Proton Launches Lumo: A Privacy-First AI Assistant with End-to-End Encryption

Proton Introduces Lumo—A Secure AI Assistant Prioritizing User Privacy

Leading privacy-focused technology company Proton has just unveiled Lumo, its innovative AI assistant built with a strong commitment to safeguarding user data. Lumo stands out in the crowded world of artificial intelligence by offering powerful productivity features while maintaining the highest standards of privacy.

Key Features: Encryption, No Logging, and More

Lumo is designed to ensure that no user conversations are ever stored or logged on any server. All messages are safeguarded with end-to-end encryption, meaning only the intended recipient can access the content. For users seeking even greater confidentiality, Lumo introduces a “ghost mode,” which guarantees that conversations vanish immediately after the window is closed—leaving no digital trace.

The assistant is accessible through a web interface and dedicated Android and iOS apps. Uniquely, it doesn’t require users to create an account—anyone can start chatting or asking questions instantly, enhancing both privacy and accessibility. Lumo also supports file uploads, allowing the AI to answer queries about attached documents. Users with Proton Drive accounts benefit from seamless integration, leveraging Proton’s secure cloud storage for quick file access within Lumo.

How Lumo Compares to Other AI Assistants

Unlike mainstream AI tools such as Apple Intelligence or solutions developed in collaboration with major American or Chinese tech giants, Lumo operates exclusively from Proton’s European datacenters. This enables higher transparency and regulatory compliance, especially regarding the rigorous data protection standards in Europe. Lumo distinguishes itself by refusing to send user queries to any third parties and by basing its intelligence on open-source language models. Importantly, Proton confirms that user data will never be used to train its AI systems.

Zero-Access Encryption: End-to-End Data Control

Lumo leverages Proton’s trusted zero-access encryption technology, previously seen in other Proton products, to allow users to securely store chat histories. Only users can decrypt their message archives on their own devices, reinforcing Proton’s reputation for uncompromising security.

Use Cases and Market Significance

As demand grows for AI solutions that respect user privacy, Lumo’s market relevance comes into sharp focus. The assistant is ideal for professionals, journalists, and everyday users who require confidential conversations and secure file management. From answering complex queries to supporting workflow productivity without sacrificing data protection, Lumo is engineered to meet the needs of a privacy-conscious global audience.

Expanding Proton’s AI Portfolio

Lumo is the latest milestone in Proton’s journey towards developing robust, privacy-driven productivity tools. Last year, the company introduced an AI-powered writing assistant for Proton Mail, reinforcing its mission to bring secure AI innovation directly to users’ devices.

With Lumo, Proton sends a clear message: AI can be powerful without compromising user trust or data privacy.