Proton Launches Encrypted Spreadsheets to Challenge Google Sheets

Proton has launched a new encrypted spreadsheet tool. The service is called Proton Sheets. It launched on December 4, 2025. This tool offers a privacy-focused alternative to services like Google Sheets.

The company says this move addresses growing data privacy concerns. It is part of Proton’s expanding suite of encrypted productivity apps.

How Proton Sheets Protects Your Business Data

Proton Sheets encrypts all user data by default. This includes the actual spreadsheet content. It also encrypts file names and associated metadata.

According to Proton, not even their own staff can access your data. The tool supports common formulas and data visualization features. Users can also create charts and graphs securely.

This level of security is a direct response to modern data practices. Big Tech firms often use data from their productivity tools. That data can feed into AI training models.

Proton’s new tool aims to stop that. It gives control back to the user. Businesses can now collaborate without surveillance.

A Growing Encrypted Ecosystem for Work

The launch completes a core set of productivity tools for Proton. The company already offers encrypted email, calendar, and document editing. Proton Drive now integrates Sheets directly into its storage service.

Users can import existing CSV and XLS files. Those files gain encryption protection immediately. Real-time collaboration is also supported with user-controlled permissions.

Anant Vijay Singh is the head of product at Proton Drive. He stated the launch is about reclaiming data sovereignty. He highlighted the risks of AI integration in standard platforms.

The tool is available through web browsers now. It is also accessible within the Proton Drive app. This provides a unified, secure workspace.

The arrival of Proton Sheets marks a significant shift. It provides a viable, secure alternative for spreadsheet work. This launch directly challenges the data models of incumbent tech giants.

Info at your fingertips

What makes Proton Sheets different from Google Sheets?

Proton Sheets encrypts everything by default. Google does not. This means your data and file names are private from everyone, including the service provider itself.

Can I work on spreadsheets with my team in real-time?

Yes. Proton Sheets supports real-time collaboration. You control who can view or edit each file, all within the encrypted environment.

Does it work with my existing Excel files?

Yes. You can import standard .CSV and .XLS files. Once imported, they are protected with Proton’s end-to-end encryption.

Where can I access Proton Sheets?

You can use it through any modern web browser. It is also built directly into the Proton Drive application for a seamless experience.

Why is this launch important for businesses?

It protects sensitive business intelligence. It prevents proprietary formulas and data from being used to train external AI models without your consent.