In a major update, Proton adds privacy-safe document collaboration to Drive, its freemium E2EE cloud storage service

Proton introduced Docs in Proton Drive, adding end-to-end encrypted collaborative document creation and editing to its secure cloud storage, with features like markdown and rich text support, code blocks, checklists, .docx compatibility, image embeds, comments with resolution, and real-time cursors; collaboration invites require a Proton account, with free access up to 5GB and paid tiers beyond. Proton highlights its zero-knowledge architecture, plans to open-source the docs code for auditability, aims to expand team collaboration capabilities, and has transitioned to a nonprofit foundation structure to reinforce its long-term privacy mission.