Alternatives to Microsoft Exchange Server for all platforms with any license



Web / Online

Show 12 less popular platforms
  • G Suite icon

    G Suite

    G Suite (formerly Google Apps for Work) is Google's encompassing selection of cloud apps for business, including customizable products under custom domain names. It...

    Commercial Mac Windows Linux Web Chrome OS

  • Kopano icon


    Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface. Kopano helps you work smarter with people within and outside...

    Open Source Mac Windows Linux Web Android ... iPhone Android Tablet Windows Phone iPad Microsoft Office Outlook

    • Kopano has scalable backend and can do full MAPI server and clientside. The Webapp and Deskapp has intuitive and modern UI/UX. hn1Jan 2017 Disagree   Agree
    • I tried a lot of MS alternatives, OX, Zimbra, Zentyal, but what fits most with Outlook Sync was the new Kopano, it's more flexible. You can use the web app or desktop app too. Guest • Jan 2017 Disagree   Agree
    • Scalable, open source with a great UX and it has all the features I need bobspFeb 2017 Disagree   Agree
    • Stable and cheap backend, flexible frontend support, open source, in full control of your data marcskiFeb 2017 Disagree   Agree
    • OpenSource, better to maintain, "not Microsoft" Guest • Jan 2017 Disagree   Agree
  • Zentyal icon


    Zentyal is a native Microsoft Active Directory® implementation on Linux incorporating all the network services required in a small and medium business environment:...

    Open Source Linux

    No features added Add a feature
  • SOGo icon


    SOGo is groupware server with a focus on scalability and open standards. SOGo provides a rich AJAX-based Web interface and supports multiple native clients through...

    Open Source Linux Web Thunderbird Cloudron

  • 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 enthusiasts in all parts of the...

    Open Source Windows

  • Kolab Now icon

    Kolab Now

    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.

    Commercial Web DAVdroid

    • With Microsoft no longer supporting our existing setup, this was a great alternative. Guest • Sep 2015 Disagree   Agree
  • Zarafa icon


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

    Commercial Mac Windows Linux Web

  • Kerio Connect icon

    Kerio Connect

    Kerio Connect makes email, calendars, contacts and task management easy and affordable. With Kerio Connect, you have immediate, secure access to your communications...

    Commercial Mac Windows Linux Web

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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. Features: Webmail Calendar Addressbook ...

    Commercial Linux Web

  • mailcow icon


    mailcow is a mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration.

    Open Source Linux

    No features added Add a feature
  • iRedMail icon


    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...

    Open Source Linux BSD Self-Hosted

    No features added Add a feature

Microsoft Exchange Server Comments

Microsoft Exchange has been described as "the only reason w ...

Comment by BadTim
about Microsoft Exchange Server Jun 2011

Microsoft Exchange has been described as "the only reason why most businesses don't move to Mac" and the person who wrote that might have been right (before Windows 7 was released). Exchange is a fantastic tool for keeping all of your devices in sync as well as keeping your team in sync at the same time.

Microsoft has poured a ton of resources to keep Exchange competitive in a market where there are few other competitors and they've done a good job of keeping new features and compatibility rolling in as the years roll on.

The worst thing about Exchange is the need to either have a full-fledged Windows Server to run it on (several thousands of dollars if executed correctly as well as a few hundred per month to pay an IT guy to keep it patched and ready to go) or you have to commit to an online Exchange Hosting Service to reap the benefits. (The second option is usually the one that I recommend unless you have lots of money or a large team - Apptix does a good job of Hosted Exchange - shameless plug: )

I would love to see a viable alternative with as many associated supporting professionals enter the marketplace but at this time Exchange is still the champion.

(For the record; I operate my own company using Google Hosted Apps and we love it!)