Fuzze.rs vs OSS-Fuzz
When Google's open-source fuzzing service won't take your code, Fuzze.rs picks up where it leaves off.
OSS-Fuzz is excellent — for the open-source projects it accepts.
Fuzze.rs is the answer when your code is proprietary, your project hasn't been accepted, or you need fuzzing on your own schedule and infrastructure.
Both run AFL++, libFuzzer, Honggfuzz, and Centipede; the differences are in eligibility, control, and reporting.
Side-by-side
| Feature | Fuzze.rs | OSS-Fuzz | Edge |
|---|---|---|---|
| Codebase eligibility | Any (open-source or proprietary) | Open-source only, must be widely used | |
| Fuzzers supported | AFL++, libFuzzer, Centipede, Honggfuzz | AFL++, libFuzzer, Honggfuzz, Centipede | |
| Crash disclosure timeline | Private to your team unless you publish | Public after 90 days (default) | |
| Dashboard / reporting | Per-project private dashboard with REST API | Shared ClusterFuzz issue tracker | |
| Compute scheduling | Dedicated cores per plan | Shared best-effort cluster | |
| CI/CD integration | REST API + webhooks | ClusterFuzzLite (self-hosted) for CI | |
| Pricing | $179–$349 / mo, Enterprise custom | Free for qualifying projects | |
| Onboarding effort | Minutes — push a Dockerfile | Pull-request to oss-fuzz, project acceptance review | |
| Suitability for closed-source CVE research | Designed for it | Not supported |
Pick Fuzze.rs when
- Your codebase is proprietary or commercial — OSS-Fuzz only accepts open-source.
- You want crash reports inside your own dashboard, not in a public ClusterFuzz issue tracker.
- You need predictable scheduling and dedicated compute, not best-effort cluster time.
- You want a managed REST API and webhooks for CI/CD wiring without standing up your own ClusterFuzz instance.
- You don't want every fuzzing-discovered bug becoming a public issue 90 days from disclosure.
Pick OSS-Fuzz when
- You maintain a widely-used open-source project that meets OSS-Fuzz acceptance criteria — the free compute is genuinely valuable.
- You're happy with the public-disclosure timeline (issues go public after 90 days).
- You don't need crash deduplication or coverage trends in your own UI — Google's tooling is good enough for your workflow.
FAQ
Can I use OSS-Fuzz for a private codebase?
No. OSS-Fuzz only accepts open-source projects that meet Google's acceptance criteria. For private codebases, Fuzze.rs is a direct alternative with the same underlying fuzzers (AFL++, libFuzzer, Honggfuzz, Centipede).
Why is OSS-Fuzz free and Fuzze.rs paid?
OSS-Fuzz is a Google-funded public-good service. Fuzze.rs is a commercial managed service — you pay for dedicated compute, private dashboards, and predictable scheduling instead of best-effort cluster time.
Does Fuzze.rs publish my crashes the way OSS-Fuzz does after 90 days?
No. Your crashes are private to your team. We never publish, sell, or share crash data. You control disclosure.
Can I run the same fuzz target on both?
Yes. Both OSS-Fuzz and Fuzze.rs use the same upstream fuzzers, so a libFuzzer or AFL++ harness ports between them with minimal changes.
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