Best ClusterFuzz Alternatives in 2026
Updated
20 platforms from fuzz testing software ranked against ClusterFuzz on the same published basis.
- 1ClusterFuzz vs Mayhem
- 2ClusterFuzz vs cargo-fuzz
- 4ClusterFuzz vs AFL++
- 5ClusterFuzz vs Jazzer
- 6ClusterFuzz vs Accessibility Test Framework for Android
- 7ClusterFuzz vs boofuzz
- 8ClusterFuzz vs Fuzzilli
- 9ClusterFuzz vs OSS-Fuzz
- 10ClusterFuzz vs Schemathesis
- 11ClusterFuzz vs Csmith
- 12ClusterFuzz vs Roslynator
- 13ClusterFuzz vs Black Duck Coverity
- 14ClusterFuzz vs FuzzForge
- 15ClusterFuzz vs Honggfuzz
- 16ClusterFuzz vs Onyx Launcher
- 17ClusterFuzz vs syzkaller
- 18ClusterFuzz vs Scout Suite
- 19ClusterFuzz vs Fortra ZTNA
- 20ClusterFuzz vs Fuzzinator
- 21ClusterFuzz vs Fuzzware
ClusterFuzz alternatives compared
| # | Platform | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Mayhem | 7.9 | Free plan | $236/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 2 | cargo-fuzz | 7.4 | Free plan | Free | Linux, Mac, Windows |
| 4 | AFL++ | 7.3 | Free plan | €1666.67/mo | Android, Linux, Mac, self-hosted, Windows |
| 5 | Jazzer | 7.2 | Free plan | Free | Linux, Mac, Windows |
| 6 | Accessibility Test Framework for Android | 7.1 | Free plan | Free | Android, Linux, Mac, Windows |
| 7 | boofuzz | 7.0 | Free plan | Free | API, Linux, self-hosted, Windows |
| 8 | Fuzzilli | 7.0 | Free plan | Free | Linux, Mac, self-hosted |
| 9 | OSS-Fuzz | 7.0 | Free plan | Free | Web |
| 10 | Schemathesis | 7.0 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 11 | Csmith | 6.8 | Free plan | Free | Linux, Windows |
| 12 | Roslynator | 6.8 | Free plan | Free | Browser, Linux, Mac, Windows |
| 13 | Black Duck Coverity | 6.5 | No | — | Linux, Mac, self-hosted, Web, Windows |
| 14 | FuzzForge | 6.2 | No | — | self-hosted, Web |
| 15 | Honggfuzz | 6.2 | No | — | Android, Linux, Mac, Windows |
| 16 | Onyx Launcher | 6.0 | No | — | Windows, Linux |
| 17 | syzkaller | 6.0 | No | — | Linux, Mac, Windows |
| 18 | Scout Suite | 5.9 | No | — | Mac, Linux |
| 19 | Fortra ZTNA | 5.8 | No | — | Web |
| 20 | Fuzzinator | 5.8 | No | — | Linux, Mac |
| 21 | Fuzzware | 5.8 | No | — | Linux |
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Questions about ClusterFuzz alternatives
What is the best alternative to ClusterFuzz?
Mayhem, number 1 in fuzz testing software with a score of 7.9 out of 10. The others here: cargo-fuzz, AFL++, Jazzer and 16 more.
What is the best free alternative to ClusterFuzz?
Mayhem is the best-ranked alternative with a free plan. 11 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on.