head to head · open source
nono vs FuzzyAI
nono has 4,140 GitHub stars, 274 forks, 201 open issues and last shipped 2 days ago. FuzzyAI has 1,576 stars, 217 forks, 7 open issues and last shipped 8 months ago. nono leads on adoption by 163% (4,140 vs 1,576 stars). nono is written in Rust under Apache-2.0; FuzzyAI is written in Jupyter Notebook under Apache-2.0. nono has attracted 7% as many forks as stars, FuzzyAI 14%. nono was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (llm-security, security), 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
| nono | FuzzyAI | |
|---|---|---|
| GitHub stars | ★ 4.1K | ★ 1.6K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Jupyter Notebook |
| Last push | 2026-09-18 | 2026-02-06 |
| Forks | ⑂ 274 | ⑂ 217 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick nono if
- You weight community size — 4.1K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- 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 nono
nono is a Rust project for secure multiplexed execution paths for AI agents. It lives in AI security and privacy. It is built by the team that brought Sigstore. It aims to run agents with zero trust, zero setup, and zero latency.
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 nono or FuzzyAI more popular?
nono has 4,140 GitHub stars and FuzzyAI has 1,576. nono has the larger community by that measure.
Are nono and FuzzyAI free?
Both are open source. nono is licensed under Apache-2.0 and FuzzyAI under Apache-2.0. Neither carries a licence fee.
What is the difference between nono and FuzzyAI?
nono is written in Rust 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, nono or FuzzyAI?
Choose nono if you want the larger community (4,140 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.