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@kongyo2/similarity-ts

Free#6 of 23 in Code Clone Detection Tools

@kongyo2/similarity-ts: A focused, self-hosted CLI for TypeScript clone checks and CI gates. Ranked #6 of 23 in Code Clone Detection Tools by our editors (8.6/10); pricing: Free plan; best for typeScript repositories needing CI clone gates.

8.6/10Editor score

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@kongyo2/similarity-ts8.6 Visit kongyo2

At a glance

Editor score
8.6 / 10
Pricing
Free plan
Best for
TypeScript repositories needing CI clone gates
Free plan
Yes
Paid from
Free
Clone detection method
Ast
Facts checked
20 Sep 2026

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

Our verdict on @kongyo2/similarity-ts

@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 part of refactoring or code-quality workflows. The tool compares functions, types, and classes through AST-based tree edit distance scoring rather than relying only on text matching. It is free to use, self-hosted, and distributed for local use through npm.

Its strongest fit is configurable repository scanning. Teams can set similarity thresholds, minimum line or token requirements, and restrictions for same-file or cross-file comparisons. TypeScript and related file-extension filters help narrow the scan, while glob-based exclusions can keep generated or intentionally repeated code out of results. Pretty and JSON output formats support both human review and automation, and CI gating can fail a workflow when duplicate code is detected.

This focus makes the package a practical choice for TypeScript teams that want a lightweight, repository-level clone gate without a hosted service or paid tier structure. It is less suitable for buyers seeking IDE integration, a broad multi-language platform, or a managed onboarding experience. The published package metadata identifies version 0.6.0, while the latest README content describes additional accuracy work associated with 0.7.0, so teams should review the package and repository state before standardizing on a version. Choose it when AST-based checks and local control matter more than ecosystem breadth.

Your product? Our editors can test @kongyo2/similarity-ts in depth and publish a review, labelled as paid · from $149/mo →

@kongyo2/similarity-ts pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on github.com

@kongyo2/similarity-ts fact sheet

Free plan	Yes
Paid from	Free
Clone detection method	Ast
Scan scope	Repository
CI integration	Yes
IDE integration	No
Self-hosted option	Yes
Supported languages	Not verified
Deployment	Self-hosted
Support	Docs
Built for	Solo, Small business (editorial estimate)
Pricing	Free plan
Website	github.com
Facts checked	20 Sep 2026

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used @kongyo2/similarity-ts for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

@kongyo2/similarity-ts is listed in our Code Clone Detection Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update