Simian Similarity Analyzer

7.2easy start · #1 of 23
in Code Clone Detection Tools

Free to practise onyes
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, Windows.

Simian Similarity Analyzer is ranked #1 of 23 in code clone detection tools on The Geeks Club. It runs on Linux, macOS, Windows. There is a free plan.

Simian Similarity Analyzer plans and pricing

All plans

Simian Similarity Analyzer Free Open source · Apache License 2.0 simian.quandarypeak.com · 30 Sept 2026

Compared on code clone detection tools

Clone detection method: text
Scan scope: repository
CI integration: Yes
IDE integration: No
Self-hosted option: Yes

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The record

Purpose: Simian scans source files and reports duplicated blocks of code across codebases.
File types: The maker says Simian analyzes human-readable files, including source code, markup, stylesheets, Markdown, and plain text.
Supported languages: Listed languages include Java, C, C++, C#, COBOL, Python, Ruby, PHP, JavaScript, TypeScript, HTML, XML, CSS, Sass, Less, Visual Basic, and Groovy.
Performance: The maker reports a JDK test analyzing over 2.4 million lines and finding more than 140,000 duplicate lines in under five seconds, with results varying by hardware, operating system, and options.
Runtime: Simian runs on the Java Virtual Machine and the repository says its generated JAR runs on JDK 8 or newer.
Usage: The maker says it can be run locally, from scripts, or as part of a build pipeline.
Output formats: Results are plain text by default, with XML, YAML, and editor-friendly formats also supported.
Configuration: Options include a configurable duplicate-line threshold, file include and exclude patterns, language selection, and controls for ignoring identifiers, strings, numbers, and other differences.
Build integration: The repository documents Gradle integration, including an example task that runs Simian against project source files.
License: Simian Similarity Analyzer is licensed under the Apache Software License, Version 2.0.
Support: The maker directs users to Stack Overflow for help with Simian.
Contributions: The maker welcomes feedback and contributions on GitHub.
Maker: Quandary Peak Research is described on its about page as a Los Angeles-based consulting group.
Founded: 2003
Price from: Free

Where it ranks on The Geeks Club

Best Code Clone Detection Tools in 2026#1 of 23

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Sources

simian.quandarypeak.com· checked 30 Sept 2026
github.com/quandarypeak/simian· checked 30 Sept 2026
quandarypeak.com/about/· checked 30 Sept 2026