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Duplo

No phone app

7.3No. 6 of 22
in Code Clone Detection Tools
  • Recognised40% of the score59
  • Phone app26% of the score0
  • Documented20% of the score97
  • Free plan14% of the score100
Free plan
Yes
Runs on
Linux, Mac, Windows
Visit site Alternatives

Summary

Duplo is ranked #6 of 22 in code clone detection tools on Samsung Mobile US Press. It runs on Linux, macOS, Windows. There is a free plan.

Duplo plans and pricing

All plans
Duplo Free Free software under GNU GPL v2 or later · prebuilt binaries for Alpine Linux, macOS and Windows github.com · 29 Sept 2026

Compared on code clone detection tools

Free plan
Yesgithub.com
Clone detection method
textgithub.com
Scan scope
repositorygithub.com
CI integration
Yesgithub.com
Self-hosted option
Yesgithub.com

Facts

Purpose
Duplo finds duplicated source code blocks in large codebases.github.com · 28 Sept 2026
Language support
It has built in support for C/C++, Java, C#, VB, GCC assembly, Ada, Erlang, TypeScript and Swift, and can also scan arbitrary text files.github.com · 28 Sept 2026
Filtering
For supported languages, Duplo can remove comments, preprocessor directives and other syntax before checking for duplicate code.github.com · 28 Sept 2026
Reports
It can produce JSON and XML output as well as text reports.github.com · 28 Sept 2026
GitHub Actions
The maker links a GitHub Action that can fail a build when duplicate blocks are found.github.com · 28 Sept 2026
Action limits
The linked GitHub Action has configurable minimum duplicate lines and minimum line length, and a maximum number of files to report.github.com · 28 Sept 2026
Performance
The README reports processing Quake2's 266 files and 102,740 lines in 9 seconds on modern hardware in 2025, and says multithreading can improve performance almost linearly.github.com · 28 Sept 2026
Downloads
Pre-built binaries are available for Alpine Linux, macOS and Windows, and the project can also be built from source.github.com · 28 Sept 2026
Support
The README directs users to open an issue for feedback, feature requests and bug reports.github.com · 28 Sept 2026
License
Duplo is free software under GNU GPL version 2 or, at the user's option, any later version.github.com · 28 Sept 2026
Caveat
The license section says Duplo is provided without warranty, including implied warranties of merchantability or fitness for a particular purpose.github.com · 28 Sept 2026
Text files
Duplo can detect duplicates in arbitrary text files, including duplicates within a single file.github.com · 29 Sept 2026
Input
Files can be supplied through standard input or a separate file containing the file list.github.com · 29 Sept 2026
Limit
The README's quick-start example requires at least 20 lines for a duplicate, though command-line options can be adjusted.github.com · 29 Sept 2026
Maintainer
Duplo was originally developed by Christian M. Ammann and is now maintained and developed by Daniel Lidström.github.com · 29 Sept 2026

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Where it ranks on Samsung Mobile US Press

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Sources