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    Microsoft Exchange Server Alternatives

    Microsoft Exchange Server is described as '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' and is a Mail Server in the Social & Communications category. There are more than 25 alternatives to Microsoft Exchange Server for a variety of platforms, including Linux, Online / Web-based, Windows, Self-Hosted solutions and Mac. The best alternative is Kopano, which is both free and Open Source. Other great apps like Microsoft Exchange Server are Google Workspace (Paid), hMail Server (Free, Open Source), Zentyal (Paid, Open Source) and mailcow: dockerized (Free, Open Source).

    This page was last updated Jun 14, 2021

      • FreemiumOpen Source
      • Mac
      • Windows
      • Linux
      • Online
      • Android
      • iPhone
      • Android Tablet
      • Windows Phone
      • iPad
      • Self-Hosted
      • Microsoft Office Outlook
      • S/MIME
      • Software as a Service (SaaS)
      Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface.
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      Kopano vs Microsoft Exchange Server opinions
      Almost everyone thinks Kopano is a great alternative to Microsoft Exchange Server.
      hn1 Kopano has scalable backend and can do full MAPI server and clientside. The Webapp and Deskapp has intuitive and modern UI/UX.
      Top positive comment  about 5 years ago

      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.
      Top positive comment  about 5 years ago

      marcski Stable and cheap backend, flexible frontend support, open source, in full control of your data
      Positive comment almost 5 years ago

      bobsp Scalable, open source with a great UX and it has all the features I need
      Positive comment almost 5 years ago

      OpenSource, better to maintain, "not Microsoft"
      Positive comment about 5 years ago

    1. Google Workspace (formerly Google Apps for Work / G Suite) is Google's encompassing selection of cloud apps for business, including customizable products under custom domain names.
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      Some users think Google Workspace is a great alternative to Microsoft Exchange Server, some don't.

    2. 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 world.
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      Almost everyone thinks hMail Server is a great alternative to Microsoft Exchange Server.
    3. Zentyal is a native Microsoft Active Directory implementation on Linux incorporating all the network services required in a small and medium business environment: Directory & Domain Server, Mail Server, Gateway and Infrastructure Server.
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      Zentyal vs Microsoft Exchange Server opinions
      Some users think Zentyal is a great alternative to Microsoft Exchange Server, some don't.
      No Exchange alternative and no support for MS Outlook Client
      Negative comment almost 4 years ago

      While the comments below suggest that this is AD, not exchange replacement. It was supposed to ship with SoGo / openchange as a managed add-on. You also strangely enough can't have exchange without AD. but guests do keep on posting. Exchange is just an Add-On to AD. (It extends the schema).
      Positive comment over 1 year ago

      Not an Exchange alternative at all. Does basic AD but that is about it. It is more of a gateway server.
      Negative comment over 2 years ago

      They do not share any common functionality. Zentyal is an Active Directory substitute, Microsoft Exchange is a groupware E-Mail (enterprise grade) server.
      Negative comment about 2 years ago

    4. mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration.
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    5. Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
      Most users think Zimbra Collaboration Suite is a great alternative to Microsoft Exchange Server.
    6. Kolab is entirely Free and Open Source Software (a.k.a. FOSS), and uses Open Standards. We’ll get to why this is important to us, and hope that it is important to you thereafter.
      No screenshots yet
      Most users think Kolab Community is a great alternative to Microsoft Exchange Server.
    7. SOGo is groupware server with a focus on scalability and open standards.
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    8. 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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      Kolab Now vs Microsoft Exchange Server opinions
      Some users think Kolab Now is a great alternative to Microsoft Exchange Server, some don't.
      With Microsoft no longer supporting our existing setup, this was a great alternative.
      Positive comment over 6 years ago

      • 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.
    Showing 10 of 45 alternatives