The Best Code Duplication Detection Tools in 2026

• 18 tools ranked
• Updated Oct 2026
• Researched from official sources
• Compare tools in this directory
• Sponsor this list

We researched code duplication detection tools using information on their official websites, including pricing pages, plan tables, and product documentation. Rankings focus on the category’s core job, value for money, and verified features such as language coverage, near-duplicate detection, CI reporting, and duplication thresholds.

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

The full ranking 18 tools, best first

1. 1
   
   jscpd 8.8

   Best forTeams needing broad, CI-ready clone analysis

   A self-hosted, open-source clone analyzer with broad format support and CI reporting.

   Open source Our jscpd verdict → + Compare Visit jscpdFor vendors Sponsor this spot · #1 · $149/mo →
   8.8/10★★★★☆

   Visit jscpd
2. 2
   P
   PMD 8.5

   Best forTeams wanting static analysis with CPD

   PMD combines configurable static analysis with CPD copy-paste detection across development workflows.

   Free plan Our PMD verdict → + Compare Visit PMDFor vendors Sponsor this spot · #2 · $99/mo →
   8.5/10★★★★☆

   Visit PMD
3. 3
   A
   Avidemux 7.0

   Best forBasic video editing on a desktop

   Avidemux handles basic video processing, but it is not a code-duplication detector.

   Free plan Our Avidemux verdict → + Compare Visit AvidemuxFor vendors Sponsor this spot · #3 · $79/mo →
   7.0/10★★★★☆

   Visit Avidemux
4. 4
   F
   Fallow 6.9

   Best forSmall teams enforcing duplication gates in CI

   A free TypeScript and JavaScript duplication scanner with CI gates and optional paid runtime insights.

   • Duplication gates
   • Near-duplicate detection

   Free plan · 30-day trial Our Fallow verdict → + Compare Visit FallowFor vendors Sponsor this spot · #4 · $69/mo →
   6.9/10★★★☆☆

   Visit Fallow
5. 5
   
   art-dupl 6.8

   Best forGo teams wanting AST-based CI checks

   A self-hosted Go and Templ duplication checker with AST matching and CI workflows.

   Open source Our art-dupl verdict → + Compare Visit art-duplFor vendors Sponsor this spot · #5 · $59/mo →
   6.8/10★★★☆☆

   Visit art-dupl
6. 6
   
   JPlag 6.7

   Best forAcademic or multi-language similarity analysis

   A free, syntax-aware tool for pairwise program-similarity analysis across 20 languages.

   • Near-duplicate detection

   Free plan Our JPlag verdict → + Compare Visit JPlag
   6.7/10★★★☆☆

   Visit JPlag
7. 7
   
   Simian Similarity Analyzer 6.6

   Best forBroad-language duplicate checks in build pipelines

   A configurable, language-agnostic duplicate checker for build pipelines.

   • Duplication gates
   • Near-duplicate detection

   Open source Our Simian Similarity Analyzer verdict → + Compare Visit Simian
   6.6/10★★★☆☆

   Visit Simian
8. 8
   N
   NiCad 6.5

   Best forResearchers needing configurable clone analysis

   A configurable command-line tool for finding exact and near-miss code clones.

   Free plan Our NiCad verdict → + Compare Visit NiCad
   6.5/10★★★☆☆

   Visit NiCad
9. 9
   C
   CCFinderX 6.4

   Best forLinux users analyzing six legacy languages

   A Linux-focused, open-source clone detector for six languages, with AST-based matching and GUI analysis.

   • Near-duplicate detection

   Free plan Our CCFinderX verdict → + Compare Visit CCFinderX
   6.4/10★★★☆☆

   Visit CCFinderX
10. 10
    CL
    CCDetect-lsp 6.3

    Best forDevelopers wanting real-time editor clone diagnostics

    An open-source language server for configurable, real-time duplicate-code diagnostics.

    • Near-duplicate detection

    Free plan Our CCDetect-lsp verdict → + Compare View CCDetect-lsp
    6.3/10★★★☆☆

    View CCDetect-lsp
11. 11
    D
    Duplo 6.2

    Best forSimple repository duplicate checks with GitHub Actions

    A focused, configurable scanner for repository duplicate checks and GitHub Actions.

    Free plan Our Duplo verdict → + Compare Visit Duplo
    6.2/10★★★☆☆

    Visit Duplo
12. 12
    D
    dcd 6.1

    Best forFuzzy text clone checks with CI exit codes

    A focused, self-hosted detector for fuzzy code clones and CI threshold checks.

    Free plan Our dcd verdict → + Compare Visit dcd
    6.1/10★★★☆☆

    Visit dcd
13. 13
    D
    Dolos 6.0

    Best forSchools comparing programming assignment submissions

    Dolos compares programming submissions and groups similar code in visual reports.

    Free plan Our Dolos verdict → + Compare Visit Dolos
    6.0/10★★★☆☆

    Visit Dolos
14. 14
    PI
    Pattern Insight Clone Detection 5.9

    Best forEnterprises needing web-based clone review

    A cloud clone-analysis tool for reviewing modified duplicates across versions and codebases.

    • Near-duplicate detection

    Pricing on request Our Pattern Insight Clone Detection verdict → + Compare Visit site
    5.9/10★★★☆☆

    Visit site
15. 15
    C
    CloneDR 5.8

    Best forWindows teams needing detailed clone reports

    A Windows desktop analyzer for teams that need detailed reports on exact and near-miss clones.

    • Near-duplicate detection

    Our CloneDR verdict → + Compare Visit CloneDR
    5.8/10★★★☆☆

    Visit CloneDR
16. 16
    D
    Deckard 5.7

    Best forSelf-hosted tree-based clone research

    A self-hosted command-line tool for tree-based clone research and HTML reporting.

    Open source Our Deckard verdict → + Compare Visit Deckard
    5.7/10★★★☆☆

    Visit Deckard
17. 17
    S
    SourcererCC 5.6

    Best forLarge-scale token clone processing

    A configurable, self-hosted detector built for large-scale repository clone analysis.

    Open source Our SourcererCC verdict → + Compare Visit SourcererCC
    5.6/10★★★☆☆

    Visit SourcererCC
18. 18
    PN
    phpcpd-next 5.5

    Best forPHP projects needing modern CI clone checks

    Open-source PHP clone checks with broad matching, CI outputs, and self-hosted operation.

    Open source Our phpcpd-next verdict → + Compare Visit phpcpd-next
    5.5/10★★★☆☆

    Visit phpcpd-next

No tools match those filters.

Compare at a glance

#	Tool	Free plan	Paid from	Score
1	jscpd		Free	8.8
2	PPMD	Yes	Free	8.5
3	AAvidemux	Yes	Free	7.0
4	FFallow	Yes	$20/seat/mo	6.9
5	art-dupl		Free	6.8
6	JPlag	Yes	Free	6.7
7	Simian Similarity Analyzer	Yes	Free	6.6
8	NNiCad	Yes	Free	6.5
9	CCCFinderX	Yes	Free	6.4
10	CLCCDetect-lsp	Yes	Free	6.3
11	DDuplo	Yes	Free	6.2
12	Ddcd	Yes	Free	6.1
13	DDolos	Yes	Free	6.0
14	PIPattern Insight Clone Detection			5.9
15	CCloneDR	No		5.8
16	DDeckard		Free	5.7
17	SSourcererCC		Free	5.6
18	PNphpcpd-next		Free	5.5

Head-to-head All 22 comparisons →

• Ajscpd vs Avidemux
• Fjscpd vs Fallow
• jscpd vs JPlag
• jscpd vs Simian Similarity Analyzer
• PAPMD vs Avidemux
• PFPMD vs Fallow
• PPMD vs JPlag
• PPMD vs Simian Similarity Analyzer
• AFAvidemux vs Fallow

How we rank code duplication detection tools

Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated 7 Oct 2026 · How we research and update