Scalable fuzzing infrastructure.
⚡ Executive Summary & Quick Facts
Authoritative Sourceclusterfuzz is clusterfuzz is an open-source project written in Python: Scalable fuzzing infrastructure..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), google/clusterfuzz has accumulated 5,633 GitHub stars and 637 forks. It is written in Python, licensed under Apache-2.0, and ranks #2,700 globally. It is actively maintained with the latest commit recorded on Nov 9, 2026.”
| Repository | google/clusterfuzz ↗ |
|---|---|
| Primary Category | fuzzing |
| Language & Stack | Python |
| Software License | Apache-2.0 |
| Community Traction | ★ 5.6K stars · ⑂ 637 forks · #2,700 globally |
| Maintenance | ● Active (Last commit: Nov 9, 2026) · 103 open issues |
| Target Audience | Developers and engineering teams building with Python, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 97/100 · Grade A+Yes, clusterfuzz is actively maintained. Continuous telemetry recorded the last code commit on Nov 9, 2026 (3 days ago). Supported by 5,633 stars and 637 community forks, this repository holds a calculated health index of 97/100, reflecting very active (commits within last 14 days) and healthy issue cadence.
Star History
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+141
STARS · LAST 30 DAYS
5
PER DAY
#430
MOST-STARRED Python
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +35 | +141 | +450 |
| Per day | 5 | 5 | 5 |
| Forks gained | +3 | +13 | +32 |
clusterfuzz gained 141 stars in the last 30 days, about 5 a day, and now has 5.6K. It is about 8 years old and has averaged roughly 704 stars a year. It ranks #430 among Python repositories and #2,700 across all languages on GitHubRepo.
Trending Record
4
DAYS ON TRENDING
#9106
BEST RANK
Nov 9, 2026
FIRST APPEARANCE
Active
STATUS TODAY
clusterfuzz has maintained a continuous presence across global trending indexes, peaking at #9106. Below is the 30-day activity profile:
💡 Overview
clusterfuzz is an open-source project written in Python: Scalable fuzzing infrastructure.
Engineered for speed, consistency, and developer ease, it solves common hurdles in fuzzing, security, stability. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Python for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ pip install clusterfuzz⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Python >= 3.9, pip, virtualenv
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
clusterfuzz coordinates its core functionality through a modular Python pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed clusterfuzz into Python backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open Apache-2.0 license.
🚀 Getting Started
Install clusterfuzz using your package manager: `pip install clusterfuzz`
Initialize your project workspace or configuration file for clusterfuzz.
Import clusterfuzz into your codebase or invoke it directly from your terminal.
Execute your test suite or run `clusterfuzz --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Python, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
google/clusterfuzz is currently ranked #2,700 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #2,694 | ProtonMail/WebClients | TypeScript | ★ 5.6K | Compare ↗ |
| #2,694 | libp2p/rust-libp2p | Rust | ★ 5.6K | Compare ↗ |
| #2,697 | zenml-io/zenml | Python | ★ 5.6K | Compare ↗ |
| #2,698 | mono/SkiaSharp | C# | ★ 5.6K | Compare ↗ |
| #2,698 | agent-substrate/substrate | Go | ★ 5.6K | Compare ↗ |
| #2,700 | google/clusterfuzz This Project | Python | ★ 5.6K | |
| #2,700 | haraka/Haraka | JavaScript | ★ 5.6K | Compare ↗ |
| #2,702 | devtron-labs/devtron | Go | ★ 5.6K | Compare ↗ |
| #2,702 | QuipNetwork/quip-validator | Rust | ★ 5.6K | Compare ↗ |
| #2,704 | lief-project/LIEF | C++ | ★ 5.6K | Compare ↗ |
| #2,705 | mruby/mruby | C | ★ 5.6K | Compare ↗ |
Frequently Asked Questions
What does clusterfuzz do? +
Scalable fuzzing infrastructure.
Is clusterfuzz actively maintained in 2026? +
Yes, clusterfuzz is actively maintained. The latest code push was recorded on Nov 9, 2026 (3 days ago). It holds a calculated Maintenance Health Score of 97/100 (A+ rating) with 5,633 stars and 103 open issues.
What language is clusterfuzz written in? +
The primary language is Python. Topics include: fuzzing, security, stability, vulnerabilities.
How many stars does clusterfuzz have? +
clusterfuzz has 5,633 stars and 637 forks on GitHub.
How does clusterfuzz rank among GitHub repositories? +
With 5,633 stars, google/clusterfuzz is ranked #2,700 globally across all repositories tracked on GitHubRepo and #430 among Python projects.
What license is clusterfuzz distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
