Lumo by Proton

Proton AG

In-app purchases

About this app

Ask anything. It’s confidential.

Meet Lumo, the privacy-first AI assistant created by Proton, the team behind encrypted email, VPN, password manager, and cloud storage trusted by over 100 million people.

Lumo helps you stay productive, curious, and informed — without ever compromising your privacy.

Start a confidential chat today.

Ratings and reviews

Won't accept image files. Try png, jpg, jpeg "Unsupported file type". The images open in any other app on the same device. Button icons could use work too, they're mostly intuitive but there are a couple that aren't fully obvious. What exactly does the globe button do, and why does it have a unique background? Is that the web search enabled button? If so, is it toggled on when the unique background is dark gray or light gray? Private AI sounds best, but pointless if lacking basic functionality.

Generally seems pretty good, and it appears that the team is making quick improvements. However the weekly prompt limit on the free tier isn't very generous. It would be great if there were additional tiers for existing proton subscribers to further try it, before adding another subscription... especially with other free semi-private options like duck.ai that don't appear to impose any limits.

Thank you for making Lumo. While i also am dissapointend regarding the quality like other people do, the fact that this is the only one who does not use "for training" and other excuses to collect our data makes this the best AI for me. Also for anyone saying about the other ai responding faster, i hope you realise that other ai who respondes fast is because they have not checked the information and are "showing off" even if they lie. Plus, their "free per day" is the best for complex stuff

What’s new

Paws what you’re doing and check out the latest Lumo Android upgrade—now it lands on its feet every time (stability that’s fur‑real) and finally understands your meows with purr‑fect speech‑to‑text. 😺📱✨