CommunityServer
The premium Open Source alternative to Microsoft 365
🎯 Best for:Teams requiring a full office suite with strict data sovereignty requirements.
What is CommunityServer?
Replaces proprietary office suites with a self-hosted collaborative environment for documents, projects, and mail. Features a high-fidelity online editor with 100% compatibility with Microsoft Office formats.
Tech Stack
C#Office Suite & Docs
Why CommunityServer?
- • Best-in-class document rendering
- • Integrated mail and project management
- • Strong security and LDAP integration
Limitations
- • Resource intensive (requires 8GB+ RAM)
- • Complex multi-container deployment
- • Mobile editing requires specific apps
3/5/2026
Last Update
663
Forks
202
Issues
Apache-2.0
License
Financial Leak Detected
Stop the "SaaS Tax"
Your team could be burning cash. Switching to CommunityServer instantly boosts your runway.
Competitor Cost
-$1,440
/ year (est. based on Microsoft 365)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%