Proton Launches Encrypted Spreadsheet Service “Proton Sheets” to Rival Google Sheets and Microsoft Excel

Swiss tech firm Proton is expanding its range of privacy-focused tools with a new addition called Proton Sheets, a spreadsheet service designed to compete with Microsoft Excel and Google Sheets.
The product joins Proton’s existing lineup of encrypted email, calendar, VPN, password manager, and drive tools, giving users a more complete set of alternatives to Big Tech’s cloud-based office platforms.
Businesses use spreadsheets to manage budgets, analyze data, and track confidential information.
Proton argues that the most popular options leave users exposed, since platforms like Google Sheets and Excel often connect to online systems that monitor user activity or feed data into machine-learning models.
These concerns have grown since Google integrated its Gemini AI assistant into Workspace.
The company maintains that Workspace data is not used to train its AI, but the close link between productivity software and artificial intelligence continues to raise questions about what happens behind …