head to head · open source
nono vs arcjet-js
nono has 4,841 GitHub stars, 327 forks, 201 open issues and last shipped yesterday. arcjet-js has 698 stars, 35 forks, 11 open issues and last shipped yesterday. nono leads on adoption by 594% (4,841 vs 698 stars). nono is written in Rust under Apache-2.0; arcjet-js is written in TypeScript under Apache-2.0. nono has attracted 7% as many forks as stars, arcjet-js 5%. nono was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 5 topic tags (agent-security, ai-agents, ai-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 | arcjet-js | |
|---|---|---|
| GitHub stars | ★ 4.8K | ★ 698 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | TypeScript |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 327 | ⑂ 35 |
| 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 arcjet-js if
- You want the arcjet-js feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and arcjet-js 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 arcjet-js
Arcjet JS SDK [Arcjet][arcjet] is the runtime security platform that ships in your AI code. Detect prompt injection, authorize agent tool calls, redact sensitive data, and block bots and abuse. Real time security building blocks you call inside your app, before an action happens. This is the monorepo containing various [Arcjet][arcjet] open source packages for JS. Why Arcjet? Your app's AI features and agents take real actions, calling tools, reading data, hitting APIs. Arcjet runs inside that code and lets you enforce security on each action in real time, then audit what happened Which package do I need? Arcjet…
read the full arcjet-js overview →
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Frequently asked questions
Is nono or arcjet-js more popular?
nono has 4,841 GitHub stars and arcjet-js has 698. nono has the larger community by that measure.
Are nono and arcjet-js free?
Both are open source. nono is licensed under Apache-2.0 and arcjet-js under Apache-2.0. Neither carries a licence fee.
What is the difference between nono and arcjet-js?
nono is written in Rust and arcjet-js in TypeScript. 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 arcjet-js?
Choose nono if you want the larger community (4,841 stars) or its Apache-2.0 licence terms. Choose arcjet-js if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.