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Microsoft Exchange Server Alternatives for Linux

Microsoft Exchange Server is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is Google Workspace. It's not free, so if you're looking for a free alternative, you could try Kopano or mailcow: dockerized. If that doesn't suit you, our users have ranked more than 25 alternatives to Microsoft Exchange Server and many of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Microsoft Exchange Server are Zentyal, Zimbra Collaboration Suite, Kolab Community and SOGo.

Microsoft Exchange Server alternatives are mainly Mail Servers but may also be WebMail Providers or Calendar Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Microsoft Exchange Server.
This page was last updated Jun 14, 2021
  • Windows
  • Online

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

Learn more about Microsoft Exchange Server

  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.

    Screenshot
    Some users think Google Workspace is a great alternative to Microsoft Exchange Server, some don't.
  2. Kopano icon

    Kopano

    • 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.

    Screenshot
    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  over 5 years ago
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    0
    bobsp

    Scalable, open source with a great UX and it has all the features I need

    Top positive comment  over 5 years ago
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    0
    marcski

    Stable and cheap backend, flexible frontend support, open source, in full control of your data

    Positive comment over 5 years ago
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    0

    OpenSource, better to maintain, "not Microsoft"

    Positive comment over 5 years ago
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    -1

    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.

    Positive comment over 5 years ago
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    -1


  3. mailcow: dockerized icon

    mailcow: dockerized

    • FreeOpen Source
    • Linux
    • Self-Hosted

    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.

    Screenshot
  4. Zentyal icon

    Zentyal

    • Linux

    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.

    Dashboard
    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 over 4 years ago
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    7

    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 almost 2 years ago
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    0

    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 over 2 years ago
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    -3

    Not an Exchange alternative at all. Does basic AD but that is about it. It is more of a gateway server.

    Negative comment almost 3 years ago
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    -1
  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.

    Screenshot
    Most users think Zimbra Collaboration Suite is a great alternative to Microsoft Exchange Server.


  6. Kolab Community icon

    Kolab Community

    • FreemiumOpen Source
    • Linux
    • Online
    • Self-Hosted

    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 icon

    SOGo

    • FreemiumOpen Source
    • Linux
    • Online
    • Thunderbird
    • Cloudron

    SOGo is groupware server with a focus on scalability and open standards.

    Screenshot
  8. iRedMail icon

    iRedMail

    • FreemiumOpen Source
    • Linux
    • BSD
    • Self-Hosted

    A fully fledged, free email server solution, an open source project (GPL v2).

    Main components and working process
  9. OpenChange icon

    OpenChange

    • FreeOpen Source
    • Linux

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

    No screenshots yet
  10. OX App Suite icon

    OX App Suite

    • FreeOpen Source
    • Linux
    • Online
    • Self-Hosted
    • Software as a Service (SaaS)

    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.

    OX Portal
Showing 10 of 26 alternatives