head to head · open source
codex-security vs FuzzyAI
codex-security has 10,750 GitHub stars, 797 forks, 220 open issues and last shipped yesterday. FuzzyAI has 1,574 stars, 216 forks, 7 open issues and last shipped 7 months ago. codex-security leads on adoption by 583% (10,750 vs 1,574 stars). codex-security is written in TypeScript under Apache-2.0; FuzzyAI is written in Jupyter Notebook under Apache-2.0. codex-security has attracted 7% as many forks as stars, FuzzyAI 14%. codex-security 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
| codex-security | FuzzyAI | |
|---|---|---|
| GitHub stars | ★ 11K | ★ 1.6K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | TypeScript | Jupyter Notebook |
| Last push | 2026-09-17 | 2026-02-06 |
| Forks | ⑂ 797 | ⑂ 216 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick codex-security if
- You weight community size — 11K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick FuzzyAI if
- You want the FuzzyAI feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Jupyter Notebook
- You evaluated both and FuzzyAI fits your workflow better
About codex-security
Codex Security is OpenAI's command line tool and TypeScript SDK, published on npm as @openai/codex security , that finds, validates, and fixes security vulnerabilities in a codebase, and it serves application security engineers, DevSecOps teams, and developers who want that scanning to run from their own terminal or CI.
read the full codex-security overview →
About FuzzyAI
FuzzyAI is an open source fuzzer for large language model APIs. It lives in the AI security and red teaming ecosystem. It uses automated prompt mutation to test whether a model or API accepts jailbreak attempts. The project helps developers and security researchers find, evaluate, and reduce exposure to harmful or unwanted model behavior.
read the full FuzzyAI overview →
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Frequently asked questions
Is codex-security or FuzzyAI more popular?
codex-security has 10,750 GitHub stars and FuzzyAI has 1,574. codex-security has the larger community by that measure.
Are codex-security and FuzzyAI free?
Both are open source. codex-security is licensed under Apache-2.0 and FuzzyAI under Apache-2.0. Neither carries a licence fee.
What is the difference between codex-security and FuzzyAI?
codex-security is written in TypeScript and FuzzyAI in Jupyter Notebook. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, codex-security or FuzzyAI?
Choose codex-security if you want the larger community (10,750 stars) or its Apache-2.0 licence terms. Choose FuzzyAI if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.