head to head · open source
OpenProject vs Watson
OpenProject has 16,132 GitHub stars, 3,486 forks, 224 open issues and last shipped yesterday. Watson has 2,539 stars, 257 forks, 141 open issues and last shipped 9 months ago. OpenProject leads on adoption by 535% (16,132 vs 2,539 stars). OpenProject is written in Ruby under GPL-3.0; Watson is written in Python under MIT. OpenProject has attracted 22% as many forks as stars, Watson 10%. 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 | Watson | |
|---|---|---|
| GitHub stars | ★ 16K | ★ 2.5K |
| License | GPL-3.0 | MIT |
| Written in | Ruby | Python |
| Last push | 2026-09-17 | 2025-12-15 |
| Forks | ⑂ 3.5K | ⑂ 257 |
| 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 Watson if
- You want the Watson feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and Watson 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 Watson
Watson is a Python command line application for tracking time spent on projects and activities. It lives in the open source Python ecosystem, where it is distributed as td watson on PyPI and as watson through Homebrew on OS X. The tool records work as frames, and each frame can have a project name, tags, a start time, and a stop time.
read the full Watson overview →
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Frequently asked questions
Is OpenProject or Watson more popular?
OpenProject has 16,132 GitHub stars and Watson has 2,539. OpenProject has the larger community by that measure.
Are OpenProject and Watson free?
Both are open source. OpenProject is licensed under GPL-3.0 and Watson under MIT. Neither carries a licence fee.
What is the difference between OpenProject and Watson?
OpenProject is written in Ruby and Watson in Python. 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 Watson?
Choose OpenProject if you want the larger community (16,132 stars) or its GPL-3.0 licence terms. Choose Watson if its feature set, stack or MIT licence fits better. Both are self-hostable.