Mayhem vs ClusterFuzz

Mayhem9.4Visit ClusterFuzz8.9Visit

Higher score Mayhem #1 in Fuzz Testing Software 9.4/10 Pricing on request · 30-day trial Free trial✓ 3 of 3 features Visit Mayhem

vs

ClusterFuzz #3 in Fuzz Testing Software 8.9/10 Open source ✓ 3 of 3 features Visit ClusterFuzz

• Mayhem fits best

  Teams needing broad managed fuzz testing

• ClusterFuzz fits best

  Organizations needing managed fuzzing infrastructure

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Side by side

Feature	Mayhem 9.4/10 Visit ↗	ClusterFuzz 8.9/10 Visit ↗
At a glance
Editor score	9.4	8.9
Ranking	#1 in Fuzz Testing Software	#3 in Fuzz Testing Software
Best for	Teams needing broad managed fuzz testing	Organizations needing managed fuzzing infrastructure
Pricing model	Paid	Free
Starting price	Pricing on request · 30-day trial	Open source
Free plan	Not checked yet	Not checked yet
Free trial	30 days	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Web, Windows, macOS, Linux	Web, Windows, macOS, Linux
Support	Docs	Docs, Community
Integrations	9 integrations	5 integrations
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Mayhem 3/3 · ClusterFuzz 3/3
Coverage guidance	✓	✓
Crash triage	✓	✓
CI/CD support	✓	✓
Specs
Input generation methods	hybrid	mutation, generation, hybrid
Target types	Linux binaries; Windows PE binaries; TCP/UDP applications; REST APIs; gRPC APIs; containers; automotive vECUs	binary formats, HTML, JavaScript, browser DOM, native programs
Execution mode	Hybrid	Hybrid
Supported languages	C/C++; Python; Go; Rust; Java	C, C++, Rust; potentially other LLVM-based languages
Our review
Pros	Combines coverage-guided fuzzing with symbolic execution and hybrid targets Automates crash triage with proof-of-vulnerability reproduction commands Supports CI workflows, regression testing, and broad target coverage	Combines libFuzzer, AFL++, Honggfuzz, and black-box fuzzing Automates crash triage, deduplication, minimization, and issue filing Supports coverage management, regression bisection, and scheduled bots
Cons	Pricing requires contacting sales Broad functionality may exceed the needs of narrowly focused teams Configuration and workflow design may require security expertise	Requires organizations to operate the fuzzing infrastructure Cloud deployment can introduce usage costs outside the license Best fit is technical teams running continuous fuzzing programs
Our verdict	Mayhem is an AI-driven application security testing platform for development and security teams. It is designed for organizations that need continuous fuzz testing across software, APIs, binaries, containers, connected systems, and… Read the review →	ClusterFuzz is open-source fuzzing infrastructure from Google for development and security teams that need to operate continuous testing programs. It supports coverage-guided fuzzing with libFuzzer, AFL++, and Honggfuzz, alongside… Read the review →

Strengths and trade-offs

• Mayhem — where it wins

  • Combines coverage-guided fuzzing with symbolic execution and hybrid targets
  • Automates crash triage with proof-of-vulnerability reproduction commands
  • Supports CI workflows, regression testing, and broad target coverage

  Where it doesn't

  • Pricing requires contacting sales
  • Broad functionality may exceed the needs of narrowly focused teams
  • Configuration and workflow design may require security expertise

• ClusterFuzz — where it wins

  • Combines libFuzzer, AFL++, Honggfuzz, and black-box fuzzing
  • Automates crash triage, deduplication, minimization, and issue filing
  • Supports coverage management, regression bisection, and scheduled bots

  Where it doesn't

  • Requires organizations to operate the fuzzing infrastructure
  • Cloud deployment can introduce usage costs outside the license
  • Best fit is technical teams running continuous fuzzing programs

• Mayhem9.4/10 · Pricing on request · 30-day trial

  Mayhem brings broad hybrid fuzz testing, triage, and regression coverage to CI workflows.

  Visit MayhemFull verdict →
• ClusterFuzz8.9/10 · Open source

  A broad, self-managed fuzzing platform for continuous security and stability testing.

  Visit ClusterFuzzFull verdict →