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Head-to-head · Code Clone Detection Tools

@kongyo2/similarity-ts vs semdup

  • 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
semdup #8 in Code Clone Detection Tools 8.4/10 Open source ✓ 2 of 3 features Visit semdup

@kongyo2/similarity-ts leads on 0 checks, semdup 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 8.4 out of 10; our editors rank them #6 and #8.

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

@kongyo2/similarity-ts is the better fit for typeScript repositories needing CI clone gates. semdup is the better fit for semantic duplicate detection with local inference.

  • @kongyo2/similarity-ts fits best

    TypeScript repositories needing CI clone gates

  • semdup fits best

    Semantic duplicate detection with local inference

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Side by side

Feature @kongyo2/similarity-ts 8.6/10 Visit ↗ semdup 8.4/10 Visit ↗
At a glance
Editor score 8.6 8.4
Ranking #6 in Code Clone Detection Tools #8 in Code Clone Detection Tools
Best for TypeScript repositories needing CI clone gates Semantic duplicate detection with local inference
Pricing model Free Free
Starting price Free plan Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Self-hosted Self-hosted
Built for Solo, Small business Solo, Small business
Features @kongyo2/similarity-ts 2/3 · semdup 2/3
CI integration ✓ ✓
IDE integration — Not checked yet
Self-hosted option ✓ ✓
Specs
Clone detection method Ast Semantic
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
  • Finds semantic duplicates beyond token-level similarity
  • Supports local CPU or CUDA inference with ONNX
  • Automates repository scans through GitHub Actions
Cons
  • Focused on TypeScript and related file extensions
  • No IDE integration is specified
  • Self-hosted CLI workflows require local setup and maintenance
  • Self-hosted installation adds deployment responsibility
  • Amazon Bedrock embeddings may incur separate AWS charges
  • Language support is limited to the listed programming languages
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 →

semdup is an open-source command-line tool for identifying near-duplicate source code by comparing semantic meaning rather than token sequences. It indexes functions or code blocks, stores embeddings locally, and reports duplicate clusters…

Read the review →
  1. @kongyo2/similarity-tsCode Clone Detection Tools 8.6Free plan
  2. semdupCode Clone Detection Tools 8.4Open 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

  • semdup — where it wins

    • Finds semantic duplicates beyond token-level similarity
    • Supports local CPU or CUDA inference with ONNX
    • Automates repository scans through GitHub Actions

    Where it doesn't

    • Self-hosted installation adds deployment responsibility
    • Amazon Bedrock embeddings may incur separate AWS charges
    • Language support is limited to the listed programming languages

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