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Head-to-head · Fuzz Testing Software

AFL++ vs EvoMaster

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score AFL++ #4 in Fuzz Testing Software 8.7/10 Free plan Free plan✓ 3 of 3 features Visit AFL++
EvoMaster #5 in Fuzz Testing Software 8.5/10 Free plan Free plan✓ 0 of 3 features Visit EvoMaster

AFL++ leads on 0 checks, EvoMaster on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAFL++ · 8.7/10
  • Free planboth
  • Most featuresAFL++ · 3 of 3

AFL++ scores higher on our rubric for fuzz testing software: 8.7 against 8.5 out of 10; our editors rank them #4 and #5.

AFL++ is the better fit for general-purpose native and binary fuzzing. EvoMaster is the better fit for API teams testing REST, GraphQL, and RPC.

  • AFL++ fits best

    General-purpose native and binary fuzzing

  • EvoMaster fits best

    API teams testing REST, GraphQL, and RPC

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Side by side

Feature AFL++ 8.7/10 Visit ↗ EvoMaster 8.5/10 Visit ↗
At a glance
Editor score 8.7 8.5
Ranking #4 in Fuzz Testing Software #5 in Fuzz Testing Software
Best for General-purpose native and binary fuzzing API teams testing REST, GraphQL, and RPC
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Self-hosted, Desktop
Platforms Linux, macOS, Android, Windows Windows, macOS, Linux
Support Community, Docs Community, Docs
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features AFL++ 3/3 · EvoMaster 0/3
Coverage guidance ✓ (best) Not checked yet
Crash triage ✓ (best) Not checked yet
CI/CD support ✓ (best) Not checked yet
Specs
Input generation methods mutation Not checked yet
Target types source-code targets, binary-only targets, file inputs, stdin inputs, Android native libraries, Win32 PE binaries Not checked yet
Execution mode Local Not checked yet
Supported languages C, C++, Python, Rust Not checked yet
Our review
Pros
  • Supports source and binary-only fuzzing across four platforms
  • Combines persistent execution, custom mutators, and parallel fuzzing
  • Includes crash triage, minimization, dictionaries, and CI support
  • Supports REST, GraphQL, gRPC, and Thrift API testing
  • Generates tests in Python, JavaScript, Java, and Kotlin
  • Combines authentication, database data generation, and reporting
Cons
  • Local execution puts setup and operations on the user
  • Its primary focus is native programs and selected binary targets
  • Mutation-based input generation may not suit every testing strategy
  • White-box testing is focused on JVM applications
  • Database generation centers on four supported database systems
  • Continuous integration integration is provided through GitHub Actions
Our verdict

AFL++ is an open-source, coverage-guided fuzzer for developers and security researchers testing programs and libraries. It targets file-processing programs, command-line tools, native libraries, and selected binary targets. Supported…

Read the review →

EvoMaster is an open-source tool for automatically generating system-level tests and fuzzing web and enterprise applications. It is aimed at API teams working with REST, GraphQL, and RPC interfaces, including gRPC and Thrift. Its black-box…

Read the review →
  1. AFL++Fuzz Testing Software 8.7Free plan
  2. EvoMasterFuzz Testing Software 8.5Free plan

Strengths and trade-offs

  • AFL++ — where it wins

    • Supports source and binary-only fuzzing across four platforms
    • Combines persistent execution, custom mutators, and parallel fuzzing
    • Includes crash triage, minimization, dictionaries, and CI support

    Where it doesn't

    • Local execution puts setup and operations on the user
    • Its primary focus is native programs and selected binary targets
    • Mutation-based input generation may not suit every testing strategy

  • EvoMaster — where it wins

    • Supports REST, GraphQL, gRPC, and Thrift API testing
    • Generates tests in Python, JavaScript, Java, and Kotlin
    • Combines authentication, database data generation, and reporting

    Where it doesn't

    • White-box testing is focused on JVM applications
    • Database generation centers on four supported database systems
    • Continuous integration integration is provided through GitHub Actions

More comparisons

All fuzz testing software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update