Open Source Options: OWASP Dependency-Check and RetireJS

OWASP Dependency-Check provides free, open-source SCA capabilities supporting multiple programming languages. While lacking the commercial tools' sophistication, it offers solid basic functionality for identifying known vulnerabilities. The tool integrates well with build systems and CI/CD pipelines, making it accessible for teams beginning their SCA journey. However, limited vulnerability data sources and lack of remediation guidance mean it's best suited for basic security hygiene rather than comprehensive programs.

RetireJS focuses specifically on JavaScript dependencies, scanning for known vulnerabilities in client-side and Node.js libraries. Its lightweight nature and easy integration make it popular for web development teams. The browser extension version enables quick security checks during development. While narrow in scope, RetireJS excels within its niche, providing fast, accurate scanning for JavaScript projects. Organizations often use it alongside broader SCA tools for defense in depth.