head to head · open source
codex-security vs arcjet-js
codex-security has 11,287 GitHub stars, 903 forks, 220 open issues and last shipped yesterday. arcjet-js has 698 stars, 35 forks, 11 open issues and last shipped 5 days ago. codex-security leads on adoption by 1,517% (11,287 vs 698 stars). codex-security is written in TypeScript under Apache-2.0; arcjet-js is written in TypeScript under Apache-2.0. codex-security has attracted 8% as many forks as stars, arcjet-js 5%. codex-security was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai-security, application-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
| codex-security | arcjet-js | |
|---|---|---|
| GitHub stars | ★ 11K | ★ 698 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 903 | ⑂ 35 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick codex-security if
- You weight community size — 11K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches TypeScript
- 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 codex-security
Codex Security @openai/codex security is a CLI and TypeScript SDK for defining security policy and finding, validating, and fixing security vulnerabilities in your code. 👉👉 See the Codex Security documentation for full documentation. Some cybersecurity requests and protected findings require approval through Trusted Access for Cyber. To join the program, visit chatgpt.com/cyber. Quick start Requires Node.js 22.13.0 or later and Python 3.10 or later. For CI, set OPENAI API KEY instead of signing in. Generate SECURITY.md Draft repository wide or component scoped SECURITY.md guidance for future scans: The command…
read the full codex-security overview →
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 codex-security or arcjet-js more popular?
codex-security has 11,287 GitHub stars and arcjet-js has 698. codex-security has the larger community by that measure.
Are codex-security and arcjet-js free?
Both are open source. codex-security is licensed under Apache-2.0 and arcjet-js under Apache-2.0. Neither carries a licence fee.
What is the difference between codex-security and arcjet-js?
codex-security is written in TypeScript 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, codex-security or arcjet-js?
Choose codex-security if you want the larger community (11,287 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.