ClusterFuzz vs syzkaller
| ClusterFuzz | syzkaller | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Linux, macOS, self-hosted, Web, Windows | Linux, macOS, Windows |
| Input generation methods | mutation, generation, hybrid | generation, mutation |
| Target types | binary formats, HTML, JavaScript, browser DOM, native programs | operating-system kernels and syscall interfaces: FreeBSD, Fuchsia, gVisor, Linux, NetBSD, OpenBSD, Windows |
| Coverage guidance | Yes | Yes |
| Crash triage | Yes | Yes |
| Execution mode | hybrid | local |
| Supported languages | C, C++, Rust; potentially other LLVM-based languages | — |
| CI/CD support | Yes | Yes |
Both are listed in Best Fuzz Testing Software. On The Geeks Club, ClusterFuzz scores higher on our published basis.