projectdiscovery/nuclei
Nuclei is a fast, customizable vulnerability scanner powered by the global security community and built on a simple YAML-based DSL, enabling collaboration to tackle trending vulnerabilities on the internet. It helps you find vulnerabilities in your applications, APIs, networks, DNS, and cloud configurations.
What it does
Nuclei is an open-source security scanning tool that automatically checks your websites, apps, and cloud systems for known vulnerabilities and weaknesses before attackers can exploit them. It uses a community-contributed library of over thousands of threat scenarios to test your products against real-world attack patterns, helping teams catch security holes early.
Why it matters for PMs
With 27,000+ stars and 215 contributors, Nuclei represents a widely trusted standard in the security community, meaning teams that adopt it benefit from collective intelligence about emerging threats rather than relying solely on expensive proprietary tools. For product and engineering leaders, integrating this into the development pipeline shifts security from a costly last-minute audit into a continuous, automated safety net — reducing breach risk and potential regulatory liability.
Early stage — limited signal data
Score updated Feb 18, 2026
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