head to head · open source
iFixAi vs h5i
iFixAi has 15,364 GitHub stars, 1,336 forks, 2 open issues and last shipped 2 days ago. h5i has 647 stars, 64 forks, 9 open issues and last shipped yesterday. iFixAi leads on adoption by 2,275% (15,364 vs 647 stars). iFixAi is written in Python under Apache-2.0; h5i is written in Rust under Apache-2.0. iFixAi has attracted 9% as many forks as stars, h5i 10%. 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 | ★ 15K | ★ 647 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Rust |
| Last push | 2026-09-16 | 2026-09-17 |
| Forks | ⑂ 1.3K | ⑂ 64 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick iFixAi if
- You weight community size — 15K 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 is an open source Python auditor that answers, in under 120 seconds, whether an AI agent is actually doing the job it is supposed to do — run either by a human operator or by the agent itself.
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 memor…
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Frequently asked questions
Is iFixAi or h5i more popular?
iFixAi has 15,364 GitHub stars and h5i has 647. 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 (15,364 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.