Lumo 2.0
Proton has released Lumo 2.0, an updated version of its open-source design system. The update includes new components, improved accessibility features, and enhanced dark mode support to help developers build consistent and user-friendly interfaces for Proton's ecosystem of privacy-focused apps.
Background
Proton is a Swiss-based privacy company best known for Proton Mail, Proton VPN, and Proton Drive. Lumo is its internal technical standard for managing user data across its services with privacy guarantees. The Lumo 2.0 update represents a shift in how Proton handles data infrastructure: moving from siloed per-service implementations to a unified system designed to enforce end-to-end encryption and zero-access architecture at the database level. For readers, this matters because Proton’s core value proposition — that it cannot read your data even if compelled by law — rests on these engineering choices. Lumo 2.0 aims to make that promise more systematic and harder to break through misconfiguration, while also enabling new features that require data to be processed without being decrypted.