Announcement: The long-awaited release of Codequiry V2 is now underway! Many new features, optimizations, and improvements all being pushed in phases.
We are thrilled to announce a direct partnership with GitHub and Bing Search to enhance our plagiarism checker with advanced detection capabilities, launching in Q1 2025.

Check Source Code for Plagiarism

Find unoriginal code and software similarity with the most advanced plagiarism detection solution. Investigate potential copied code by highlighting similarities to billions of sources on the web or from submitted peers. Check the similarity of two or more source codes and view highlighted matches. Our easy to use web app can handle all your checking needs in a flash, no downloads, no mess, all contained in your own private checking dashboard.

Meaningful Results

Codequiry was built around source code detection, this means the results you get are meaningful and reliable. Submissions undergo rigorous checks to ensure that code submissions are original. Proven to end code copying in most academic and professional settings.

Smart Matching

Codequiry looks beyond the cosmetics, finding similarities in logic patterns and unique style of code. Altering variables, whitespace, function names, comments, or many other cosmetic features will not affect overall similarity results. Our algorithm and plagiarism detection is constantly improving.

Extensive Reach

Codequiry compares code submissions both internally and externally. First, submissions are extensively checked against one another with our comprehensive peer to peer check. Then, submissions are checked against billions of sources of code on the web. Read a case study

Proven to detect the highest number of code plagiarism cases.

Codequiry's results are highly detailed and allow you investigate any suspicious cases of code plagiarism, allowing you to conclude with certainty if portion of code is copied.

  • Check against over 20 billion lines of public code
  • Matches from GitHub, StackOverflow, our database and millions of more sites
  • Measure software similarity (MOSS alternative)
  • 2D diagram of submission similarity by distance
  • Matched snippets with detailed viewer
  • Pie chart of sources used in code
  • Automatically recognizes base code
  • See highlighted matches from billions of sources on the web
  • Estimated confidence level of overall submission originality
  • Best alternative to Copyleaks, Moss, JPlag, Dolos, Sherlock and more
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What Our Users Are Saying

As a former user of MOSS, we often struggled with its limited ability to detect code plagiarism across the web. Since adopting Codequiry, we've found it to be the most effective tool in this area, offering a user-friendly interface combined with powerful detection capabilities. Thanks to Codequiry, we've identified significantly more cases of plagiarism than we ever did with MOSS alone. Additionally, the command line client has been a game-changer, allowing us to seamlessly submit our students' work directly through the API, streamlining our workflow.

- Dr. Lee, Computer Science Department, UC Berkeley

University of California

Codequiry has been amazing for our department. We used to struggle with the tedious process of manually checking code for plagiarism, but Codequiry has made it incredibly simple. We just upload the files, and it quickly scans them, allowing us to see if any students have copied code from the web or from each other. It's an outstanding tool, far superior to the others we've used before, including Turnitin.

- Prof. Carter, School of Information, University of Michigan

University of Michigan

Since we started using Codequiry in our IIT virtual classrooms, we were surprised to discover how many students were blatantly copying their code from the web. In fact, Codequiry caught a student who had used old code from GitHub, taken from a previous student's submission. This is something we would have never detected on our own. Thanks to Codequiry, this student was held accountable, ensuring academic fairness for our classroom.

- Prof. Kumar, Computer Science Department, IIT Delhi

IIT Delhi

A plagiarism solution made just for source code

Codequiry's plagiarism engine runs against both internal and external sources to detect all forms of unoriginal code. Codequiry was built with the advanced requirements for detecting source code similarity and plagiarism.

Start checking now

Peer Check

The most comprehensive test for checking similarity within a group of provided submissions. Compares the unique fingerprint of one code base to another, detecting logical similarites and instances of code similarity in a group of submissions. Useful for computer science classrooms, interview coherts, coding competitions, and more.

Web Check

A test for plagiarism that compares code to over 100 million sources of code from major public and private repositories, as well as over 2 billion instances of code on the visible web. See similarities and highlighted matches to external sources. Use the web check on one submission or a whole group, even run it with a group similarity check.

We make code plagiarism checking as easy as it should be.

Find unoriginal code and software similarity with the most advanced plagiarism detection solution. Investigate potential copied code by highlighting similarities to billions of sources on the web or from submitted peers. Catch cheating before it runs rampant.

Import Files

1. Upload code and start checks

Specify the programming language, then drag and drop the submissions you wish to check plagiarism or similarity for. Run different types of tests: peer, database, or web check.

Get Results

2. See realtime progress

See realtime checking progress and get results back instantly when your checks are completed. Codequiry's average time from starting checks to receiving results is 1-20 minutes.

Inspect Matches

3. View insights and detailed results

An overview of similarity results will be available in the form of cluster graphs, match tables and histograms. Inspect individual code submissions in detail, with highlighted snippets of matches found in source code, and other useful insights.

Highlighted Matches

4. See what snippets matched

See exactly what portions of code were copied or similar. From all over the web, access to our proprietary database scan and over 20 billion sources we have indexable. Just click through the matches!

Codequiry Supports Every Major Programming Language

Our checker supports over 50 programming languages, including popular ones such as Java, Python, C, C++, JavaScript, PHP, C#, TypeScript, Swift, Ruby, Go, SQL, MATLAB, Perl, Assembly, Kotlin, R, Rust, HTML/JavaScript, VB, XML, Haskell, Lisp, Pascal, Groovy, Dart, Shell, Scala, Objective-C, Lua, Elixir, Markdown, CoffeeScript, Erlang, F#, Fortran, Haxe, Scheme, Tcl, Ada, COBOL, VHDL, Lex, and Yacc.

Additionally, we provide custom options and auto-detect capabilities, ensuring comprehensive and reliable plagiarism detection across diverse coding environments!

Start checking source code today
Our Mission

Codequiry aims to achieve an equally fair environment for fields relating to computer science by preventing the use of unoriginal and plagiarised code. The first step to preserving academic integrity and original source code starts with us.

Codequiry

Disclaimer: The brand images are copyrighted by their respective owners, and we have no affiliation with them. The brands listed represent teams using Codequiry under personal, team, or enterprise plans. Codequiry is utilized by over 5,000 teams globally. Teams and individuals at these organizations can use Codequiry without needing a company-wide plan or contract.

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