Lumo by Proton

In-app purchases
4.7
251 reviews
10K+
Downloads
Content rating
PEGI 3
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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.
Updated on
25 June 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, App activity and App info and performance
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.7
238 reviews
Lexi Willis
23 July 2025
It's okay but I'm somewhat disappointed that this is just a frame of the web version. It can't generate images and you can't directly send photos from your camera without going into your camera app, taking a photo, opening Lumo again, opening the selection menu, and finding the photo. Right now it's very barebones and I wouldn't recommend it. Please Proton, make this review outdated.
1 person found this review helpful
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Proton AG
24 July 2025
Thank you for your review. Lumo’s capabilities are currently focused on text-based files, although we’re working on the ability to upload and analyze more file types, such as photos, in the future. Make sure to follow our blog (https://proton.me/blog) and our direct channels for any news and updates.
Edwin Joju
23 July 2025
As a continous Proton user, I appreciate the clean UI and thoughtful, clear replies in Lumo—it’s a well-built app. However, the icon and branding feel disconnected from the rest of the Proton suite (Mail, Drive, VPN, Pass), making it seem like a separate product. A more consistent icon or visual cue would help users instantly recognize it as part of the Proton family and strengthen brand identity. Keep up the great work—big fan of what Proton represents!
3 people found this review helpful
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Proton AG
24 July 2025
Thank you for your review. We've made sure to share your feedback regarding Lumo's design with the team accordingly. If you happen to have any other suggestions on how we can further improve the app, feel free to let us know at https://proton.me/support/contact. We always appreciate our community's input.
Jadzy Timosa
24 July 2025
The Lumo app UI is good but it needs fix and improvements. Adding a dark mode would be good, and including an option to toggle auto-scroll on or off in chats would be helpful for slow focused readers like me. These changes could make the app more comfortable and intuitive to use.
Did you find this helpful?
Proton AG
25 July 2025
Thank you for your review. Dark mode is planned, so make sure to follow our blog (https://proton.me/blog) and our direct channels for any news and updates on this. As for an auto-scroll option, we've shared your feedback with the team for future consideration.