Know When Students Cheat
in Programming
AI-Written Code Anti-Cheat
from ChatGPT & Others
Ensure Students Aren't
Copying Code
Scan Billions of Sources
for Plagiarised Code
Enforce Academic Integrity
Policies In Your Course
Uphold Academic Integrity
In Programming
78% of CompSci Students now use AI to write assignments, they copy from the web, or from other classmates on top of that. Stop it all with Codequiry.
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.
Smart Algorithms
Codequiry looks beyond the cosmetics, finding similarities in logic patterns and unique style of code. Altering variables, whitespace, or comments won't affect similarity results.
Extensive Code Checking
Codequiry compares code submissions both internally and externally. First, submissions are checked against one another with comprehensive peer to peer checks, then against billions of sources of code on the web.
AI Code Detection
Industry-leading detection for ChatGPT, GitHub Copilot, Claude, and all AI-assisted code generation.
Peer Comparison
Cross-submission analysis that catches collusion, unauthorized collaboration, and contract cheating.
Results That Matter
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 is original.
60+ Languages
Python, Java, C++, JavaScript, Go, Rust, and every major programming language supported.
"We work closely with teachers to make sure students are learning, not just reusing source code from past assignments or pulling solutions from online sources. Codequiry lets us compare an entire cohort against each other and against the web, so patterns show up quickly and clearly. That kind of visibility changes behavior: students know they will be held to an originality standard, and they respond by writing their own code. It has meaningfully reduced AI misuse and plagiarism in our classrooms while reinforcing the learning goals we care about most."
Check Code for Plagiarism
and Similarity
Codequiry empowers educators by ensuring that students are learning and not just copying code.
Upload & Start Checks
Specify the programming language, drag and drop submissions, and run different types of tests—peer, database, or web check.
Learn about our tests
Results in Seconds
See realtime checking progress and get results instantly. Codequiry's average time from starting checks to results is 12 seconds.
Learn about results
Detailed Insights
View cluster graphs, match tables, and histograms. Inspect individual submissions with highlighted matches and side-by-side comparisons.
Get Started FreeBuilt specifically for
source code
Codequiry's plagiarism engine runs against both internal and external sources to detect all forms of unoriginal code—built with the advanced requirements for detecting source code similarity.
Peer Check
The most comprehensive test for checking similarity within a group of submissions. Compares unique fingerprints, detecting logical similarities and code collusion.
Web Check
Compares code to over 100 million sources from GitHub, GitLab, Stack Overflow, and 2 billion+ code instances on the web.
Zeus AST-Powered
Our first in-house detection model, built from the ground up using AST tokenization. More accurate and effective than legacy engines like MOSS or JPlag.
45 Seconds
What takes MOSS 45 minutes, Zeus does in under a minute. No more waiting.
Universal Intelligence
Every programming language, instantly—no configuration needed
Cross-Language Detection
Python from Java? JavaScript from C++? We catch it.
Obfuscation-Proof
Renamed variables? Shuffled functions? Still caught.
Logic-Aware
Detects restructured algorithms others miss
2% False Positive Rate
Industry-lowest. Flag real cheaters, not innocent students.
Performance Comparison
100 student submissions. Same test. Different engines.
*Benchmarked against 100 real student submissions across multiple languages.
Complete protection,
stacked in your favor
Four specialized engines work in parallel. Together they catch what no single tool can.
Peer Comparison
Compares all submissions using AST-level tokenization. Catches renamed variables and reordered functions.
Web Source Check
Checks against GitHub, Stack Overflow, Chegg, and billions of indexed sources with direct URL tracking.
AI Code Detection
Identifies patterns from ChatGPT, Claude, Copilot. Updated weekly as AI models evolve.
AI Analysis Engine
Synthesizes findings, scores risk, presents clear evidence. You make the final call.
No plagiarism
goes unnoticed
Every public source code repository, indexed and searchable in real-time.
Global Web Search
Real-time indexing across trillions of web pages
Git Repositories
GitHub, GitLab, Bitbucket coverage
Stack Overflow
Every Q&A and code snippet indexed
Homework Sites
Chegg, Course Hero, Quizlet monitored
Code Archives
Historical code and academic databases
Real-Time Updates
24/7 indexing of new content
Everything you need to protect
academic integrity
Purpose-built for computer science education. Not a text plagiarism tool with code features bolted on.
Side-by-Side Comparison
Line-by-line diff viewer with syntax highlighting, similarity scoring, and one-click navigation between matched sections.
Visual Clustering
Interactive 2D diagrams revealing collaboration patterns at a glance.
AI Code Detection
Identifies ChatGPT, Copilot patterns. Updated weekly.
10-Minute Results
Process 500 submissions in under 10 minutes. No waiting.
Source URL Tracking
Direct links to where the code was found. Complete transparency.
Public API
Powerful REST API for custom integrations. Build your own workflows and automate code checking at scale.
The results speak
for themselves
Extremely detailed reports let you investigate any suspicious cases of code plagiarism.
20B+ Lines of Code
Comprehensive scanning across web, repositories, and code sources.
Similarity Scoring
Precise algorithms calculate scores with industry-leading accuracy.
2D Clustering Graph
See clusters of similar submissions—spot patterns instantly.
Matched Snippets
Side-by-side comparison with syntax highlighting.
Source Pie Chart
Visual breakdown showing percentage distribution of sources.
Base Code Detection
Automatically recognizes starter code to eliminate false positives.
Web Source Links
Direct links to GitHub, Stack Overflow where code was found.
Confidence Score
AI-powered originality score for informed decisions.
Why top universities
switched to Codequiry
Why educators
love us
Trusted by 1,000+ institutions worldwide
"Teaching over 500 students per term, we faced a critical challenge: detecting code copied from ChatGPT and online sources without viable tools. Codequiry enables us to batch-process entire cohorts efficiently. This technology is essential for maintaining rigorous standards in computer science education."
"The rise of AI-generated code has made verifying student mastery a critical challenge. Codequiry is now essential for upholding our academic standards and ensuring every submission represents original effort."
"Codequiry actually works—detecting AI-generated code and web plagiarism that outdated tools miss. We finally have real enforcement backing our academic integrity policies."
"We found a 99% match between a student and a Chegg solution. I can't believe CS departments are missing this."
"We like that it includes MOSS. But we don't really use it, the Zeus Hyper detection is so much better."
"Used MOSS for years but it couldn't catch web plagiarism at all. Students figured that out fast."
"Love that I can exclude my starter code. Used to get tons of false matches because everyone had the same template."
"Been using it 2 years now. Solid. Does what it says."
Every language.
No configuration.
From Python to COBOL, Codequiry understands them all. Just upload and go.
Code with Integrity
The most effective source code plagiarism detection. Trusted by 1,000+ institutions worldwide.
Plans from $29/month · Enterprise pricing available