Alternatives to Expanding Communication for all platforms with any license

  • G Suite icon

    G Suite

    G Suite (formerly Google Apps for Work) is Google's encompassing selection of cloud apps for business, including customizable...

    Commercial Mac Windows Linux Web / Cloud Chrome OS

  • Kolab Community icon

    Kolab Community

    Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.

    Open Source Linux Web / Cloud Self-Hosted

  • Zimbra Collaboration Suite icon

    Zimbra Collaboration Suite

    Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web...

    Freemium Linux Web / Cloud

  • OX Open-Xchange icon

    OX Open-Xchange

    Open-Xchange Server 6 is the most advanced Linux based Groupware solution f. Open-Xchange Server 6 is superior in the following...

    Open Source Linux Web / Cloud

  • Microsoft Office 365 icon

    Microsoft Office 365

    Office 365 is a subscription-based software services that licenses Microsoft Office products for on-premise or cloud-based use. For...

    Commercial Web / Cloud

  • Microsoft Exchange Server icon

    Microsoft Exchange Server

    Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft...

    Commercial Windows Web / Cloud

  • hMail Server icon

    hMail Server

    hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and...

    Open Source Windows

  • iRedMail icon


    A fully fledged, free email server solution, an open source project (GPL v2). Use official binary packages from Linux/BSD...

    Open Source Linux BSD Self-Hosted

  • Zarafa icon


    Open Source Collaboration, providing integration with your existing Linux mailserver, native mobile phone support, Outlook "Look...

    Commercial Mac Windows Linux Web / Cloud

  • MDaemon Messaging Server icon

    MDaemon Messaging Server

    MDaemon Messaging Server software for Windows can be deployed in virtual, hosted cloud or private on-premise environments. It is used...

    Commercial Windows

  • OpenChange icon


    OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols. Exchange is a...

    Open Source Linux

  • eGroupWare icon


    Egroupware is a web based software for team collaboration, central data management and CRM: email client, online calendar, contact and...

    Open Source Linux Web / Cloud

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  • Atmail Email Server icon

    Atmail Email Server

    Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows. ...

    Commercial Linux Web / Cloud

  • Mercury Mail Transport System icon

    Mercury Mail Transport System

    The Mercury Mail Transport System is a mail server that sends and receives messages on behalf of a group of users on a machine or...

    Free Personal Windows

  • Blue-Mind icon


    Blue Mind is a complete solution of company messaging, calendars and collaborative work. It aims to enable you to work daily with...

    Open Source Linux

  • Xeams icon


    Xeams is a secure & powerful mail server for Windows, Linux, Solaris, MacOSX and other flavors or UNIX, which supports SMTP, POP3...

    Free Mac Windows Linux BSD

  • Citadel

    Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD. In...

    Open Source Linux Web / Cloud

  • icon

    Full featured solution for your Email server. Native implementation of last anti-SPAM metods, webmail and easy administration included.

    Free Personal Linux

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  • Axigen icon


    Axigen is an integrated email, calendaring & collaboration platform, built on a unique Linux mail server technology, for increased...

    Freemium Windows Linux BSD Self-Hosted Microsoft Office Outlook

  • MailEnable icon


    MailEnables mail server software provides a powerful, scalable hosted messaging platform for Microsoft Windows.

    Freemium Windows

  • SmarterMail Mail Server icon

    SmarterMail Mail Server

    SmarterMail delivers Exchange-level email server software features for a fraction of the cost. With lower hardware requirements...

    Freemium Windows

  • Alinto

    Established in January 2000, Alinto is one othe principal french editors and operators of collaborative messaging and unified...

    Commercial Web / Cloud

  • HyperOffice Email Service icon

    HyperOffice Email Service

    HyperOffices is a Microsoft Exchange alternative with all the messaging features growing business need - custom business email;...

    Commercial Web / Cloud

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