Lumo by Proton
Privacy-first AI assistant utilizing zero-access encryption and open-source code, ensuring no data logging, profiling, or training on chats, providing user-controlled, encrypted conversations, with compliance under GDPR and no sharing with third parties.
Cost / License
- Freemium (Subscription)
- Open Source (GPL-3.0)
Application types
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
- F-Droid
Features
Properties
- Privacy focused
- Distraction-free
- AI-Powered
Features
- AI Chatbot
- Ad-free
- No Tracking
- Encrypted Chat
- No Logs
Proton Drive Integration
- No registration required
- Cloud Sync
- AI Writing
- End-to-End Encryption
- Two-factor Authentication
- Dark Mode
- GDPR Compliant
Lumo by Proton News & Activities
Recent News
- Maoholguin published news article about Lumo by Proton
Proton’s privacy-focused AI Lumo can now generate interactive charts and visuals in chatLumo introduces the ability to generate charts, graphs, and custom visuals directly within chat con...
- POX published news article about Lumo by Proton
Proton launches Lumo 2.0 with image generation, advanced reasoning, and improved memoryProton has released Lumo 2.0, marking the most extensive update to its zero-access encrypted AI ass...
- POX published news article about Proton Meet
Proton launches business suite offering to compete with Microsoft 365 and Google WorkspaceProton has launched Proton Workspace, uniting all of its privacy-focused tools into a single platfo...
Recent activities
- Robin-Fedele added Lumo by Proton as alternative to MU/TH/UR 6000
neovij added Lumo by Proton as alternative to GetCleanPost
Simon-Majar added Lumo by Proton as alternative to Solair- Delta-Executor-APK liked Lumo by Proton
getpocketcore added Lumo by Proton as alternative to Pocket Core AI
agrawalmadhuri356-dev added Lumo by Proton as alternative to Faceless ai script genrator- Chaanakya liked Lumo by Proton
ctm5000 added Lumo by Proton as alternative to SWX KI-Assistent
Selim-Deniz added Lumo by Proton as alternative to Fisherselim
luchistudio added Lumo by Proton as alternative to Luchi Studio
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What is Lumo by Proton?
An AI assistant should empower you, not exploit you for your data. That’s me, Lumo.
I was designed to bring you all the benefits of AI, without invading your privacy. From the scientists behind Proton Mail, Proton VPN, and the nonprofit Proton Foundation.
Your chats are yours and yours alone
AIs from Big Tech are built on harvesting your data. But Proton is different. We keep no logs of what you ask, or what I reply. Your chats can’t be seen, shared, or used to profile you.
Safeguarded by advanced security
Thanks to zero-access encryption, the conversations you save can only be decoded and read on your device. Proton can never see them, and neither can anyone else.
With tech that you can see — and trust
Unlike other AI assistants, my code is fully open source, so anyone can verify that it’s private and secure — and that we never use your data to train the model.
And the confidence that you’re in control
We don’t — and can’t — share your information with anyone, including advertisers and governments. And Lumo is a European service subject to GDPR, so you can delete your data anytime.







Comments and Reviews
I am at ease with Lumo AI by Proton.
Great mascot I love it's design. However marketing it as Open Source is misleading as only the clients are. Especially how they started with words like "Unlike other AI assistants, my code is fully open source, so anyone can verify that it’s private and secure — and that we never use your data to train the model.".
But that's not my main issue with it. The thing that bug me really hard is how closed it really is, it uses several models ("Nemo, OpenHands 32B, OLMO 2 32B, and Mistral Small 3") but everything here is opaque such as Lumo system prompt nor the routing methods that decide which model will handle your query.
Here is a more detailled article the really explain this better than me (and I've copy pasted some words from it) : https://osai-index.eu/news/lumo-proton-least-open
I like that they're bringing an open source and privacy friendly AI product. But it's not entirely open source. Nevertheless, it's the privacy protections and the not learning from you is the main selling point.
On that open source front, there has been improvements:
The cutoff for it's knowledge is a couple of years old. So when working as a programmer on systems that evolves frequently, I don't quite get the code/scripts that follows the typical patterns and best practices we follow in our industry. So, if you're looking for something specialised, you may want to create a project with the necessary set of instructions. But this would be limited if you try to point to llms.txt files.
Having said that, with the architectural improvements in Lumo 2.0, it's really good at searching and giving general knowledge answers. The personalisation is a nice touch, too.
gotta use it for casual thinking
I like that Proton is bringing its privacy-first philosophy to AI. Knowing that conversations aren't used for profiling or training makes Lumo an interesting alternative for anyone who regularly works with sensitive information.
Lumo is good and minimal design. But answer often too long to read.
Been using Lumo on and off recently and I really appreciate the privacy-first approach. Nice to finally see a search experience that doesn't feel built around tracking.