head to head · open source
nono vs PyRIT
nono has 4,806 GitHub stars, 326 forks, 201 open issues and last shipped yesterday. PyRIT has 4,731 stars, 1,012 forks, 281 open issues and last shipped today. nono leads on adoption by 2% (4,806 vs 4,731 stars). nono is written in Rust under Apache-2.0; PyRIT is written in Python under MIT. nono has attracted 7% as many forks as stars, PyRIT 21%. PyRIT was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (ai-security, ai-security-tool, 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 | PyRIT | |
|---|---|---|
| GitHub stars | ★ 4.8K | ★ 4.7K |
| License | Apache-2.0 | MIT |
| Written in | Rust | Python |
| Last push | 2026-11-02 | 2026-11-03 |
| Forks | ⑂ 326 | ⑂ 1.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick nono if
- You weight community size — 4.8K 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 PyRIT if
- You want the PyRIT feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and PyRIT fits your workflow better
About nono
Built by the team that brought you Sigstore The standard for secure software attestation, used by PyPI, npm, brew, and Maven Central [!NOTE] In the lead up to a 1.0 release, APIs are stabilizing. API changes may still occur where necessary, but will be kept to a minimum. [!IMPORTANT] Organization migration: The official nono registry namespace has moved from always further to nolabs ai . Update any references in your scripts, profiles, and CI. If you already have a pack installed under the old namespace, remove it first before pulling from the new one: The old namespace will be retired — migrate now. Run AI…
About PyRIT
Python Risk Identification Tool for generative AI (PyRIT) The Python Risk Identification Tool for generative AI (PyRIT) is an open source framework built to empower security professionals and engineers to proactively identify risks in generative AI systems. Check out our website for more information about how to use, install, or contribute to PyRIT. Review our security policy to report vulnerabilities privately through the Microsoft Security Response Center. Visit our Discord server to chat with the team and community. Trademarks and Citations This project may contain trademarks or logos for projects, products…
read the full PyRIT overview →
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Frequently asked questions
Is nono or PyRIT more popular?
nono has 4,806 GitHub stars and PyRIT has 4,731. nono has the larger community by that measure.
Are nono and PyRIT free?
Both are open source. nono is licensed under Apache-2.0 and PyRIT under MIT. Neither carries a licence fee.
What is the difference between nono and PyRIT?
nono is written in Rust and PyRIT 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, nono or PyRIT?
Choose nono if you want the larger community (4,806 stars) or its Apache-2.0 licence terms. Choose PyRIT if its feature set, stack or MIT licence fits better. Both are self-hostable.