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Alternatives · 2026

The best beSTORM alternatives

The rest of Best Fuzz Testing Software, in this site's order: each with what it costs, where it runs and its record score.

1
Mayhem

Mayhem suits teams seeking code, API, and dynamic SBOM security testing in one platform.

WebWindowsMac+3 $236 a month Record5.6 Visit
2
AFL++

AFL++ suits developers and security teams working with supported target types who need coverage-guided fuzzing.

AndroidWindowsMac+2 €20,000 a year Record5.4 Visit
3
Jazzer

Jazzer suits developers who want to fuzz JVM applications or native libraries and integrate fuzz tests with JUnit or common build tools.

WindowsMacLinux+2 Free plan Record5.4 Visit
4
ClusterFuzz

ClusterFuzz suits software teams that need automated fuzzing and crash triage across Linux, macOS, or Windows.

WebWindowsMac+2 Free plan Record5.0 Visit
5
cargo-fuzz

Rust developers who want to find bugs in code through local fuzzing may find cargo-fuzz useful.

WindowsMacLinux Free plan Record4.9 Visit
6
EvoMaster

It suits developers and testers working with web, enterprise, REST, GraphQL, or RPC applications.

WindowsMacLinux+2 Free plan Record4.9 Visit
7
EvoMaster

EvoMaster suits developers and teams who need automated API testing across REST, GraphQL, or RPC interfaces.

WindowsMacLinux+2 Free plan Record4.9 Visit
8
Fuzzinator

Fuzzinator suits developers and testers who need locally scheduled fuzzing across multiple targets and generators.

WebWindowsMac+1 Free plan Record4.8 Visit
9
Schemathesis

Schemathesis suits engineers testing OpenAPI or GraphQL APIs and incorporating checks into CI/CD.

WindowsMacLinux+1 Free plan Record4.8 Visit
10
boofuzz

boofuzz suits developers building Python scripts to test network protocols and other communication targets.

WindowsLinuxAPI+1 Free plan Record4.7 Visit
11
Fuzzilli

Fuzzilli is for developers and security practitioners working on dynamic language interpreters and JavaScript engines.

MacLinuxSelf-hosted Free plan Record4.7 Visit
12
Netzob

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

WindowsLinux Free plan Record4.7 Visit
13
Onyx Launcher

Onyx suits Minecraft players on Windows or Linux who want separate instances, mod-loader support, Modrinth access, Java management, and diagnostic…

WindowsLinux Free plan Record4.7 Visit
14 WindowsMacLinux+1 Free plan Record4.6 Visit
15
Csmith

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

WindowsLinux Free plan Record4.5 Visit
16 Web Free plan Record4.5 Visit
17 WebSelf-hosted Free plan Record4.3 Visit
18
Black Duck Coverity

Coverity suits organizations that need static code analysis across large codebases, including teams working with compliance or safety standards.

WebWindowsMac+2 — Record4.1 Visit
19 WebLinuxAPI+1 — Record3.9 Visit
20 Linux — Record3.7 Visit
21 WindowsMacLinux Free plan Record3.2 Visit
22
Honggfuzz

Honggfuzz suits developers who need local, mutation-based input generation for files, APIs, binaries, network servers, or other listed targets.

AndroidWindowsMac+1 — Record3.1 Visit
23 Free plan Record2.6 Visit
24 WindowsMacLinux — Record2.6 Visit