head to head · open source
WritingTools vs yomiyasu
WritingTools has 2,463 GitHub stars, 163 forks, 79 open issues and last shipped 2 months ago. yomiyasu has 1,589 stars, 36 forks, 3 open issues and last shipped yesterday. WritingTools leads on adoption by 55% (2,463 vs 1,589 stars). WritingTools is written in Swift under GPL-3.0; yomiyasu is written in Python under MIT. WritingTools has attracted 7% as many forks as stars, yomiyasu 2%. yomiyasu was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (gemini, llm), so they are genuine substitutes rather than adjacent tools.
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
| WritingTools | yomiyasu | |
|---|---|---|
| GitHub stars | ★ 2.5K | ★ 1.6K |
| License | GPL-3.0 | MIT |
| Written in | Swift | Python |
| Last push | 2026-08-19 | 2026-10-06 |
| Forks | ⑂ 163 | ⑂ 36 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick WritingTools if
- You weight community size — 2.5K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Swift
- You value the larger contributor base for long-term maintenance
pick yomiyasu if
- You want the yomiyasu feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and yomiyasu fits your workflow better
About WritingTools
WritingTools is an open source, system wide writing assistant for Windows, Linux, and macOS. It is inspired by Apple Intelligence Writing Tools and uses cloud based or local large language models to proofread, rewrite, summarize, and transform selected text across applications. The project is written in Swift and released under the GPL 3.0 license. The README states it works in nearly any language.
read the full WritingTools overview →
About yomiyasu
yomiyasu is an Agent Skill that rewrites AI generated Japanese into natural, readable prose, for writers, engineers and editors who draft technical articles, design documents, pull request descriptions and internal reports with LLMs.
read the full yomiyasu overview →
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Frequently asked questions
Is WritingTools or yomiyasu more popular?
WritingTools has 2,463 GitHub stars and yomiyasu has 1,589. WritingTools has the larger community by that measure.
Are WritingTools and yomiyasu free?
Both are open source. WritingTools is licensed under GPL-3.0 and yomiyasu under MIT. Neither carries a licence fee.
What is the difference between WritingTools and yomiyasu?
WritingTools is written in Swift and yomiyasu 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, WritingTools or yomiyasu?
Choose WritingTools if you want the larger community (2,463 stars) or its GPL-3.0 licence terms. Choose yomiyasu if its feature set, stack or MIT licence fits better. Both are self-hostable.