Self-Hosted Microsoft 365 Alternatives

    Microsoft 365 is not available as a self-hosted solution but there are plenty of alternatives for power users and business that want to host a solution on-premise. The best Self-Hosted alternative is Nextcloud, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Microsoft 365 and 19 are available as a self-hosted solution so hopefully you can find a suitable replacement. Other interesting Self-Hosted alternatives to Microsoft 365 are ONLYOFFICE (Freemium, Open Source), CryptPad (Freemium, Open Source), Open365 (Free, Open Source) and Zimbra Collaboration Suite (Freemium, Open Source).

    This page was last updated Jun 14, 2021

    1. You should have full control over your data. We help you achieve that: a safe home for all your data. Secure, under your control and developed in an open, transparent and trustworthy way. We are Nextcloud.
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      Nextcloud vs Microsoft 365 opinions
      pros, cons and recent comments
      Dreadfuldark This is a totally different product. It is not an office suite.
      Negative comment 8 months ago

      0
      Only comparable to one tool or service of O365.
      Negative comment 12 months ago

      -1
      altenativeto Has a convincing onlyoffice integration. +Better data protection. Feels like 2 Years behind office but works very well in the Browser.
      Positive comment 12 months ago

      1
    2. ONLYOFFICE is an opensource office and productivity suite that enables you to manage documents, ONLYOFFICE Projects, team and customer relations in one place.
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      ONLYOFFICE vs Microsoft 365 opinions
      pros, cons and recent comments
      Very goodcompatibility with officeXML files
      Positive comment over 1 year ago

      0
      altenativeto Probably better team functions and good integration in an environment with higher data protection standards.
      Positive comment 12 months ago

      0


    3. CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.
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      • FreeOpen Source
      • Android
      • Self-Hosted
      The open source cloud with LibreOffice online - LibreOffice online + Seafile + KDE. Improve your productivity and communicate better with your team members. The world is moving forward. Welcome to the open source cloud!.

      Discontinued

      The project seems to be no longer developed. Last commit on the GitHub repo was made on June 27th, 2016, but it can be still downloaded and installed.

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    4. 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.


    5. WikiSuite™ is especially suited to knowledge-centric organizations and offers most (80%+) of the data and information management features all organizations need.
      No screenshots yet
    6. Twake is a real-time teamwork platform. It is a suite of collaborative tools that includes the specificities of some best-sellers (slack, trello, google drive,...).
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    7. Nextcloud is the most deployed on-premises file share and collaboration platform. Access & collaborate across your devices. As fully on-premises solution, Nextcloud Hub provides the benefits of online collaboration without the compliance and security risks.
      No screenshots yet
    8. 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
      • 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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    Showing 10 of 19 alternatives