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.
Global Code Database with Universal Language Support
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.
Massive Global Database
We maintain comprehensive global and academic code databases to detect plagiarism across universities, past submissions, and web sources worldwide.
50+ Programming Languages
Universal native parsing for all major programming languages. Our engine understands syntax, structure, and semantics across languages.
Auto-detects language • Native AST parsing • Framework-aware
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.
Check against over 25 billion lines of public code
Comprehensive database scanning with the world's largest code repository index for maximum coverage and superior detection accuracy
Matches from GitHub, StackOverflow, academic databases and millions more sites
Multi-source detection across the entire web, including private repositories and educational platforms
Measure software similarity (Superior MOSS alternative)
Advanced similarity algorithms with machine learning for precise detection and minimal false positives
Interactive 2D diagrams of submission similarity by distance
Find clusters of cheating within a classroom or group with stunning visual analytics and clustering
Matched code snippets with advanced detailed viewer
Side-by-side line-by-line comparison with syntax highlighting and similarity scoring
Dynamic pie charts showing all sources used in code
Crystal clear breakdown of code origins and sources with interactive visualizations and metrics
Automatically recognizes and filters base code templates
Smart AI detection of common code patterns, libraries, and boilerplate to focus on original content
See highlighted matches from billions of sources across the web
Worldwide web scanning with real-time access to the latest code repositories and online sources
Intelligent confidence scoring of overall submission originality
Reliable AI-calculated confidence scoring with detailed explanations for informed decision making
Superior detection accuracy compared to other tools
Industry-leading accuracy with comprehensive analysis trusted by 1,000+ universities worldwide
Lightning-fast results delivered within 10 minutes
Get comprehensive results quickly without waiting hours. Advanced cloud processing at search depth of 500+ million files
Bank-level secure and private code analysis
Your code is encrypted with enterprise-grade security, never stored permanently, and never shared with third parties
Faculty verification is required to access .edu benefits
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.