head to head · open source
humanizer vs CL4R1T4S
humanizer has 50,313 GitHub stars, 4,058 forks, 13 open issues and last shipped 14 days ago. CL4R1T4S has 50,059 stars, 10,280 forks, 127 open issues and last shipped 10 days ago. humanizer leads on adoption by 1% (50,313 vs 50,059 stars). humanizer is written in Python under MIT; CL4R1T4S is written in various languages under AGPL-3.0. humanizer has attracted 8% as many forks as stars, CL4R1T4S 21%. CL4R1T4S 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.
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Side by side
| humanizer | CL4R1T4S | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 50K |
| License | MIT | AGPL-3.0 |
| Written in | Python | — |
| Last push | 2026-09-06 | 2026-09-10 |
| Forks | ⑂ 4.1K | ⑂ 10K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick humanizer if
- You weight community size — 50K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick CL4R1T4S if
- You want the CL4R1T4S feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- You evaluated both and CL4R1T4S fits your workflow better
About humanizer
Humanizer is an MIT licensed agent skill that rewrites AI sounding text so it reads like a person wrote it without changing what it says, and it is aimed at writers, developers, and documentation teams working inside Claude Code, Codex, Cursor, or any other agent that supports skills.
read the full humanizer overview →
About CL4R1T4S
CL4R1T4S is an AGPL 3.0 repository of full extracted system prompts, guidelines and tools from the major AI models and agents — ChatGPT, Claude, Gemini, Grok, Perplexity, Cursor, Lovable, Replit and more — for anyone who wants to know what instructions sit behind the AI systems they use.
read the full CL4R1T4S overview →
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Frequently asked questions
Is humanizer or CL4R1T4S more popular?
humanizer has 50,313 GitHub stars and CL4R1T4S has 50,059. humanizer has the larger community by that measure.
Are humanizer and CL4R1T4S free?
Both are open source. humanizer is licensed under MIT and CL4R1T4S under AGPL-3.0. Neither carries a licence fee.
What is the difference between humanizer and CL4R1T4S?
humanizer is written in Python and CL4R1T4S in various languages. 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 CL4R1T4S?
Choose humanizer if you want the larger community (50,313 stars) or its MIT licence terms. Choose CL4R1T4S if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.