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Head-to-head · Code Clone Detection Tools

@kongyo2/similarity-ts vs QuickDup

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score @kongyo2/similarity-ts #6 in Code Clone Detection Tools 8.6/10 Free plan Free plan✓ 2 of 3 features Visit kongyo2
QuickDup #7 in Code Clone Detection Tools 8.5/10 Open source ✓ 2 of 3 features Visit QuickDup

@kongyo2/similarity-ts leads on 0 checks, QuickDup 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 score@kongyo2/similarity-ts · 8.6/10
  • Free planonly @kongyo2/similarity-ts

@kongyo2/similarity-ts scores higher on our rubric for code clone detection tools: 8.6 against 8.5 out of 10; our editors rank them #6 and #7.

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

@kongyo2/similarity-ts is the better fit for typeScript repositories needing CI clone gates. QuickDup is the better fit for teams reviewing clones in GitHub pull requests.

  • @kongyo2/similarity-ts fits best

    TypeScript repositories needing CI clone gates

  • QuickDup fits best

    Teams reviewing clones in GitHub pull requests

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Side by side

Feature @kongyo2/similarity-ts 8.6/10 Visit ↗ QuickDup 8.5/10 Visit ↗
At a glance
Editor score 8.6 8.5
Ranking #6 in Code Clone Detection Tools #7 in Code Clone Detection Tools
Best for TypeScript repositories needing CI clone gates Teams reviewing clones in GitHub pull requests
Pricing model Free Free
Starting price Free plan Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Self-hosted Self-hosted
Support Docs Docs
Built for Solo, Small business Solo, Small business, Mid-market
Features @kongyo2/similarity-ts 2/3 · QuickDup 2/3
CI integration ✓ ✓
IDE integration — —
Self-hosted option ✓ ✓
Specs
Clone detection method Ast Hybrid
Scan scope Repository Repository
Supported languages Not checked yet Not checked yet
Our review
Pros
  • 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
  • Combines structural fingerprints with token-similarity scoring
  • Adds Git diff, commit-range, caching, and threshold controls
  • Publishes findings as GitHub Actions pull-request annotations
Cons
  • Focused on TypeScript and related file extensions
  • No IDE integration is specified
  • Self-hosted CLI workflows require local setup and maintenance
  • No IDE integration
  • Findings are candidates, not definitive semantic classifications
  • Requires self-hosted command-line and CI setup
Our verdict

@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 →

QuickDup is an open-source command-line tool for detecting likely code clones in source directories or individual files. It is aimed at developers and engineering teams that review duplication across repositories, particularly teams using…

Read the review →
  1. @kongyo2/similarity-tsCode Clone Detection Tools 8.6Free plan
  2. QuickDupCode Clone Detection Tools 8.5Open source

Strengths and trade-offs

  • @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

  • QuickDup — where it wins

    • Combines structural fingerprints with token-similarity scoring
    • Adds Git diff, commit-range, caching, and threshold controls
    • Publishes findings as GitHub Actions pull-request annotations

    Where it doesn't

    • No IDE integration
    • Findings are candidates, not definitive semantic classifications
    • Requires self-hosted command-line and CI setup

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