head to head · open source
nono vs safelabs-eval
nono has 4,454 GitHub stars, 299 forks, 201 open issues and last shipped yesterday. safelabs-eval has 570 stars, 27 forks, 0 open issues and last shipped 3 days ago. nono leads on adoption by 681% (4,454 vs 570 stars). nono is written in Rust under Apache-2.0; safelabs-eval is written in Python under Apache-2.0. nono has attracted 7% as many forks as stars, safelabs-eval 5%. nono was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (agent-security, llm-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 | safelabs-eval | |
|---|---|---|
| GitHub stars | ★ 4.5K | ★ 570 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Python |
| Last push | 2026-10-11 | 2026-10-09 |
| Forks | ⑂ 299 | ⑂ 27 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick nono if
- You weight community size — 4.5K 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 safelabs-eval if
- You want the safelabs-eval feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and safelabs-eval 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 safelabs-eval
safelabs eval is an open source red teaming and evaluation framework for AI agent builders who need to test whether their agents resist adversarial prompts before production.
read the full safelabs-eval overview →
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Frequently asked questions
Is nono or safelabs-eval more popular?
nono has 4,454 GitHub stars and safelabs-eval has 570. nono has the larger community by that measure.
Are nono and safelabs-eval free?
Both are open source. nono is licensed under Apache-2.0 and safelabs-eval under Apache-2.0. Neither carries a licence fee.
What is the difference between nono and safelabs-eval?
nono is written in Rust and safelabs-eval 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 safelabs-eval?
Choose nono if you want the larger community (4,454 stars) or its Apache-2.0 licence terms. Choose safelabs-eval if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.