Lumo
Meet Lumo, the zero-access encrypted AI assistant by Proton that does not track or record your conversations. Ask me anything — it's confidential.
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What is Lumo?
Lumo is a privacy-first AI assistant developed by Proton that prioritizes data security through zero-access encryption and a strict no-logs policy. It allows users to leverage AI capabilities—including document analysis and image generation—without compromising their personal data or having it used for model training.
Lumo pricing
Pricing model: Freemium
Free tier available; Lumo Plus costs $12.99/month (or $9.99/month billed annually)
Lumo pros
- Zero-access encryption ensures only you can read your conversations
- Strict no-logs policy and never uses your data to train AI models
- Open-source client code allows for independent security verification
- Ghost Mode feature instantly deletes conversations when the chat is closed
Lumo cons
- Open-weight models may lag behind top-tier frontier models in complex coding and advanced reasoning
- Lacks a native desktop application, requiring users to rely on browser access
- Smaller integration ecosystem and fewer third-party plugins compared to mainstream AI assistants
Frequently asked questions about Lumo
Does Lumo use my data to train its models?
No, Lumo never uses your data or conversations to train its AI models.
Can Proton or third parties read my chats?
No, Lumo uses zero-access encryption, meaning conversations can only be decrypted on your device and are not accessible to Proton or anyone else.
What AI models power Lumo?
Lumo is powered by open-weight models hosted on Proton's own secure servers in Europe.