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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, Twake, Zimbra Collaboration Suite and WikiSuite.

Microsoft 365 alternatives are mainly Office Suites but may also be Word Processors or Spreadsheet Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Microsoft 365.
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  • Online
  • Software as a Service (SaaS)

Microsoft 365 is a subscription-based software services that licenses Microsoft Office products for on-premise or...

Learn more about Microsoft 365

  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.

    Simple and powerful file sync & share
    Nextcloud vs Microsoft 365 opinions
    pros, cons and recent comments
    altenativeto

    Has a convincing onlyoffice integration. +Better data protection. Feels like 2 Years behind office but works very well in the Browser.

    Positive comment ago
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    1
    Dreadfuldark

    This is a totally different product. It is not an office suite.

    Negative comment ago
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    0

    Only comparable to one tool or service of O365.

    Negative comment ago
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    -1
  2. ONLYOFFICE icon

    ONLYOFFICE

    • Free PersonalOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Software as a Service (SaaS)
    • Cloudron

    ONLYOFFICE is an open-source online collaborative office combining editors for documents, spreadsheets, presentations, and forms. It is compatible with all popular formats and features maximum support for MS Office files.

    Screenshot
    ONLYOFFICE vs Microsoft 365 opinions
    pros, cons and recent comments
    altenativeto

    Probably better team functions and good integration in an environment with higher data protection standards.

    Positive comment ago
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    1

    Very goodcompatibility with officeXML files

    Positive comment ago
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    1


  3. Twake icon

    Twake

    • FreemiumOpen Source
    • Mac
    • Windows
    • Linux
    • Self-Hosted

    Twake is a real-time teamwork platform. It is a suite of collaborative tools that includes the specificities of some bestsellers (Slack, Trello, Google Drive...).

    Screenshot
  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.

    Screenshot
  5. WikiSuite icon

    WikiSuite

    • FreeOpen Source
    • Linux
    • Self-Hosted

    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. 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
  7. Nextcloud Hub icon

    Nextcloud Hub

    • FreeOpen Source
    • Self-Hosted

    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. 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
  9. Open365 icon

    Open365

    • 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.

    Screenshot
  10. grommunio icon

    grommunio

    • FreemiumOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Self-Hosted

    grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.

    Screenshot
Showing 10 of 19 alternatives