Alternatives to AFL++

boofuzz suits developers building Python scripts to fuzz network protocols or other supported communication targets.

Jazzer suits developers testing JVM applications and related native libraries, particularly those using JUnit and Maven, Gradle, or Bazel.

Rust developers who want to fuzz-test crates locally or in a GitHub Actions workflow.

Fuzzilli suits developers and security researchers fuzzing JavaScript engines or other dynamic language interpreters.

Mayhem

Mayhem is suited to teams testing code, APIs and software components for security issues.

It suits teams generating automated API and system tests across web or enterprise applications.

EvoMaster suits teams that want to generate API tests for web or enterprise applications, including teams working with REST, GraphQL, or supported RPC APIs.

It suits Minecraft players on Windows or Linux who want instance management, mod catalog access and built-in diagnostics.

Black Duck Coverity

Coverity suits enterprise development teams that need static source-code analysis across languages and frameworks.

Csmith suits compiler developers and testers who need generated C programs for differential testing or test suites.

Fuzzinator suits developers who want to automate local fuzzing jobs and can configure generators, targets and storage.

Netzob suits security evaluators creating fuzzers for proprietary or undocumented protocols.

Schemathesis suits engineers testing OpenAPI or GraphQL APIs, especially those integrating API tests into CI/CD.