Semgrep

Semgrep is an open-source static analysis tool that scans your codebase to find security vulnerabilities, bugs, and code quality issues before they reach production. It works by matching code patterns against a library of rules, allowing you to catch problems early in the development cycle. The tool supports multiple programming languages including Python, JavaScript, Java, Go, C, and others. You can run Semgrep locally on your machine, integrate it into your CI/CD pipeline, or use it through the web interface. Because it's open-source, you can inspect the rules, customise them for your needs, and contribute improvements back to the community. Semgrep is designed for developers and security teams who want practical, fast scanning without the overhead of more complex solutions. It's particularly useful if you prefer transparent tooling that you can audit and modify yourself.