Code Plagiarism Detection
Built for EducatorsDevelopersRecruitersBusinesses
Detect AI-generated code, web plagiarism, and peer collaboration in student submissions. One scan. Every source.
Academic integrity has evolved—fast
As educators, you've seen the landscape change dramatically. AI tools, vast online repositories, and new collaboration patterns mean traditional detection methods now only tell part of the story.
The Web Is Everywhere
GitHub, Stack Overflow, and tutorial sites offer instant solutions. Peer-only comparison tools simply can't identify code sourced from these billions of pages.
AI Changes Everything
ChatGPT and Copilot generate unique, syntactically correct code on demand. Each output is different—making similarity-based detection ineffective.
Time Is Precious
Manually reviewing hundreds of submissions isn't sustainable. You need tools that scale with your class size without sacrificing thoroughness.
Turnitin can't check source code
We built Codequiry because we realized traditional plagiarism tools like Turnitin were never designed for programming assignments. They work great for essays—but source code has syntax, logic, and structure that requires specialized analysis.
CS education needed its own solution. So we built one.
Purpose-Built for Code
Variable renaming, function reordering, obfuscation—we detect what text-based tools miss.
Scans the Entire Web
GitHub, Stack Overflow, Chegg, GeeksforGeeks—see exactly where code came from.
Detects AI-Generated Code
ChatGPT and Copilot generate unique code every time. Our AI engine catches it.
The only platform with complete detection coverage
Three specialized engines working in harmony. Each purpose-built to catch different forms of academic dishonesty—together they miss nothing.
Compare submissions within your class to detect student-to-student collaboration. Catches renamed variables, reordered functions, and sophisticated obfuscation attempts.
Real-time scanning across 40+ billion web sources. Catches code copied from GitHub, Stack Overflow, Chegg, GeeksforGeeks, and millions of code repositories worldwide.
High-speed AI detection with our advanced algorithm. Identifies ChatGPT, GitHub Copilot, and AI-generated patterns in milliseconds. Updated regularly to stay ahead of new AI models.
Comprehensive coverage for thorough academic review
Global Web Search
Real-time indexing across trillions of web pages, updated continuously
Git Repositories
Complete coverage of GitHub, GitLab, Bitbucket, and private repos
Stack Overflow
Every question, answer, and code snippet indexed and searchable
Homework Help Sites
Chegg, Course Hero, Quizlet, Bartleby, and solution databases
Code Archives
Google Code, SourceForge, academic databases, and historical code
Historical Matching
Cross-semester and cross-institution submission comparison
Codequiry Database
Proprietary database of hundreds of millions of code submissions
Dev Communities
Pastebin, CodePen, JSFiddle, Replit, and developer forums
Everything you need to protect academic integrity
Purpose-built for computer science education. Not a text plagiarism tool with code features bolted on—a true code-first platform.
Side-by-Side Comparison
Line-by-line diff viewer with syntax highlighting, similarity scoring, and one-click navigation between matched sections. Clear documentation for academic integrity reviews.
Visual Clustering
Interactive 2D diagrams that reveal collaboration patterns at a glance. Visualize submission relationships, identify unexpected similarities, and understand how code was shared.
AI Code Detection
Machine learning models trained to identify ChatGPT, Copilot, and AI-generated code patterns. Updated weekly as AI models evolve. Catches what humans can't see.
10-Minute Results
Cloud-powered analysis across billions of sources delivers comprehensive reports while you wait. Process 500 submissions in under 10 minutes. No queues, no waiting.
Source URL Tracking
When we find a match, we show you exactly where it came from. Direct links to the source page, file, or repository. Complete transparency for fair conversations with students.
Public API
Powerful REST API for custom integrations. Build your own workflows, integrate with your systems, and automate code checking at scale.
See why leading universities switched to Codequiry
Loved by professors at 5,000+ institutions
"The web scanning feature identified code similarities from GitHub that MOSS completely missed. We addressed 23 cases in one semester that we wouldn't have discovered otherwise. A real game changer for maintaining academic standards."
"The AI detection has been invaluable. When ChatGPT launched, we faced new challenges. Codequiry's AI detection gave us the tools we needed. We can now ensure students are genuinely learning."
"We process 2,000+ submissions per week. The speed and accuracy is unmatched. The visual clustering feature revealed collaboration patterns we never would have identified manually."
Start detecting plagiarism in under 5 minutes
Upload
Drag and drop your submissions. ZIP files, folders, or use our API. We auto-detect 51+ languages.
Configure
Choose your detection engines: peer matching, web scan, AI detection—or enable all three for complete coverage.
Analyze
Our engines process your submissions in parallel. AST tokenization, web crawling, and AI analysis—all in minutes.
Review
Get actionable reports with side-by-side diffs, source URLs, and similarity scores. Export evidence with one click.
Supports 51+ programming languages
From intro Python courses to advanced systems programming, we've got you covered with language-specific tokenization.
Ready to protect academic integrity?
Join 5,000+ institutions using the world's most advanced code plagiarism detection platform. Start free—no credit card required.
Free plan available for educators • Enterprise pricing for institutions