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Head-to-head · Code Clone Detection Tools

jscpd vs @kongyo2/similarity-ts

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score jscpd #1 in Code Clone Detection Tools 9.4/10 Open source ✓ 2 of 3 features Visit jscpd
@kongyo2/similarity-ts #6 in Code Clone Detection Tools 8.6/10 Free plan Free plan✓ 2 of 3 features Visit kongyo2

jscpd 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 scorejscpd · 9.4/10
  • Free planonly @kongyo2/similarity-ts

jscpd scores higher on our rubric for code clone detection tools: 9.4 against 8.6 out of 10; our editors rank them #1 and #6.

On clone detection method, @kongyo2/similarity-ts gives you Ast where jscpd offers Token.

jscpd is the better fit for broad, CI-driven multi-format clone detection. @kongyo2/similarity-ts is the better fit for typeScript repositories needing CI clone gates.

  • jscpd fits best

    Broad, CI-driven multi-format clone detection

  • @kongyo2/similarity-ts fits best

    TypeScript repositories needing CI clone gates

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Side by side

Feature jscpd 9.4/10 Visit ↗ @kongyo2/similarity-ts 8.6/10 Visit ↗
At a glance
Editor score 9.4 8.6
Ranking #1 in Code Clone Detection Tools #6 in Code Clone Detection Tools
Best for Broad, CI-driven multi-format clone detection TypeScript repositories needing CI clone gates
Pricing model Free Free
Starting price Open source Free plan
Free plan Not checked yet ✓ (best)
Free trial — —
Deployment Self-hosted Self-hosted
Support Docs Docs
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business
Features jscpd 2/3 · @kongyo2/similarity-ts 2/3
CI integration ✓ ✓
IDE integration Not checked yet —
Self-hosted option ✓ ✓
Specs
Clone detection method Token Ast
Scan scope Repository Repository
Supported languages Not checked yet Not checked yet
Our review
Pros
  • Detects exact, renamed, and near-miss clones across repositories
  • Supports 224 language and document formats
  • Adds GitHub Actions, SARIF, history trends, and multiple reporters
  • 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 a command-line tool rather than a visual-first product
  • Self-hosted operation places deployment responsibility with the team
  • Its strongest workflow is centered on repository and CI scanning
  • Focused on TypeScript and related file extensions
  • No IDE integration is specified
  • Self-hosted CLI workflows require local setup and maintenance
Our verdict

jscpd is an open-source command-line tool for detecting duplicated source-code blocks across repositories. It uses language-aware tokenization to identify exact, renamed, and near-miss clones, making it suitable for development teams that…

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. jscpdCode Clone Detection Tools 9.4Open source
  2. @kongyo2/similarity-tsCode Clone Detection Tools 8.6Free plan

Strengths and trade-offs

  • jscpd — where it wins

    • Detects exact, renamed, and near-miss clones across repositories
    • Supports 224 language and document formats
    • Adds GitHub Actions, SARIF, history trends, and multiple reporters

    Where it doesn't

    • Primarily a command-line tool rather than a visual-first product
    • Self-hosted operation places deployment responsibility with the team
    • Its strongest workflow is centered on repository and CI scanning

  • @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
  • jscpd9.4/10 · Open source

    A broad, self-hosted clone detector with strong CI, reporting, and history analysis.

    Visit jscpdFull 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