Open Source Swift Cloud Storage Software

Proton Drive for iOS is the official iPhone and iPad client repository for Proton’s end-to-end encrypted cloud storage service, intended to securely back up and share files within the Proton ecosystem. The project is built around Apple’s native toolchain and is designed to be opened as an Xcode workspace, reflecting a production-grade iOS app structure with standard signing and provisioning requirements. It includes a stated trust model section, reinforcing that the client is meant to be scrutinized and understood as part of a privacy-first architecture rather than treated as a black box. Dependency management is handled through Swift Package Manager, keeping builds consistent and minimizing external tooling complexity for contributors and auditors. While it is open source and positioned for public review, the repository explicitly indicates that contributions are not accepted at the moment, which signals a controlled development and release pipeline.

Proton Drive for macOS is Proton’s official macOS client repository for end-to-end encrypted cloud storage, designed to provide a desktop experience that integrates naturally with macOS while keeping sync logic transparent and inspectable. The project explicitly separates responsibilities into two major development targets: a menu bar app and a File Provider extension that handles file synchronization operations, reflecting Apple’s modern approach to cloud file integration on macOS. It is built using Xcode and an Xcode workspace, with setup steps that walk through provisioning profiles for multiple targets, which is typical for macOS apps that include extensions and background components. The repository includes practical debugging guidance for attaching to the File Provider process, acknowledging real-world complexity in extension debugging and system integration.