Free 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 is available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Microsoft Exchange Server are Zentyal (Paid, Open Source), Zimbra Collaboration Suite (Freemium, Open Source), Kolab Community (Freemium, Open Source) and SOGo (Freemium, Open Source).

    This page was last updated Jun 17, 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  over 4 years ago

      0
      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  over 4 years ago

      -1
      marcski Stable and cheap backend, flexible frontend support, open source, in full control of your data
      Positive comment over 4 years ago

      0
      bobsp Scalable, open source with a great UX and it has all the features I need
      Positive comment over 4 years ago

      0
      OpenSource, better to maintain, "not Microsoft"
      Positive comment over 4 years ago

      -1
    1. 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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    2. 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.
    3. 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.
      • FreemiumOpen Source
      • Linux
      • Online
      • Thunderbird
      • Cloudron
      SOGo is groupware server with a focus on scalability and open standards.
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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.
    4. Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD.
      No screenshots yet
      • 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.
      No screenshots yet
    5. OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.
      No screenshots yet
    6. grammm efficiently combines all requirements of modern, digital communication and collaboration.
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      grammm vs Microsoft Exchange Server opinions
      pros, cons and recent comments
      norbertlambing As the first open source solution to offer a full-featured OutlookAnywhere (RPC over HTTP) and MAPI/HTTP implementation, grammm is the alternative to proprietary backends for native interoperability with Microsoft Outlook
      Positive comment about 2 months ago

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    Showing 10 of 14 alternatives