Best OSS-Fuzz Alternatives in 2026
Updated
20 tools from fuzz testing software ranked against OSS-Fuzz on the same published basis.
- 1OSS-Fuzz vs Mayhem
- 2OSS-Fuzz vs ClusterFuzz
- 3OSS-Fuzz vs AFL++
- 4OSS-Fuzz vs cargo-fuzz
- 5OSS-Fuzz vs Accessibility Test Framework for Android
- 6OSS-Fuzz vs Jazzer
- 7OSS-Fuzz vs boofuzz
- 8OSS-Fuzz vs Fuzzilli
- 9OSS-Fuzz vs Schemathesis
- 10OSS-Fuzz vs Csmith
- 12OSS-Fuzz vs Roslynator
- 13OSS-Fuzz vs Black Duck Coverity
- 14OSS-Fuzz vs FuzzForge
- 15OSS-Fuzz vs Honggfuzz
- 16OSS-Fuzz vs syzkaller
- 17OSS-Fuzz vs Onyx Launcher
- 18OSS-Fuzz vs Fortra ZTNA
- 19OSS-Fuzz vs Scout Suite
- 20OSS-Fuzz vs Netzob
- 21OSS-Fuzz vs Wfuzz
OSS-Fuzz alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Mayhem | 7.8 | Free plan | $236/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 2 | ClusterFuzz | 7.6 | Free plan | Free | Linux, Mac, self-hosted, Web, Windows |
| 3 | AFL++ | 7.5 | Free plan | €1666.67/mo | Android, Linux, Mac, self-hosted, Windows |
| 4 | cargo-fuzz | 7.5 | Free plan | Free | Linux, Mac, Windows |
| 5 | Accessibility Test Framework for Android | 7.3 | Free plan | Free | Android, Linux, Mac, Windows |
| 6 | Jazzer | 7.2 | Free plan | Free | Linux, Mac, Windows |
| 7 | boofuzz | 7.1 | Free plan | Free | API, Linux, self-hosted, Windows |
| 8 | Fuzzilli | 7.1 | Free plan | Free | Linux, Mac, self-hosted |
| 9 | Schemathesis | 7.1 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 10 | Csmith | 6.9 | Free plan | Free | Linux, Windows |
| 12 | Roslynator | 6.9 | Free plan | Free | Browser, Linux, Mac, Windows |
| 13 | Black Duck Coverity | 6.8 | No | — | Linux, Mac, self-hosted, Web, Windows |
| 14 | FuzzForge | 6.4 | No | — | self-hosted, Web |
| 15 | Honggfuzz | 6.4 | No | — | Android, Linux, Mac, Windows |
| 16 | syzkaller | 6.2 | No | — | Linux, Mac, Windows |
| 17 | Onyx Launcher | 6.1 | No | — | Windows, Linux |
| 18 | Fortra ZTNA | 6.0 | No | — | Web |
| 19 | Scout Suite | 6.0 | No | — | Mac, Linux |
| 20 | Netzob | 5.9 | No | — | Linux, Windows |
| 21 | Wfuzz | 5.9 | No | — | Windows, Mac |
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Questions about OSS-Fuzz alternatives
What is the best alternative to OSS-Fuzz?
Mayhem, number 1 in fuzz testing software with a score of 7.8 out of 10. The others here: ClusterFuzz, AFL++, cargo-fuzz and 16 more.
What is the best free alternative to OSS-Fuzz?
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 what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.