Lumo by Proton

In-app purchases
4.7
278 reviews
10K+
Downloads
Content rating
PEGI 3
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

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 Jun 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
263 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 Please Proton, make this review outdated.
2 people found this review helpful
Did you find this helpful?
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.
Gus P
25 July 2025
Good start. Coming from Google's Gemini, this is nowhere close. Doesn't talk to you with voice. The responses are fairly rudimentary. Doesn't really search the web well for complex questions. Like I asked it to tell me about Euro Basket 2025 and it could not, asked me to search web. But I like the privacy feature and I'm a big Proton fan. So I'll give it 4 stars even though it's probably worth lower hoping that they really really improve the AI models, add text to speech (Lumo talks to me).
1 person found this review helpful
Did you find this helpful?
Proton AG
27 July 2025
Thank you for your review. We have shared your feedback with the team for future consideration. Meanwhile, you can use the thumbs down button located under the response to share your input with us regarding any inadequate responses. Our team is looking into these reports in order to further improve the quality of the answers in the future.
Harry Balls
25 July 2025
Poor AI compared to the competition. Slower, less effective, more dumb. After being told off for missing out half the European countries when asking for a comparison across the continent, it then continued to make the same mistake. I love Proton's mission but this AI has a long way to go before it's anywhere near ChatGPT/Grok etc.
Did you find this helpful?