Z-Jail

Lightweight multi-layer Linux sandbox for auditable native code execution, with no external dependencies.

Desktopfree

Z-Jail is an open-source, dependency-free Linux sandbox for running untrusted native code, combining namespaces, seccomp syscall whitelisting, and capability dropping into seven ordered isolation layers. It produces a tamper-evident, hash-chained JSON audit record for every run. It is designed for CI pipelines, CTF jail challenges, and other lightweight code-evaluation scenarios that need defense-in-depth without a full container runtime.

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Problem & pain-point mapping
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What it's a strong alternative to
Trust & credibility signals

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