head to head · open source
lerna vs PolyglotPDF
lerna has 36,041 GitHub stars, 2,269 forks, 287 open issues and last shipped 3 days ago. PolyglotPDF has 1,324 stars, 198 forks, 14 open issues and last shipped 1.1 years ago. lerna leads on adoption by 2,622% (36,041 vs 1,324 stars). lerna is written in TypeScript under MIT; PolyglotPDF is written in Python under GPL-3.0. lerna has attracted 6% as many forks as stars, PolyglotPDF 15%. lerna 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
| lerna | PolyglotPDF | |
|---|---|---|
| GitHub stars | ★ 36K | ★ 1.3K |
| License | MIT | GPL-3.0 |
| Written in | TypeScript | Python |
| Last push | 2026-10-31 | 2025-09-28 |
| Forks | ⑂ 2.3K | ⑂ 198 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick lerna if
- You weight community size — 36K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick PolyglotPDF if
- You want the PolyglotPDF feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Python
- You evaluated both and PolyglotPDF fits your workflow better
About lerna
Important note: this project changed stewardship to Nx! Your favorite tool is alive and well: Lerna is a fast, modern build system for managing and publishing multiple JavaScript/TypeScript packages from the same repository. A few links to help you get started: lerna.js.org: Documentation, Guides, Interactive Tutorials Getting Started Features Official Nx and Lerna YouTube Channel Blog Posts About Lerna and Nx Engage with the Core Team and the Community Follow Lerna on Twitter Community Discord, forum channel Want to help? If you want to file a bug or submit a PR, read up on our guidelines for contributing Core…
read the full lerna overview →
About PolyglotPDF
python包在2.2版本之前预计不会更新，2.2版本预估采取解析最底层span获取更信息的布局逻辑解决，预估解决：行内公式错误判断为公式块，错误将粗体文本进行分段bug,以及insert html方法重复嵌入字体文件导致处理页数较大pdf时浪费计算资源极其卡顿。 目前效果，对于基于文本的pdf,polyglotpdf的解析方式依旧是最优解。 ocr和布局分析并不总是完美。（考虑处理文本上下标问题，大部分pdf文件中上标下标文本通过指定坐标和字体大小实现伪上下标，考虑替换为真正的上下标文字对应的Unicode编码，但并不完美），对于报告型表格文档，polyglotpdf效果相当完美，当然表格中的复杂矢量数学公式依旧无法正确处理）。 寻求意见的改进方法，对于复杂的颜色布局文本或者粗体参杂常规字体文本，提出以下方法，对于流内容我们可以解析为html格式如下： ABSTRACT: The swine industry annually suffers significant economic losses caused by porcine reproductive and respiratory syndrome virus (PRRSV). Because the available commercial vaccines have limited protective efficacy against epidemic…
read the full PolyglotPDF overview →
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Frequently asked questions
Is lerna or PolyglotPDF more popular?
lerna has 36,041 GitHub stars and PolyglotPDF has 1,324. lerna has the larger community by that measure.
Are lerna and PolyglotPDF free?
Both are open source. lerna is licensed under MIT and PolyglotPDF under GPL-3.0. Neither carries a licence fee.
What is the difference between lerna and PolyglotPDF?
lerna is written in TypeScript and PolyglotPDF 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, lerna or PolyglotPDF?
Choose lerna if you want the larger community (36,041 stars) or its MIT licence terms. Choose PolyglotPDF if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.