Self-hosted alternatives to Microsoft 365
Want office suite and groupware without handing your data to Microsoft 365? These 26 open-source apps run on your own server. Cheapest estimated hosting starts at about $10/month.
| App | Health | Stars | License | Docker | RAM (est.) | From |
|---|---|---|---|---|---|---|
| Nextcloud | Actively maintained | 37.4k | AGPL-3.0 | – | 2 GB | $10/mo |
| Etherpad | Actively maintained | 18.6k | Apache-2.0 | ✓ | 4 GB | $20/mo |
| Grist | Actively maintained | 12k | Apache-2.0 | ✓ | 4 GB | $20/mo |
| CryptPad | Actively maintained | 8k | AGPL-3.0 | ✓ | 4 GB | $20/mo |
| ONLYOFFICE | Actively maintained | 7.1k | AGPL-3.0 | ✓ | 4 GB | $20/mo |
| Seafile | Maintained | 15.4k | GPL-2.0, GPL-3.0, AGPL-3.0, Apache-2.0 | – | 4 GB | $20/mo |
| SOGo | Actively maintained | 2.2k | LGPL-2.1 | – | 4 GB | $20/mo |
| Sync-in | Actively maintained | 2k | AGPL-3.0 | ✓ | 4 GB | $20/mo |
| bewCloud | Actively maintained | 1.2k | AGPL-3.0 | ✓ | 4 GB | $20/mo |
| Colanode | Maintained | 5.2k | Apache-2.0 | ✓ | 4 GB | $20/mo |
| Openmeetings | Actively maintained | 688 | Apache-2.0 | ✓ | 4 GB | $20/mo |
| egroupware | Actively maintained | 301 | GPL-2.0 | ✓ | 4 GB | $20/mo |
| Group Office | Actively maintained | 285 | AGPL-3.0 | – | 4 GB | $20/mo |
| Tracim | Maintained | 275 | AGPL-3.0, LGPL-3.0, MIT | – | 4 GB | $20/mo |
| Tine | Actively maintained | 22 | AGPL-3.0 | ✓ | 4 GB | $20/mo |
| Citadel | Health unknown | – | GPL-3.0 | ✓ | 4 GB | $20/mo |
| Collabora Online Development Edition | Health unknown | – | MPL-2.0 | – | 4 GB | $20/mo |
| Cozy Cloud | Health unknown | – | GPL-3.0 | – | 4 GB | $20/mo |
| Digibuzzer | Health unknown | – | AGPL-3.0 | – | 4 GB | $20/mo |
| Digipad | Health unknown | – | AGPL-3.0 | – | 4 GB | $20/mo |
| Digiscreen | Health unknown | – | AGPL-3.0 | – | 4 GB | $20/mo |
| Digislides | Health unknown | – | AGPL-3.0 | – | 4 GB | $20/mo |
| Digistorm | Health unknown | – | AGPL-3.0 | – | 4 GB | $20/mo |
| Digitools | Health unknown | – | AGPL-3.0 | – | 4 GB | $20/mo |
| Digiwall | Health unknown | – | AGPL-3.0 | – | 4 GB | $20/mo |
| Zimbra Collaboration | Health unknown | – | GPL-2.0, CPAL-1.0 | – | 4 GB | $20/mo |
The options in detail
1. Nextcloud
Access and share your files, calendars, contacts, mail and more from any device, on your terms.
Actively maintained Last activity 2026-11-04. Latest release v35.0.2 (2026-10-15). Needs roughly 2 GB RAM. How to run it →
2. Etherpad
Highly customizable online editor providing collaborative editing in real-time.
Actively maintained Last activity 2026-11-02. Latest release v3.3.13 (2026-11-02). Needs roughly 4 GB RAM. How to run it →
3. Grist
Next-generation spreadsheet with relational structure, formula-based access control, and a portable, self-contained format (alternative to Airtable).
Actively maintained Last activity 2026-11-02. Latest release v1.7.22 (2026-10-29). Needs roughly 4 GB RAM. How to run it →
4. CryptPad
Collaboration suite built to enable collaboration, synchronizing changes to documents in real time.
Actively maintained Last activity 2026-10-28. Latest release 2026.10.0 (2026-10-21). Needs roughly 4 GB RAM. How to run it →
5. ONLYOFFICE
Office suite that enables you to manage documents, projects, team and customer relations in one place.
Actively maintained Last activity 2026-10-26. Latest release v10.0.0 (2026-10-12). Needs roughly 4 GB RAM. How to run it →
6. Seafile
File hosting and sharing solution primary for teams and organizations.
Maintained Last activity 2026-10-16. Latest release v9.0.5 (2024-02-27). Needs roughly 4 GB RAM. How to run it →
7. SOGo
SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface.
Actively maintained Last activity 2026-11-02. Latest release SOGo-5.12.12 (2026-10-13). Needs roughly 4 GB RAM. How to run it →
8. Sync-in
File storage, syncing, sharing, and collaboration with real-time editing, permission management, and desktop/CLI clients.
Actively maintained Last activity 2026-11-01. Latest release v2.6.2 (2026-11-01). Needs roughly 4 GB RAM. How to run it →
9. bewCloud
File sharing + sync, notes, and photos (alternative to Nextcloud and ownCloud's RSS reader).
Actively maintained Last activity 2026-10-18. Latest release v4.21.0 (2026-10-18). Needs roughly 4 GB RAM. How to run it →
10. Colanode
Collaboration suite with real-time messaging, rich text pages, file management, and dynamic databases - built for offline work (alternative to Slack, Notion).
Maintained Last activity 2026-04-03. Latest release v0.4.7 (2026-04-03). Needs roughly 4 GB RAM. How to run it →
11. Openmeetings
Video conferencing, instant messaging, whiteboard, collaborative document editing and other groupware tools using API functions of the Red5 Streaming Server for Remoting and Streaming.
Actively maintained Last activity 2026-11-02. Latest release 9.1.0 (2026-07-14). Needs roughly 4 GB RAM. How to run it →
12. egroupware
Software suite including calendars, address books, notepad, project management tools, client relationship management tools (CRM), knowledge management tools, a wiki and a CMS.
Actively maintained Last activity 2026-11-02. Latest release 26.10.20261030 (2026-10-30). Needs roughly 4 GB RAM. How to run it →
13. Group Office
Enterprise CRM and groupware tool. Share projects, calendars, files and e-mail online with co-workers and clients.
Actively maintained Last activity 2026-11-02. Latest release v26.0.57 (2026-11-02). Needs roughly 4 GB RAM. How to run it →
14. Tracim
Collaborative Platform for team collaboration: file,threads,notes,agenda,etc.
Maintained Last activity 2026-10-28. Latest release release_04.12.00 (2024-12-23). Needs roughly 4 GB RAM. How to run it →
15. Tine
Software for digital collaboration in companies and organizations. From powerful groupware functionalities to clever add-ons, tine combines everything to make daily team collaboration easier.
Actively maintained Last activity 2026-11-02. Latest release weekly-2026.44.1 (2026-10-31). Needs roughly 4 GB RAM. How to run it →
16. Citadel
Groupware including email, calendar/scheduling, address books, forums, mailing lists, IM, wiki and blog engines, RSS aggregation and more.
Health unknown Needs roughly 4 GB RAM. How to run it →
17. Collabora Online Development Edition
Collabora Online Development Edition (CODE) is a powerful LibreOffice-based online office that supports all major document, spreadsheet and presentation file formats, which you can integrate in your own infrastructure.
Health unknown Needs roughly 4 GB RAM. How to run it →
18. Cozy Cloud
Personal cloud where you can manage and sync your files, notes, contacts, passwords, and documents.
Health unknown Needs roughly 4 GB RAM. How to run it →
19. Digibuzzer
Create a virtual game room around a connected buzzer (documentation in French).
Health unknown Needs roughly 4 GB RAM. How to run it →
20. Digipad
Online application for creating collaborative digital notepads (documentation in French).
Health unknown Needs roughly 4 GB RAM. How to run it →
21. Digiscreen
Interactive whiteboard/wallpaper for the classroom, in person or remotely (documentation in French).
Health unknown Needs roughly 4 GB RAM. How to run it →
22. Digislides
Create multimedia presentations in a quick and easy way (documentation in French).
Health unknown Needs roughly 4 GB RAM. How to run it →
23. Digistorm
Create collaborative surveys, quizzes, brainstorms, and word clouds (documentation in French).
Health unknown Needs roughly 4 GB RAM. How to run it →
24. Digitools
Set of simple tools to accompany the animation of courses in person or remotely (documentation in French).
Health unknown Needs roughly 4 GB RAM. How to run it →
25. Digiwall
Create multimedia collaborative walls for in-person or remote work (documentation in French).
Health unknown Needs roughly 4 GB RAM. How to run it →
26. Zimbra Collaboration
Email, calendar, collaboration server with Web interface and lots of integrations.
Health unknown Needs roughly 4 GB RAM. How to run it →
Why self-host instead of Microsoft 365?
- Own your data — it lives on a server you control, with backups you decide on.
- Predictable cost — a small VPS often replaces per-seat pricing for a whole team or family.
- No lock-in — open-source licenses let you keep running the software even if a vendor disappears.
The trade-off: you are responsible for updates, backups and security. Pick an app marked Actively maintained and with Docker support for the easiest ride.
Browse related categories
Other alternatives guides
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