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Best Code Clone Detection Tools in 2026
Code clone detection tools help you find repeated or closely related code for review. Compared on supported languages, scan scope, and clone detection method, the entries offer criteria for matching a tool to the code you work with. Duplo, PMD, and CloneWorks are among the named options. CI integration and IDE integration can help you assess how detection results may fit your workflow, while self-hosting, free-plan availability, and paid-from pricing address deployment and cost. Consider which languages and parts of a project you need to scan, then weigh those details against how your team prefers to review findings.
- 23 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
jscpd
Free plan Open source APILinuxMac+2jscpd combines repository-wide clone detection with build thresholds, reports, and developer workflow integrations.
- 2
CloneWorks
Free plan LinuxMacWindowsCloneWorks provides code preparation and token-based clone detection, with configurable extraction granularity and similarity threshold.
- 3
CCFinderSW
Free plan WindowsCCFinderSW provides configurable token-based clone detection with multiple output formats and command-line controls. Its language setup and Windows-only platform are important constraints to weigh.
- 4
copydetect
Free plan APILinuxMac+2copydetect offers configurable directory comparisons and HTML reports for code review, including reference and boilerplate options.
- 5
CopyPaste
Free plan MacWindowsCopyPaste combines broad clipboard format support with search and organization tools while keeping history local. Linux users should note that supported development ended after v2.11.0.
- 6
Duplo
Free plan LinuxMacWindowsDuplo combines language-aware duplicate checking with text-file scanning and several report formats. Check the quick-start threshold and license disclaimer against your intended use.
- 7
NiCad
Free plan LinuxMacSelf-hosted+1NiCad offers configurable clone detection across several languages and analysis granularities. Check its OpenTxl and Turing+ requirements against your setup before choosing it.
- 8
Amimica
Free plan APISelf-hostedAmimica provides configurable repository clone detection through a CLI or MCP server, with results meant to support human review.
- 9
dcd
Free plan LinuxMacdcd offers several ways to detect, inspect, and export duplicate-code matches, including fuzzy matching and CI-oriented JSON.
- 10
Deckard
Free plan APILinuxMac+2Choose Deckard if you need an open-source, script-driven tool for finding code clones and accessing clone data programmatically.
- 11
PMD
Free plan LinuxMacSelf-hosted+1PMD combines broad language coverage, custom rules, and bundled duplicate detection without a listed price. Check language-specific rule coverage and version support before adopting it.
- 12
Hound
Free plan APILinuxMac+2Hound combines repository indexing with regex search and offers several ways to connect it to existing developer workflows. Account for its Windows and TLS limitations when planning a deployment.
- 13
phpcpd-next
Free plan APILinuxSelf-hostedphpcpd-next offers several clone-detection modes and output formats, including options for CI workflows.
- 14
CodeMatch
Free plan WindowsCodeMatch helps prioritize source-code pairs for expert inspection and provides reports showing what contributed to high scores. Its scores indicate similarity, not a precise finding of plagiarism.
6.8 Visit site - 15
dskDitto
Free plan LinuxMacChoose dskDitto if you want configurable duplicate and near-duplicate searches from a terminal, with export and explicit file-action controls. Look elsewhere if you need a mature graphical interface.
- 16
Simian Similarity Analyzer
Free plan LinuxMacWindowsChoose Simian if you need an open-source, configurable duplicate-code scanner that can run locally or in a build pipeline.
- 17
DUDE (DUplicates DEtector)
Free plan LinuxWindowsChoose DUDE if you need a free Linux or Windows utility with content-hash matching, image-similarity detection, previews, and several ways to handle marked files.
- 18
QuickDup
Free plan LinuxMacWindowsChoose QuickDup if you want a free, open source way to generate structural code clone candidates for review, including GitHub Actions annotations.
- 19
@kongyo2/similarity-ts
Free plan@kongyo2/similarity-ts provides configurable structural comparisons and output choices for TypeScript repositories.
- 20
SourcererCC
Free plan LinuxSelf-hostedSourcererCC offers configurable token-based clone detection across several code granularities. Plan for tokenization and multi-node result aggregation, and note the stated Mac limitation.
- 21
art-dupl
Paidart-dupl combines several clone-matching approaches with repository-level CI checks and reporting options. Its stated source-language scope is Go and .templ.
- 22
semdup
Paid LinuxMacSelf-hosted+1Choose semdup if you want a free, open-source repository scanner for semantically similar code, with local inference and CI workflow support.
- 23
Vendetect
Paid
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price