Proton, the company best known for its encrypted email and privacy-first digital tools, has rolled out a major upgrade to its AI assistant, Lumo. The update, dubbed version 1.1, promises faster, smarter, and more reliable performance—without compromising user privacy.
AI assistants have become everyday companions for tasks like drafting emails, trip planning, or answering quick questions. But for many, the convenience comes at a cost: personal data being logged, analyzed, and fed back into corporate systems. Proton says Lumo is designed to break that tradeoff.
With this update, Lumo has seen a significant boost in performance. According to Proton, the assistant’s reasoning abilities have improved by 200%, making it more effective at tackling complex, multi-step problems. Its contextual understanding has jumped by 170%, allowing it to better interpret user intent, while code generation accuracy has improved by 40%—a change that should appeal to developers.
Beyond speed and intelligence, Proton is doubling down on privacy. Unlike most mainstream AI services, Lumo’s conversations are encrypted end-to-end, meaning not even Proton can access them. The company doesn’t log chats, nor does it use personal data to train its AI models. In a move to reinforce transparency, Proton has also open-sourced the code for Lumo’s mobile apps, letting anyone verify how the system works.
Ryan Daws
To unlock the full feature set and unlimited use, Proton offers a premium tier called Lumo Plus. The company is betting that privacy-conscious users will prefer paying for secure AI rather than relying on free tools that monetize personal data.
This update signals Proton’s intent to compete directly with larger tech firms in the AI space. While still an underdog, the company is positioning Lumo as proof that users don’t need to choose between powerful AI capabilities and strong data protection.
