Proton Sheets

What it does

Proton Sheets is a privacy-focused online spreadsheet application from Proton, the company behind Proton Mail and Proton Drive. It allows users to create, edit, and collaborate on spreadsheets with end-to-end encryption, ensuring that only the user and their chosen collaborators can access the data. The product supports importing Excel and Google Sheets files, real-time collaboration, built-in formulas, charts, and tables. It is part of Proton Drive, an encrypted cloud storage service, and works across devices.

Who it is for

Proton Sheets is designed for individuals and businesses that handle sensitive data and require strong privacy protections. Target users include:

• Professionals managing client data, financial reports, or confidential project information.
• Teams that need to collaborate on spreadsheets without exposing data to third parties (e.g., cloud providers, AI training).
• Existing Proton users who want a seamless, encrypted productivity suite.
• Privacy-conscious organizations subject to strict data protection regulations (e.g., GDPR, Swiss privacy laws).

Why it matters

Most online spreadsheet tools (e.g., Google Sheets, Microsoft Excel Online) do not offer end-to-end encryption, meaning the service provider can access user data. Proton Sheets addresses this gap by providing a fully encrypted alternative. Key benefits include:

• Data sovereignty: Protected by Swiss privacy laws, which are among the strongest in the world.
• No surveillance or AI training: Proton cannot access or use user data for any purpose.
• User control: Granular sharing permissions with the ability to revoke access at any time.
• Integration: Works with Proton Drive and Proton Docs, creating a complete encrypted productivity ecosystem.

Launch signal

Proton Sheets was launched in December 2025 as a new product within the Proton ecosystem. The launch was announced on Proton's official blog and covered by tech media such as MacRumors. The product is available immediately for all Proton users (free and paid) as part of Proton Drive. Business users can access it via Proton Drive for Business plans.

Brand and naming

The name "Proton Sheets" follows Proton's naming convention for its productivity tools (e.g., Proton Mail, Proton Drive, Proton Docs, Proton Calendar). "Sheets" is a generic term for spreadsheets, making the product's purpose immediately clear. The brand leverages Proton's established reputation for privacy and security, positioning Sheets as the trustworthy alternative to mainstream tools. The tagline "Online spreadsheets with you in control" reinforces the core value proposition of user data ownership.