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Best Csmith Alternatives in 2026

12 platforms from fuzz testing software ranked against Csmith on the same published basis.

  1. 1
    Mayhem Free plan apiLinuxMacself-hostedWeb $236/mo7.3
    Csmith vs Mayhem
  2. 2
    cargo-fuzz Free plan LinuxMacWin Free6.0
    Csmith vs cargo-fuzz
  3. 3
    ClusterFuzz Free plan LinuxMacself-hostedWebWin Free6.0
    Csmith vs ClusterFuzz
  4. 4
    Fuzzilli Free plan LinuxMacself-hosted Free6.0
    Csmith vs Fuzzilli
  5. 5
    Accessibility Test Framework for Android Free plan AndroidLinuxMacWin Free5.9
    Csmith vs Accessibility Test Framework for Android
  6. 6
    AFL++ Free plan AndroidLinuxMacself-hostedWin €1666.67/mo5.9
    Csmith vs AFL++
  7. 7
    Jazzer Free plan LinuxMacWin Free5.9
    Csmith vs Jazzer
  8. 8
    OSS-Fuzz Free plan Web Free5.9
    Csmith vs OSS-Fuzz
  9. 9
    Roslynator Free plan extensionLinuxMacWin Free5.8
    Csmith vs Roslynator
  10. 10
    FuzzForge Web 5.6
    Csmith vs FuzzForge
  11. 11
    Onyx Launcher WinLinux 5.6
    Csmith vs Onyx Launcher
  12. 12
    boofuzz WinLinux 5.5
    Csmith vs boofuzz
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