head to head · open source
OpenProject vs CommunityServer
OpenProject has 16,132 GitHub stars, 3,486 forks, 224 open issues and last shipped yesterday. CommunityServer has 3,166 stars, 672 forks, 206 open issues and last shipped 5 months ago. OpenProject leads on adoption by 410% (16,132 vs 3,166 stars). OpenProject is written in Ruby under GPL-3.0; CommunityServer is written in C# under Apache-2.0. OpenProject has attracted 22% as many forks as stars, CommunityServer 21%. OpenProject was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 8884 open source comparisons
Side by side
| OpenProject | CommunityServer | |
|---|---|---|
| GitHub stars | ★ 16K | ★ 3.2K |
| License | GPL-3.0 | Apache-2.0 |
| Written in | Ruby | C# |
| Last push | 2026-09-17 | 2026-05-05 |
| Forks | ⑂ 3.5K | ⑂ 672 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenProject if
- You weight community size — 16K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Ruby
- You value the larger contributor base for long-term maintenance
pick CommunityServer if
- You want the CommunityServer feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C#
- You evaluated both and CommunityServer fits your workflow better
About OpenProject
OpenProject is a web based open source project management software for teams and organizations that need transparency, flexibility, and data sovereignty. It lives in the open source project management ecosystem, with Ruby as the repository language and Angular as a listed topic. The project is positioned as an open alternative to Asana and Basecamp, and the README also compares it with Jira, MS Project, Monday, and YouTrack.
read the full OpenProject overview →
About CommunityServer
CommunityServer, now distributed as ONLYOFFICE Groups from version 11.0, is a free open source collaborative platform written in C and licensed under Apache 2.0. It lives in the ONLYOFFICE Workspace ecosystem and acts as a central hub for documents, projects, clients, and email accounts.
read the full CommunityServer overview →
More in Business Software
Related comparisons
More Project & Work Management projects
Compare either of these against the rest of the Project & Work Management field.
Frequently asked questions
Is OpenProject or CommunityServer more popular?
OpenProject has 16,132 GitHub stars and CommunityServer has 3,166. OpenProject has the larger community by that measure.
Are OpenProject and CommunityServer free?
Both are open source. OpenProject is licensed under GPL-3.0 and CommunityServer under Apache-2.0. Neither carries a licence fee.
What is the difference between OpenProject and CommunityServer?
OpenProject is written in Ruby and CommunityServer in C#. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, OpenProject or CommunityServer?
Choose OpenProject if you want the larger community (16,132 stars) or its GPL-3.0 licence terms. Choose CommunityServer if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.