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Open-Xchange (OX)

The open platform for business communication.

Visit Open-Xchange (OX)

Open-Xchange (OX) provides secure email and productivity software for service providers and public-sector organisations that want control over data, deployment, and platform risk. OX App Suite combines email, calendar, and collaboration features in an interface designed for desktop and mobile use.

The suite includes an integrated AI agent that works within email and calendar to draft messages, schedule appointments, search and summarize content, and automate multi-step tasks. The OX Group also offers PowerDNS, authoritative DNS software for service providers and enterprises, and Dovecot Pro, a commercial email server for high-scale infrastructure.

OX targets telcos, hosting providers, ISPs, government, education, and regulated institutions. The company describes its software as multi-tenant and carrier-grade, with control over packaging, branding, and deployment. No free plan, trial, or pricing model is stated on the provided pages.

12 alternatives to Open-Xchange (OX)

Ranked by how well each tool replaces Open-Xchange (OX): shared features, audience, price and popularity.

  1. IceWarp

    Business Email & Collaboration Suite Made in the EU

    Covers 3 of 15 key features.

    59 out of 100 match$1.50/mo

  2. Apache James

    Emails at the heart of your business logic

    Covers 2 of 15 key features and has a free plan.

    Free planOpen source
    58 out of 100 matchContact sales

  3. GMX

    Webmail service offering free email accounts with cloud storage, calendar, contacts and a

    Covers 2 of 15 key features and has a free plan.

    Free plan
    58 out of 100 matchFree

  4. Xeams

    A free email server with privacy and security focus

    Covers 0 of 15 key features and has a free plan.

    Free plan
    58 out of 100 matchFree

  5. Thexyz

    Private, ad-free email hosting on your own domain, hosted in Canada, with domains, servers

    Covers 2 of 15 key features and has a free plan.

    Free plan
    58 out of 100 match$2.95/mo

  6. eXo Platform

    Open-source digital workplace platform combining intranet, collaboration, knowledge and A

    Covers 3 of 15 key features.

    Open source
    57 out of 100 matchContact sales

  7. Xerox DocuShare

    AI-Driven Solutions for Faster, Smarter Document Management

    Covers 6 of 15 key features.

    57 out of 100 match—

  8. Dovecot

    The secure, high-performance email server.

    Covers 0 of 15 key features.

    Open source
    56 out of 100 match—

  9. BlackBerry

    Critical Event Management.

    Covers 5 of 15 key features.

    56 out of 100 matchContact sales

  10. Fastmail

    Email and calendar made better

    Covers 2 of 15 key features and has a free plan.

    Free plan
    56 out of 100 matchContact sales

  11. Kopano Cloud

    A Unified Email Experience

    Covers 2 of 15 key features.

    55 out of 100 match—

  12. Kolab Now

    Secure and Private Email, Calendars and More

    Covers 3 of 15 key features.

    Open source
    55 out of 100 match$5/mo