head to head · open source
iFixAi vs h5i
iFixAi has 43,018 GitHub stars, 1,780 forks, 2 open issues and last shipped yesterday. h5i has 887 stars, 77 forks, 9 open issues and last shipped yesterday. iFixAi leads on adoption by 4,750% (43,018 vs 887 stars). iFixAi is written in Python under Apache-2.0; h5i is written in Rust under Apache-2.0. iFixAi has attracted 4% as many forks as stars, h5i 9%. h5i was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai-safety), 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
| iFixAi | h5i | |
|---|---|---|
| GitHub stars | ★ 43K | ★ 887 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Rust |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 1.8K | ⑂ 77 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick iFixAi if
- You weight community size — 43K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- 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 iFixAi
iFixAi English · 简体中文 · 日本語 · 한국어 Independent Auditing of AI Agents Catch your agent's mistakes and blind spots before the shit hits the fan. Quick start • Three ways to run • Test your agent • Scoring • Docs • Contributing One ifixai run , end to end: guided setup picks the system, judge, and suite; the run verifies the connection and saves your config; 32 inspections execute across five pillars; and the result lands as an A–F grade with a scored core pillar scorecard. What it is The existing Eval, Red teaming, and Observability Tools are evaluating the agent mainly based on tech capability (token efficiency…
read the full iFixAi 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 iFixAi or h5i more popular?
iFixAi has 43,018 GitHub stars and h5i has 887. iFixAi has the larger community by that measure.
Are iFixAi and h5i free?
Both are open source. iFixAi is licensed under Apache-2.0 and h5i under Apache-2.0. Neither carries a licence fee.
What is the difference between iFixAi and h5i?
iFixAi is written in Python 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, iFixAi or h5i?
Choose iFixAi if you want the larger community (43,018 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.