Code Plagiarism Detection for Universities
Our Hexagram plagiarism engine can pick up most plagiarism in code, built for code, every way code can be inauthentically written, AI, web copying, or from classmates, we catch it all.
We tested your colleagues' courses.
Here's what we found.
Our research team conducted a comprehensive study submitting over 8,000 plagiarized programming assignments to computer science courses across the United States.
The Study
We submitted 8,247 plagiarized assignments to computer science programs at institutions that advertise "comprehensive academic integrity checking" in their course syllabi.
Every single submission was 100% copied from easily accessible sources:
Results
Why Every Single Submission Went Undetected
None Used Web-Scanning Technology
Every institution in our study relied on traditional peer-comparison tools like MOSS, JPlag, or SafeAssign. These tools can only compare submissions within your own course section. They cannot scan the internet. Students who copy from GitHub, ChatGPT, or Chegg are completely invisible to these systems.
Traditional Tools Have Zero AI Detection
Tools like MOSS were created in the 1990s and early 2000s—decades before ChatGPT existed. They have no capability to detect AI-generated code. Your students know this. They're using ChatGPT extensively because they understand that traditional detection methods are blind to it.
Course Syllabi Create False Security
Many syllabi state that submissions will be checked for plagiarism using "comprehensive detection systems" or "advanced integrity tools." However, if Codequiry isn't specifically named, these claims may be misleading. Free, self-hosted tools like MOSS and JPlag have severe limitations that aren't disclosed to students—creating a false sense of deterrence.
Codequiry Is The Only Solution That Detects Both
We are the only code plagiarism detection platform on the market that combines web scanning AND AI detection in a single system. While traditional tools only compare student-to-student submissions (peer checking), Codequiry scans against 40+ billion web sources, detects AI-generated patterns, and provides line-by-line evidence—protecting your course from both internal and external plagiarism.
Protect Your Course's Academic Integrity
Your students know which professors use weak detection tools. If you're not using modern web-scanning and AI detection technology, you're 100% vulnerable to external plagiarism.
Free forever for educators • No credit card required
We've caught 963 students cheating.
Detected by Codequiry's advanced Hexagram tokenization engine—next-generation plagiarism detection.
Expelled
Expelled from university for violating academic integrity policies.
Degrees Revoked
Degrees revoked. Unable to graduate. Years of work erased.
Failed Course
Failed entire course. Had to retake or delay graduation.
Failed Assignment
Failed assignment, lower GPA, tanked academic standing.
All violations were recorded on permanent academic records. These records follow students throughout their careers, affecting job opportunities, graduate school admissions, and professional licensing.
For Students
Write your code with integrity. Academic violations remain on transcripts permanently and are reviewed by every graduate school, employer, and professional licensing board. One mistake can haunt your career for decades.
For Educators
Every case above was detected by Codequiry's Hexagram engine—violations that traditional tools and manual reviews completely missed. Protect your classroom with next-generation detection technology.
Start detecting plagiarism today
Trusted by educators worldwide
Free plan available • No credit card required
Why Codequiry Stands Apart
Purpose-built for code detection. Advanced algorithms for programming plagiarism and AI detection.
Precision-Grade Detection
Advanced fingerprinting with hexagram tokenization (modern successor to winnowing) and AST/CFG analysis. Detects rewritten, refactored, and obfuscated code while minimizing false positives.
- Resilient to variable renaming, code re‑ordering, and whitespace changes
- Superior recall and evidence compared to legacy tools
- Advanced collusion detection within cohorts
- Integrated AI‑generated code detection
Self-Improving ML Engine
Machine learning continuously refines detection thresholds and features using educator feedback and real-world data. The engine adapts and improves with every semester, delivering increasingly accurate results.
- Data‑driven tuning reduces false positives over time
- Language‑aware models across 51+ languages
- Free & unlimited group similarity checks
- Clear, defensible reports with side‑by‑side diffs
Fast Results & Global Coverage
Get comprehensive results in minutes with unparalleled global coverage. Scans billions of sources across GitHub, Stack Overflow, academic databases, and detects AI-generated patterns worldwide.
- Comprehensive results delivered within 10-20 minutes
- 40+ billion lines of indexed code
- GitHub, StackOverflow, academic databases
- Real-time web scanning capabilities
Multi-Engine Detection System
Codequiry combines three specialized detection engines working seamlessly together to provide comprehensive plagiarism detection. Each engine is purpose-built to catch different forms of academic dishonesty.
Codequiry Hexagram
Our proprietary hexagram tokenization algorithm—next-generation peer comparison with advanced structural analysis. Compares cohorts of submissions against each other using sophisticated peer-to-peer analysis. Processes up to 500 submissions in minutes with multi-threading, achieving fewer false positives and superior detection compared to traditional text-matching approaches.
Web Check Engine
Scans trillions of sources across the web to detect external code plagiarism. Efficiently compares submissions against GitHub, Stack Overflow, Chegg, public repositories, and more using our hexagram comparison technology. Includes database and historical analysis to detect resubmissions and evolving patterns over time.
AI Detection Engine
Identifies when students use ChatGPT, GitHub Copilot, or other AI models to generate code. Combines machine learning classification with proprietary heuristics and pattern detection that continuously evolves to stay ahead of emerging AI models. Our adaptive system maintains accuracy as AI technology advances.
Making code plagiarism checking as easy as possible
Traditional text plagiarism scanners can't interpret source code or uncover structural matches. Codequiry's Hexagram engine identifies similar submissions across 50+ languages and 40+ billion sources.
Global Code Database
Comprehensive scanning across billions of lines of public code, academic databases, and web sources for maximum coverage.
Universal Language Support
Native AST parsing for 50+ programming languages with auto-detection and framework-aware analysis.
Lightning Fast Results
Get comprehensive plagiarism reports in under 10 minutes with our cloud-powered analysis engine.
Supports all major programming languages
From Python to Assembly, we've got you covered
No credit card required • 14-day free trial
Stop copy‑paste coding and AI‑assisted shortcuts without slowing your course
Codequiry analyzes structure and logic—not just tokens—to surface defensible, line‑level evidence your faculty can act on in minutes.
Massive Database
Check against over 25 billion lines of public code with comprehensive database scanning for maximum coverage and superior detection accuracy.
Universal Sources
Matches from GitHub, StackOverflow, academic databases and millions more sites with multi-source detection across the entire web.
Smart Analysis
Measure software similarity with advanced algorithms and machine learning for precise detection and minimal false positives.
Visual Intelligence
Interactive 2D diagrams of submission similarity to find clusters of cheating within a classroom with stunning visual analytics.
Detailed View
Matched code snippets with side-by-side line-by-line comparison, syntax highlighting and similarity scoring.
Rich Insights
Dynamic pie charts showing all sources used in code with crystal clear breakdown of code origins and interactive visualizations.
AI-Powered
Automatically recognizes and filters base code templates with smart detection of common patterns and boilerplate.
Global Reach
See highlighted matches from billions of sources with worldwide web scanning and real-time access to latest repositories.
Trust Score
Intelligent confidence scoring of overall submission originality with AI-calculated scoring and detailed explanations.
Industry Leader
Superior detection accuracy with industry-leading comprehensive analysis trusted by 1,000+ universities worldwide.
Lightning Speed
Lightning-fast results delivered within 10 minutes with advanced cloud processing at search depth of 500+ million files.
Enterprise Security
Bank-level secure and private code analysis with enterprise-grade encryption, never stored permanently.
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Built for every code integrity need
From universities to enterprises, Codequiry ensures code originality across every environment.
Universities & Colleges
Ensure academic integrity by verifying that students submit original work. Detect plagiarism across assignments, projects, and exams in real-time.
Tech Companies
Protect intellectual property and ensure employees follow licensing requirements. Verify that code contributions are original and not copied from external sources.
Coding Bootcamps
Maintain program quality by ensuring all student projects and assignments are originally written. Build trust with hiring partners through verified graduate portfolios.
We make code plagiarism checking as easy as it should be
Upload
Drag and drop your code submissions. Auto-detects 50+ languages.
Configure
Choose detection scope: peer matching, web scanning, AI detection.
Analyze
Advanced algorithms detect similarity through AST and token analysis.
Review
Get comprehensive reports with side-by-side diffs and evidence.