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    CrossBox Alternatives

    CrossBox is described as 'Email With a modern and intuitive interface Chat Real-time Text, Audio & Video chat with file sharing File storage With a document previewer File sharing File and document sharing within the company, privately, or publicly Contacts Personal and company-wide' and is a Mail Server in the Office & Productivity category. There are more than 25 alternatives to CrossBox for a variety of platforms, including Linux, Online / Web-based, Windows, Self-Hosted solutions and Mac. Most alternatives are Mail Servers and WebMail Providers. The best alternative is Roundcube, which is both free and Open Source. Other great apps like CrossBox are Google Workspace (Paid), Zoho (Paid), mailcow: dockerized (Free, Open Source) and Microsoft 365 (Paid).

    This page was last updated Oct 25, 2021

    1. Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
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      • FreemiumOpen Source
      • Linux
      • BSD
      • Self-Hosted
      A fully fledged, free email server solution, an open source project (GPL v2). Use official binary packages from Linux/BSD distributions, with both i386 and x86_64 support. Easy, fast deployment in LESS THAN 1 MINUTE. View YouTube Video to check how easy it is.


    2. OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.
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    3. Blue Mind is a complete solution of company messaging, calendars and collaborative work. It aims to enable you to work daily with comprehensive, useful, efficient and effective tools.
    4. Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft Servers line of server products and is widely used by enterprises using Microsoft infrastructure solutions.


    5. Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD.
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    6. The OX App Suite by Open-Xchange is web-based platform offering a suite of apps like an email client, calendar, contacts magement, cloud storage with synchronization and productivity apps for word processing, spreadsheets and presentations.
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    7. Axigen provides a multi-tenant, fully integrated, multi-platform, all-in-one email, calendaring and collaboration messaging solution. It grants extensive branding options and is localized in over 29 languages (including right-to-left writing mode).
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      • FreeOpen Source
      • Mac
      • Linux
      Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.
      • FreeOpen Source
      • Mac
      • Windows
      • Linux
      • Self-Hosted
      James stands for Java Apache Mail Enterprise Server! It has a modular architecture based on a rich set of modern and efficient components which provides at the end complete, stable, secure and extendable Mail Servers running on the JVM.
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    Showing 20 of 42 alternatives