Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · Code Clone Detection Tools

PMD vs @kongyo2/similarity-ts

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score PMD #3 in Code Clone Detection Tools 9.0/10 Free plan Free plan✓ 0 of 3 features Visit PMD
@kongyo2/similarity-ts #6 in Code Clone Detection Tools 8.6/10 Free plan Free plan✓ 2 of 3 features Visit kongyo2

PMD leads on 0 checks, @kongyo2/similarity-ts on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorePMD · 9.0/10
  • Free planboth
  • Most features@kongyo2/similarity-ts · 2 of 3

PMD scores higher on our rubric for code clone detection tools: 9.0 against 8.6 out of 10; our editors rank them #3 and #6.

PMD is the better fit for teams wanting clones plus broad static analysis. @kongyo2/similarity-ts is the better fit for typeScript repositories needing CI clone gates.

  • PMD fits best

    Teams wanting clones plus broad static analysis

  • @kongyo2/similarity-ts fits best

    TypeScript repositories needing CI clone gates

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.

Side by side

Feature PMD 9.0/10 Visit ↗ @kongyo2/similarity-ts 8.6/10 Visit ↗
At a glance
Editor score 9.0 8.6
Ranking #3 in Code Clone Detection Tools #6 in Code Clone Detection Tools
Best for Teams wanting clones plus broad static analysis TypeScript repositories needing CI clone gates
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted, Desktop Self-hosted
Support Docs Docs
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business
Features PMD 0/3 · @kongyo2/similarity-ts 2/3
CI integration Not checked yet ✓ (best)
IDE integration Not checked yet —
Self-hosted option Not checked yet ✓ (best)
Specs
Clone detection method Not checked yet Ast
Scan scope Not checked yet Repository
Supported languages Not checked yet Not checked yet
Our review
Pros
  • CPD detects duplicated code alongside 400+ built-in analysis rules
  • Supports 16 languages with Java and XPath custom rules
  • Fits Maven, IDE, CI, and major build-tool workflows
  • AST scoring compares functions, types, and classes structurally
  • Thresholds, exclusions, and scan-scope rules support tailored checks
  • JSON output and CI failure gating fit automated quality workflows
Cons
  • Primarily suits teams comfortable with self-hosted developer tooling
  • Custom rules require Java or XPath knowledge
  • IDE support centers on Eclipse, IntelliJ IDEA, and Visual Studio Code
  • Focused on TypeScript and related file extensions
  • No IDE integration is specified
  • Self-hosted CLI workflows require local setup and maintenance
Our verdict

PMD is an open-source, multilanguage static code analyzer for developers and development teams that need more than duplicate-code detection. Its CPD component identifies duplicated code, while the wider analysis engine covers issues such…

Read the review →

@kongyo2/similarity-ts is an open-source TypeScript code-similarity CLI and library for finding duplicate or structurally similar code. It is aimed at teams maintaining TypeScript repositories, especially those that want clone detection as…

Read the review →
  1. PMDCode Clone Detection Tools 9.0Free plan
  2. @kongyo2/similarity-tsCode Clone Detection Tools 8.6Free plan

Strengths and trade-offs

  • PMD — where it wins

    • CPD detects duplicated code alongside 400+ built-in analysis rules
    • Supports 16 languages with Java and XPath custom rules
    • Fits Maven, IDE, CI, and major build-tool workflows

    Where it doesn't

    • Primarily suits teams comfortable with self-hosted developer tooling
    • Custom rules require Java or XPath knowledge
    • IDE support centers on Eclipse, IntelliJ IDEA, and Visual Studio Code

  • @kongyo2/similarity-ts — where it wins

    • AST scoring compares functions, types, and classes structurally
    • Thresholds, exclusions, and scan-scope rules support tailored checks
    • JSON output and CI failure gating fit automated quality workflows

    Where it doesn't

    • Focused on TypeScript and related file extensions
    • No IDE integration is specified
    • Self-hosted CLI workflows require local setup and maintenance
  • PMD9.0/10 · Free plan

    A strong open-source choice for teams pairing clone detection with broad static analysis.

    Visit PMDFull verdict →
  • @kongyo2/similarity-ts8.6/10 · Free plan

    A focused, self-hosted CLI for TypeScript clone checks and CI gates.

    Visit kongyo2Full verdict →

More comparisons

All code clone detection tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update