Mayhem vs syzkaller

Mayhem9.4Visit Ssyzkaller8.1Visit

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

S syzkaller #8 in Fuzz Testing Software 8.1/10 Open source ✓ 3 of 3 features Visit syzkaller

• Mayhem fits best

  Teams needing broad managed fuzz testing

• syzkaller fits best

  Operating-system kernel fuzzing

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Side by side

Feature	Mayhem 9.4/10 Visit ↗	Ssyzkaller 8.1/10 Visit ↗
At a glance
Editor score	9.4	8.1
Ranking	#1 in Fuzz Testing Software	#8 in Fuzz Testing Software
Best for	Teams needing broad managed fuzz testing	Operating-system kernel fuzzing
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	Self-hosted
Platforms	Web, Windows, macOS, Linux	Linux, Windows, macOS
Support	Docs	Community, Docs
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Mayhem 3/3 · syzkaller 3/3
Coverage guidance	✓	✓
Crash triage	✓	✓
CI/CD support	✓	✓
Specs
Input generation methods	hybrid	generation, mutation
Target types	Linux binaries; Windows PE binaries; TCP/UDP applications; REST APIs; gRPC APIs; containers; automotive vECUs	operating-system kernels and syscall interfaces: FreeBSD, Fuchsia, gVisor, Linux, NetBSD, OpenBSD, Windows
Execution mode	Hybrid	Local
Supported languages	C/C++; Python; Go; Rust; Java	Not checked yet
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	Generates and mutates syscall programs with coverage guidance Runs against virtual machines or physical devices Reproduces, minimizes, stores, and deduplicates kernel crashes
Cons	Pricing requires contacting sales Broad functionality may exceed the needs of narrowly focused teams Configuration and workflow design may require security expertise	Focused on operating-system kernels rather than general application fuzzing Requires teams able to build and instrument target kernels Local execution may demand kernel and device infrastructure
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 →	syzkaller is an open-source, unsupervised coverage-guided fuzzer for operating-system kernels. It generates and mutates syscall programs, executes them through virtual machines or physical devices, collects kernel code coverage, and… 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

• syzkaller — where it wins

  • Generates and mutates syscall programs with coverage guidance
  • Runs against virtual machines or physical devices
  • Reproduces, minimizes, stores, and deduplicates kernel crashes

  Where it doesn't

  • Focused on operating-system kernels rather than general application fuzzing
  • Requires teams able to build and instrument target kernels
  • Local execution may demand kernel and device infrastructure

• 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 →
• Ssyzkaller8.1/10 · Open source

  A focused open-source choice for coverage-guided operating-system kernel fuzzing.

  Visit syzkallerFull verdict →