Best Code Clone Detection Tools in 2026

jscpd

jscpd suits developers who want to check repositories for duplication locally or in CI.

PMD suits developers and teams who want static checks and duplicate-code detection in their build or CI workflows.

CloneWorks suits developers or researchers who need to prepare code and detect clones across repositories.

Duplo suits developers who want to scan repositories for repeated code or text and use reports in continuous integration.

copydetect suits educators or others comparing code submissions against reference and boilerplate directories.

CopyPaste suits people who frequently copy and paste, including developers, students, writers, creators, and support or operations teams.

CodeMatch

CodeMatch suits examiners reviewing possible source-code plagiarism or investigating code origins across repositories.

NiCad suits developers or teams looking for similar code fragments across repositories and who can work with its supported languages or provide a TXL grammar.

Hound suits developers who want to search code across repositories using regular expressions and a web interface.

It suits PHP teams scanning repositories for copied or reordered code, including CI workflows.

Simian Similarity Analyzer

Simian suits developers who want to find repeated text or code across repositories and run scans locally, from scripts, or in build pipelines.

It suits Linux and macOS users who need configurable duplicate scanning from a terminal.

It suits developers and teams seeking candidate duplicates in a repository, especially those using GitHub Actions or AI-assisted code review.