Best syzkaller Alternatives in 2026
Updated
20 platforms from fuzz testing software ranked against syzkaller on the same published basis.
- 1syzkaller vs Mayhem
- 2syzkaller vs cargo-fuzz
- 3syzkaller vs ClusterFuzz
- 4syzkaller vs AFL++
- 5syzkaller vs Jazzer
- 6syzkaller vs Accessibility Test Framework for Android
- 7syzkaller vs EvoMaster
- 8syzkaller vs boofuzz
- 9syzkaller vs Fuzzilli
- 10syzkaller vs Netzob
- 11syzkaller vs OSS-Fuzz
- 12syzkaller vs Schemathesis
- 13syzkaller vs Csmith
- 14syzkaller vs EvoMaster
- 15syzkaller vs Onyx Launcher
- 16syzkaller vs Roslynator
- 17syzkaller vs Scout Suite
- 18syzkaller vs Wfuzz
- 19syzkaller vs Fortra ZTNA
- 20syzkaller vs Black Duck Coverity
syzkaller 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 |
| 3 | ClusterFuzz | 7.4 | Free plan | Free | Linux, Mac, self-hosted, Web, 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 | EvoMaster | 7.1 | Free plan | Free | API, Linux, Mac, self-hosted, Windows |
| 8 | boofuzz | 7.0 | Free plan | Free | API, Linux, self-hosted, Windows |
| 9 | Fuzzilli | 7.0 | Free plan | Free | Linux, Mac, self-hosted |
| 10 | Netzob | 7.0 | Free plan | Free | Linux, Windows |
| 11 | OSS-Fuzz | 7.0 | Free plan | Free | Web |
| 12 | Schemathesis | 7.0 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 13 | Csmith | 6.8 | Free plan | Free | Linux, Windows |
| 14 | EvoMaster | 6.8 | Free plan | Free | API, Linux, Mac, self-hosted, Windows |
| 15 | Onyx Launcher | 6.8 | Free plan | Free | Linux, Windows |
| 16 | Roslynator | 6.8 | Free plan | Free | Browser, Linux, Mac, Windows |
| 17 | Scout Suite | 6.8 | Free plan | Free | Linux, Mac, self-hosted |
| 18 | Wfuzz | 6.8 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 19 | Fortra ZTNA | 6.6 | No | — | Android, iOS, Linux, Mac, self-hosted, Web, Windows |
| 20 | Black Duck Coverity | 6.5 | No | — | Linux, Mac, self-hosted, Web, Windows |
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Questions about syzkaller alternatives
What is the best alternative to syzkaller?
Mayhem, number 1 in fuzz testing software with a score of 7.9 out of 10. The others here: cargo-fuzz, ClusterFuzz, AFL++ and 16 more.
What is the best free alternative to syzkaller?
Mayhem is the best-ranked alternative with a free plan. 18 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.