head to head · open source
codex-security vs h5i
codex-security has 11,282 GitHub stars, 901 forks, 220 open issues and last shipped yesterday. h5i has 887 stars, 77 forks, 9 open issues and last shipped 3 days ago. codex-security leads on adoption by 1,172% (11,282 vs 887 stars). codex-security is written in TypeScript under Apache-2.0; h5i is written in Rust under Apache-2.0. codex-security has attracted 8% as many forks as stars, h5i 9%. 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, cybersecurity), 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 | h5i | |
|---|---|---|
| GitHub stars | ★ 11K | ★ 887 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | TypeScript | Rust |
| Last push | 2026-11-02 | 2026-10-31 |
| Forks | ⑂ 901 | ⑂ 77 |
| 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 h5i if
- You want the h5i feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and h5i 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 h5i
The Red Teaming Browser for AI Agents h5i (pronounced high five ) is a lightweight browser built for AI agents to test web applications. It combines page automation with direct control over HTTP traffic, letting agents capture, inspect, modify, replay, and compare requests through one interface. Sandboxing, network policies, credential isolation, and auditable sessions keep autonomous testing contained and within scope. Agent native red teaming Browser + direct HTTP control Attack replay in CI Replay attack flows in CI Sandboxed & auditable Isolated execution with logs Fast & lightweight 3× faster, 86% less…
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Frequently asked questions
Is codex-security or h5i more popular?
codex-security has 11,282 GitHub stars and h5i has 887. codex-security has the larger community by that measure.
Are codex-security and h5i free?
Both are open source. codex-security is licensed under Apache-2.0 and h5i under Apache-2.0. Neither carries a licence fee.
What is the difference between codex-security and h5i?
codex-security is written in TypeScript and h5i in Rust. 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 h5i?
Choose codex-security if you want the larger community (11,282 stars) or its Apache-2.0 licence terms. Choose h5i if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.