EUAlternatives
    P

    Proton Sheets

    A privacy-focused, end-to-end encrypted collaborative spreadsheet application integrated into the Proton ecosystem.

    CHSwitzerland
    Headquarters
    🇨🇭Switzerland
    Data Hosting
    EU-based
    Structure
    Independent
    Compliance
    —

    Proton Sheets key facts

    Last updated
    Legal entity
    Proton AG
    Headquarters
    Switzerland (CH)
    Ownership
    Independent
    Infrastructure
    Self-hosted (Swiss data centers)
    Open source
    No
    US Cloud Act exposure
    Low (no US parent)
    Replaces
    Google Sheets, Microsoft Excel

    About Proton Sheets

    Proton Sheets is a collaborative spreadsheet tool designed with a zero-knowledge architecture, ensuring that only the user and their invited collaborators can access the data. Launched in 2024 as part of the Proton Drive ecosystem, it provides a secure alternative to mainstream cloud office suites by encrypting not just the files, but the content within the cells, formulas, and metadata client-side. The service is governed by Swiss law, offering a high level of protection against international data requests and mass surveillance. It integrates seamlessly with the broader Proton suite, including Mail, Calendar, and VPN, providing a comprehensive privacy-first productivity environment for both individuals and businesses. The platform maintains a strong focus on transparency, with open-source client applications and regular third-party security audits.

    Alternative to

    Google SheetsMicrosoft Excel

    Hosting & Security

    Infrastructure

    Self-hosted (Swiss data centers)

    Key Features

    End-to-end encryption for cell contents and formulas
    Real-time multiplayer editing (up to 100 collaborators)
    Support for 400+ formulas
    Import/export for .xlsx, .csv, and Google Sheets
    Offline editing with automatic sync
    Version history
    Granular sharing controls (view, edit, comment)

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