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, Nextcloud Hub and Zimbra Collaboration Suite.

Microsoft 365 alternatives are mainly Word Processors but may also be Office Suites or Spreadsheet Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Microsoft 365.

Microsoft 365 alternatives page was last updated

Microsoft 365

Paid • Proprietary
Mail Server

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

More about Microsoft 365

Nextcloud
Is this is a good alternative?
Yes
No
Free • Open Source
Cloud Storage Service
File Sync Tool
Online Backup Tool
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
iPad
Self-Hosted
F-Droid
Cloudron
136 Nextcloud alternatives
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.
- - Nextcloud is the most popular Web-based, Android, iPhone, iPad, Android Tablet & Self-Hosted alternative to Microsoft 365.
Suggest and vote on features
Nextcloud Features
1. Privacy focusedNextcloud is considered a privacy friendly alternative.
2. Calendar IntegrationNextcloud lets you sync your tasks and events with your calendar application.
3. Ad-freeNextcloud doesn't contain any form of external advertising.
4. Two-factor AuthenticationNextcloud supports two-factor authentication (2FA).
5. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
6. End-to-End EncryptionNextcloud has E2E Encryption, for entire or parts of the app.
7. Extensible by Plugins/ExtensionsNextcloud can be extended with add-ons, plugins and extensions.
8. Dark ModeNextcloud supports dark mode for comfortable usage in low light conditions.
9. FIDO U2F (2FA) supportNextcloud supports FIDO U2F / passwordless / multi-factor authentication.
Sync Contacts
Security focused
On-premises software
Customizable
Hostable
Cross-Platform
CalDAV Support
Integrated File Sharing
Calendar Sync
Integrated Email Client
Comments about Nextcloud as a Alternative to Microsoft 365
Most users think Nextcloud is a great Microsoft 365 alternative.
Dreadfuldark
This is a totally different product. It is not an office suite.
Negative comment•
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•
1

Guest
Only comparable to one tool or service of O365.
Negative comment•
-1
ONLYOFFICE
Is this is a good alternative?
Yes
No
Free Personal • Open Source
Office Suite
Word Processor
Spreadsheet App
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
iPad
Self-Hosted
AppImageHub
Snapcraft
Flathub
Software as a Service (SaaS)
Flatpak
Cloudron
64 ONLYOFFICE alternatives
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.
- - ONLYOFFICE is the most popular SaaS alternative to Microsoft 365.
Suggest and vote on features
ONLYOFFICE Features
1. Works OfflineONLYOFFICE can be used without the need to connect to the internet.
2. Real time collaborationMultiple users can work together in ONLYOFFICE simultaneously.
3. PortableONLYOFFICE can be used from a USB stick or similar with no prior installation.
4. End-to-End EncryptionONLYOFFICE has E2E Encryption, for entire or parts of the app.
5. Dark ModeONLYOFFICE supports dark mode for comfortable usage in low light conditions.
6. Ad-freeONLYOFFICE doesn't contain any form of external advertising.
7. Spell CheckingONLYOFFICE can detect and correct all types of grammar and spelling mistakes.
8. Privacy focusedONLYOFFICE is considered a privacy friendly alternative.
Compatible with Microsoft Office
Tabbed interface
Nextcloud integration
FOSS
Cloud based
Export to PDF
Multiple languages
Collaborative Workspaces
Integrated Youtube support
Built-in translation
Comments about ONLYOFFICE as a Alternative to Microsoft 365
Almost everyone thinks ONLYOFFICE is a great Microsoft 365 alternative.
altenativeto
Probably better team functions and good integration in an environment with higher data protection standards.
Positive comment•
1

Guest
Very goodcompatibility with officeXML files
Positive comment•
1
Twake
Is this is a good alternative?
Yes
No
Freemium • Open Source
Team Collaboration Tool
Task Management Tool
Spreadsheet App
Mac
Windows
Linux
Self-Hosted
122 Twake alternatives
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...). We provide professional messaging, storage space, online collaborative editors (Words, Excel, PowerPoint), task...
Suggest and vote on features
Twake Features
1. Real time collaborationMultiple users can work together in Twake simultaneously.
Workspaces
Nextcloud Hub
Is this is a good alternative?
Yes
No
Free • Open Source
Team Collaboration Tool
Calendar App
Document Manager
Self-Hosted
53 Nextcloud Hub alternatives
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.
Suggest and vote on features
Nextcloud Hub Features
1. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
2. Ad-freeNextcloud Hub doesn't contain any form of external advertising.
3. Real time collaborationMultiple users can work together in Nextcloud Hub simultaneously.
4. Extensible by Plugins/ExtensionsNextcloud Hub can be extended with add-ons, plugins and extensions.
Photo Gallery
Zimbra Collaboration Suite
Is this is a good alternative?
Yes
No
Freemium • Open Source
Mail Server
Calendar App
Team Collaboration Tool
Linux
Online
Self-Hosted
41 Zimbra Collaboration Suite alternatives
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.
Suggest and vote on features
Zimbra Collaboration Suite Features
1. Real time collaborationMultiple users can work together in Zimbra Collaboration Suite simultaneously.
ActiveSync
Active Directory integration
Kolab Community
Is this is a good alternative?
Yes
No
Freemium • Open Source
Linux
Online
Self-Hosted
42 Kolab Community alternatives
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.
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Kolab Community Features
1. Real time collaborationMultiple users can work together in Kolab Community simultaneously.
CalDAV Support
WebDAV Support
IMAP Support
CardDAV Support
Add a screenshot
WikiSuite
Is this is a good alternative?
Yes
No
Free • Open Source
Linux
Self-Hosted
8 WikiSuite alternatives
WikiSuite™ is especially suited to knowledge-centric organizations and offers most (80%+) of the data and information management features all organizations need.
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WikiSuite Features
1. Real time collaborationMultiple users can work together in WikiSuite simultaneously.
Free courses
Add a screenshot
Kopano
Is this is a good alternative?
Yes
No
Paid • Open Source
Mail Server
Email Client
Mobile Device Management (MDM) Tool
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
Windows Phone
iPad
Self-Hosted
Microsoft Office Outlook
S/MIME
Software as a Service (SaaS)
24 Kopano alternatives
Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface.
Suggest and vote on features
Kopano Features
1. Real time collaborationMultiple users can work together in Kopano simultaneously.
On-premises software
Shared Calendar
CalDAV Support
IMAP Support
S/MIME Support
POP3 Support
Open365
Is this is a good alternative?
Yes
No
Free • Open Source
Office Suite
Email Client
Android
Self-Hosted
38 Open365 alternatives
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!.
Suggest and vote on features
Open365 Features
1. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the 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.
Files app
Is this is a good alternative?
Yes
No
Freemium • Proprietary
Self-Hosted
105 Files app alternatives
Single-file PHP app that can be dropped into any folder, instantly creating a gallery of files and folders.
Suggest and vote on features
Files app Features
Web file manager