head to head · open source
OpenProject vs treesheets
OpenProject has 16,631 GitHub stars, 3,615 forks, 224 open issues and last shipped yesterday. treesheets has 3,170 stars, 224 forks, 54 open issues and last shipped 2 days ago. OpenProject leads on adoption by 425% (16,631 vs 3,170 stars). OpenProject is written in Ruby under GPL-3.0; treesheets is written in C++ under Zlib. OpenProject has attracted 22% as many forks as stars, treesheets 7%. 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.
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Side by side
| OpenProject | treesheets | |
|---|---|---|
| GitHub stars | ★ 17K | ★ 3.2K |
| License | GPL-3.0 | Zlib |
| Written in | Ruby | C++ |
| Last push | 2026-10-25 | 2026-10-24 |
| Forks | ⑂ 3.6K | ⑂ 224 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenProject if
- You weight community size — 17K 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 treesheets if
- You want the treesheets feature set and don't need the biggest community
- You prefer the Zlib license terms
- Your stack matches C++
- You evaluated both and treesheets fits your workflow better
About OpenProject
OpenProject We empower teams to achieve great things together for the good of society. OpenProject is a web based open source project management software for teams and organizations that require transparency, flexibility, and data sovereignty. Manage projects, portfolios, products, tasks, bugs, agile workflows, roadmaps, and team collaboration in a single platform. OpenProject can be self hosted and is designed for organizations looking for an open source enterprise ready alternative to tools such as Jira, MS Project, Monday, Asana, YouTrack while maintaining full control over their data and infrastructure…
read the full OpenProject overview →
About treesheets
Welcome to the TreeSheets productivity tool! ============================================ TreeSheets is a "hierarchical spreadsheet" that is a great replacement for spreadsheets, mind mappers, outliners, PIMs, text editors and small databases. Suitable for any kind of data organization, such as todo lists, calendars, project management, brainstorming, organizing ideas, planning, requirements gathering, presentation of information, etc. It's like a spreadsheet, immediately familiar, but much more suitable for complex data because it's hierarchical. It's like a mind mapper, but more organized and compact. It's…
read the full treesheets overview →
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Frequently asked questions
Is OpenProject or treesheets more popular?
OpenProject has 16,631 GitHub stars and treesheets has 3,170. OpenProject has the larger community by that measure.
Are OpenProject and treesheets free?
Both are open source. OpenProject is licensed under GPL-3.0 and treesheets under Zlib. Neither carries a licence fee.
What is the difference between OpenProject and treesheets?
OpenProject is written in Ruby and treesheets 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 treesheets?
Choose OpenProject if you want the larger community (16,631 stars) or its GPL-3.0 licence terms. Choose treesheets if its feature set, stack or Zlib licence fits better. Both are self-hostable.