Mayhem vs OSS-Fuzz

Mayhem9.4Visit OSS-Fuzz9.2Visit

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

OSS-Fuzz #2 in Fuzz Testing Software 9.2/10 Free plan Free plan✓ 3 of 3 features Visit OSS-Fuzz

• Mayhem fits best

  Teams needing broad managed fuzz testing

• OSS-Fuzz fits best

  Free continuous fuzzing for open-source projects

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Side by side

Feature	Mayhem 9.4/10 Visit ↗	OSS-Fuzz 9.2/10 Visit ↗
At a glance
Editor score	9.4	9.2
Ranking	#1 in Fuzz Testing Software	#2 in Fuzz Testing Software
Best for	Teams needing broad managed fuzz testing	Free continuous fuzzing for open-source projects
Pricing model	Paid	Free
Starting price	Pricing on request · 30-day trial	Free plan
Free plan	Not checked yet	✓ (best)
Free trial	30 days	—
Deployment	Cloud, Self-hosted	Cloud
Platforms	Web, Windows, macOS, Linux	Web
Support	Docs	Docs, Community
Integrations	9 integrations	3 integrations
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Mayhem 3/3 · OSS-Fuzz 3/3
Coverage guidance	✓	✓
Crash triage	✓	✓
CI/CD support	✓	✓
Specs
Input generation methods	hybrid	mutation
Target types	Linux binaries; Windows PE binaries; TCP/UDP applications; REST APIs; gRPC APIs; containers; automotive vECUs	source-code fuzz targets; untrusted user or network inputs; complex input formats
Execution mode	Hybrid	Cloud
Supported languages	C/C++; Python; Go; Rust; Java	C/C++, Rust, Go, Python, Java/JVM, JavaScript, Lua
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	Distributed fuzzing with libFuzzer, AFL++, Honggfuzz, and Centipede Sanitizer workflows, coverage reports, and fuzzer statistics Crash deduplication, reproduction, bug filing, and regression reporting
Cons	Pricing requires contacting sales Broad functionality may exceed the needs of narrowly focused teams Configuration and workflow design may require security expertise	Limited to qualifying open-source projects Requires fuzz targets and build configurations for integration Cloud execution may not suit closed-source projects
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 →	OSS-Fuzz is a Google service for qualifying open-source projects that need continuous testing against untrusted user or network inputs and complex input formats. Maintainers integrate fuzz targets and build configurations, after which the… 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

• OSS-Fuzz — where it wins

  • Distributed fuzzing with libFuzzer, AFL++, Honggfuzz, and Centipede
  • Sanitizer workflows, coverage reports, and fuzzer statistics
  • Crash deduplication, reproduction, bug filing, and regression reporting

  Where it doesn't

  • Limited to qualifying open-source projects
  • Requires fuzz targets and build configurations for integration
  • Cloud execution may not suit closed-source projects

• 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 →
• OSS-Fuzz9.2/10 · Free plan

  A cloud-based continuous fuzzing service for qualifying open-source projects.

  Visit OSS-FuzzFull verdict →