Side by side
ClusterFuzz vs Jazzer
Both stand on fuzz testing software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacSelf-hosted+2
ClusterFuzz covers crash discovery through fix verification, with automation for testcase handling and bug workflows. Its deployment dependencies and Monorail limitation are important to account for before adopting it.
Visit ClusterFuzz Free plan Open source APILinuxMac+2
Jazzer combines coverage-guided fuzzing with JUnit integration and security-focused sanitizers for JVM targets. Its listed platform support and JUnit version requirement are worth checking against a project’s setup.
Visit JazzerThe facts
| ClusterFuzz | Jazzer | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Yes |
| Runs on | Linux, Mac, Self-hosted, Web, Windows | API, Linux, Mac, Self-hosted, Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 2 |
| Maker | Not published | Not published |
| Website | google.github.io | github.com |
| On fuzz testing software | #4 of 26 | #1 of 26 |
ClusterFuzz: what it does well
- Supports libFuzzer, AFL++, and Honggfuzz.
- Can minimize testcases and bisect regressions.
- Automates bug filing, triage, and closure.
- Free and Apache-2.0 licensed.
What to know first
- Production deployments depend on Google Cloud services.
- Local instances are supported only on Linux and macOS.
- Architecture currently supports Chromium-hosted Monorail only.
Jazzer: what it does well
- JUnit integration supports fuzz tests alongside unit tests.
- Built-in sanitizers flag several Java security issues.
- Works with Maven, Gradle, and Bazel.
- Supports Linux, macOS, and Windows.
- Free under Apache-2.0.
What to know first
- JUnit integration requires JUnit 5.9.0 or newer.
- Windows support is limited to x86_64.
- macOS support requires version 12 or later.
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