EUAlternatives
    Open-Xchange logo

    Open-Xchange

    Global leader in open-source communication and office productivity software for service providers and enterprises.

    DEGermany
    Headquarters
    🇩🇪Germany
    Data Hosting
    EU-based
    Structure
    Independent
    Compliance
    —

    Open-Xchange key facts

    Last updated
    Legal entity
    Open-Xchange AG
    Headquarters
    Germany (DE)
    Ownership
    Independent
    Infrastructure
    Rackspace, X-ION GmbH, Scality
    Deployment
    SaaS
    Open source
    No
    US Cloud Act exposure
    Low (no US parent)
    Replaces
    Microsoft Exchange, Google Workspace, Microsoft 365

    About Open-Xchange

    Open-Xchange is a leading provider of open-source communication and office productivity software. Headquartered in Germany, the company develops the OX App Suite, a comprehensive platform including email, calendar, and document collaboration tools designed to compete with global proprietary stacks. Their software powers the email services of many of the world's largest internet service providers (ISPs) and telecommunications companies. The company is also the steward of Dovecot, the world's most popular IMAP server, and PowerDNS, providing critical internet infrastructure components. Open-Xchange emphasizes a 'free and open' internet, offering flexible deployment models including on-premises installations for maximum data sovereignty or SaaS-based delivery through OX Cloud. Their recent innovations include integrating AI features directly into the communication workflow while maintaining a focus on privacy and open standards.

    Alternative to

    Microsoft ExchangeGoogle WorkspaceMicrosoft 365

    Deployment Options

    SaaS

    Hosting & Security

    Infrastructure

    Rackspace, X-ION GmbH, Scality

    Key Features

    OX App Suite (Email & Collaboration)
    OX Dovecot (IMAP Server)
    OX PowerDNS (DNS Services)
    OX Drive (File Management)
    OX Documents (Text, Spreadsheet, Presentation)
    OX AI (UI-integrated AI features)
    White-labeling and Customization
    Mobile Sync via PUSH or ActiveSync

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