Lumo helps you stay productive and private. As a privacy-first AI assistant, Lumo protects you with Proton's no-logs policy and zero-access encryption.

Get support for all of Proton's secure services, including free encrypted email, calendar, and drive. Find answers to your questions here or contact support.

A private AI assistant by Proton

Lumo helps your business boost productivity while keeping your sensitive data private and compliant. Learn more.

AI chatbots like ChatGPT have made quiet a splash. Companies are tripping all over themselves in a rush to add “AI” to everything, heedless...

Find out why Proton Lumo earned a special mention on TIME's list of 2025's best inventions.

See what’s new in the redesigned Proton Mail app for iOS and Android. Enjoy offline mode and a smoother experience on both platforms.

Make a cameo appearance in someone else’s AI video.

Lumo gives you the power to solve problems big and small, while keeping your personal data confidential. Try it now.

Lumo by Proton is designed to protect your data. Learn more about our no-logs policy, zero-access encryption, and other safeguards.

Lumo by Proton is designed to protect your data. Learn more about our no-logs policy, zero-access encryption, and other safeguards.