Proton Launches Encrypted Sheets as a Privacy-First Alternative to Google, Microsoft Excel

Proton has launched Proton Sheets, a Proton Drive cloud spreadsheet tool with stronger privacy controls than Google Sheets or Microsoft Excel. The company positions Sheets as a way to plan budgets, track projects, and manage business data without exposing information to advertising systems or AI training pipelines.

Proton Sheets uses end-to-end encryption for all content, including cell values, formulas, and filenames. Proton stores data in Switzerland and says only the account holder and their collaborators can access it. The company says it cannot read spreadsheets stored on its servers because the encryption keys remain with users.

The app supports modern spreadsheet features, including formulas, charts, and real-time collaboration. Teams can edit the same sheet together, see changes as they happen, share files through Proton Drive links, and control who can view or edit each spreadsheet. Users can import existing CSV and XLS files into Proton Drive to encrypt them, and ...