Overview
- Proton says all data, including filenames and metadata, is end-to-end encrypted so even the company cannot read spreadsheet contents.
- Sheets runs in web browsers and inside the Proton Drive app, with access free to anyone who has a Proton Drive account.
- The app offers built-in formulas, charts and graphs, real-time co-editing, CSV/XLS import with encryption applied, and granular view or edit permissions.
- Proton frames the release as an alternative to Google Sheets and Excel due to concerns over data collection practices and AI assistant integrations.
- With Sheets now live, Proton’s encrypted workspace spans email, calendar, documents, and spreadsheets under Switzerland’s data-privacy laws.