head to head · open source
shannon vs FuzzyAI
shannon has 48,105 GitHub stars, 5,515 forks, 18 open issues and last shipped 10 days ago. FuzzyAI has 1,574 stars, 216 forks, 7 open issues and last shipped 7 months ago. shannon leads on adoption by 2,956% (48,105 vs 1,574 stars). shannon is written in TypeScript under AGPL-3.0; FuzzyAI is written in Jupyter Notebook under Apache-2.0. shannon has attracted 11% as many forks as stars, FuzzyAI 14%. shannon 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
| shannon | FuzzyAI | |
|---|---|---|
| GitHub stars | ★ 48K | ★ 1.6K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | TypeScript | Jupyter Notebook |
| Last push | 2026-09-08 | 2026-02-06 |
| Forks | ⑂ 5.5K | ⑂ 216 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick shannon if
- You weight community size — 48K stars and counting
- You want the AGPL-3.0 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 shannon
Shannon is an autonomous AI pentester for web applications and APIs that reads an application's source code, identifies attack paths, and executes real exploits so that only vulnerabilities with a working proof of concept are reported, built for AppSec, DevSecOps, and security engineering teams that ship code continuously.
read the full shannon 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 shannon or FuzzyAI more popular?
shannon has 48,105 GitHub stars and FuzzyAI has 1,574. shannon has the larger community by that measure.
Are shannon and FuzzyAI free?
Both are open source. shannon is licensed under AGPL-3.0 and FuzzyAI under Apache-2.0. Neither carries a licence fee.
What is the difference between shannon and FuzzyAI?
shannon 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, shannon or FuzzyAI?
Choose shannon if you want the larger community (48,105 stars) or its AGPL-3.0 licence terms. Choose FuzzyAI if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.