head to head · open source
humanizer vs outlines
humanizer has 64,488 GitHub stars, 5,085 forks, 13 open issues and last shipped 8 days ago. outlines has 16,002 stars, 910 forks, 166 open issues and last shipped 2 months ago. humanizer leads on adoption by 303% (64,488 vs 16,002 stars). humanizer is written in Python under MIT; outlines is written in Python under Apache-2.0. humanizer has attracted 8% as many forks as stars, outlines 6%. humanizer was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (prompt-engineering), 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.
← all 20902 open source comparisons
Side by side
| humanizer | outlines | |
|---|---|---|
| GitHub stars | ★ 64K | ★ 16K |
| License | MIT | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-10-28 | 2026-09-21 |
| Forks | ⑂ 5.1K | ⑂ 910 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick humanizer if
- You weight community size — 64K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick outlines if
- You want the outlines feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and outlines fits your workflow better
About humanizer
Humanizer Humanizer rewrites AI sounding text so it reads like a person wrote it, without changing what it says. Because it is just Markdown, it works with any agent that supports skills. Installation Install Humanizer with the Skills CLI: Leave off global to install Humanizer only in the current project. Add agent or agent ' ' to choose which agents receive it, then reload their skills. The skill answers to /humanizer . Claude Code 2.1.142 or newer can install the plugin instead: The plugin answers to /humanizer:humanizer . In Claude Desktop, download this repository as a ZIP and upload it as a skill. For a…
read the full humanizer overview →
About outlines
🗒️ Structured outputs for LLMs 🗒️ Made with ❤👷️ by the team at .txt Trusted by NVIDIA, Cohere, HuggingFace, vLLM, etc. [![PyPI Version][pypi version badge]][pypi] [![Downloads][downloads badge]][pypistats] [![Stars][stars badge]][stars] [![Discord][discord badge]][discord] [![Blog][dottxt blog badge]][dottxt blog] [![Twitter][twitter badge]][twitter] The .txt API is currently in early access. Request access here → 🚀 Building the future of structured generation We're working with select partners to develop new interfaces to structured generation. Need XML, FHIR, custom schemas or grammars? Let's talk. Audit…
read the full outlines overview →
More in AI & Machine Learning
Related comparisons
More AI Development Platforms projects
Compare either of these against the rest of the AI Development Platforms field.
Frequently asked questions
Is humanizer or outlines more popular?
humanizer has 64,488 GitHub stars and outlines has 16,002. humanizer has the larger community by that measure.
Are humanizer and outlines free?
Both are open source. humanizer is licensed under MIT and outlines under Apache-2.0. Neither carries a licence fee.
What is the difference between humanizer and outlines?
humanizer is written in Python and outlines 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, humanizer or outlines?
Choose humanizer if you want the larger community (64,488 stars) or its MIT licence terms. Choose outlines if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.