Semmle is a software engineering analytics company that specializes in providing code analysis tools designed to improve software quality and security. The company's flagship product, LGTM (Looks Good To Me), offers automated code review and analysis that helps developers identify vulnerabilities and maintain code standards. By transforming code into a queryable database, Semmle enables developers to write custom queries to detect potential issues across large codebases efficiently. Its approach allows for enhanced collaboration among developers, security analysts, and managers to ensure robust software development processes. Semmle was acquired by GitHub in 2019, marking a significant step in integrating its advanced analysis capabilities into GitHub's platform.