. It was created by the scientists behind innovative, privacy-first services like Proton Mail and Proton VPN. And it's owned by a Swiss nonprofit, whose mission is to advance privacy and never make money from user data.