Dupehound

Dupehound is a fast, offline, open-source duplicate-code detector built in Rust for teams that want to keep their codebases lean without sending source code to a cloud service. Instead of naive text matching, it uses structural fingerprinting to identify duplicated functions even when variables, parameters, or formatting have been renamed, and can chart duplication trends across Git history so you can see where bloat is accumulating. A built-in CI/CD gate fails builds when duplication crosses a threshold, making it easy to enforce a 'don't add more copy-paste' rule on pull requests. With no AI inference required, no telemetry, and fully local execution, Dupehound is well-suited to security-conscious teams, monorepos, and anyone who wants a deterministic, repeatable way to fight code duplication.