Catch When Your Students
Copy Code Off the
Web or Use AI
Source Code Plagiarism Detector
That Scales With Modern Needs
Ensure Authentic Programming Work
Code Plagiarism Defense
Never Seen Before
Fostering Authentic Learning
In Computer Science
Comprehensive similarity detection for source code originality, including AI generated source code, across web sources and group assignments in classes and hackathons
AI Threat
We're working hard to ensure our AI Detection for Source Code is at highest flagship levels of accuracy to detect AI Written code. With weekly updates, we believe it will achieve industry unbeatable accuracy in detecting AI generated source code. This is a valuable tool for Educators that need to ensure students haven't submitted code from e.g ChatGPT 5+ as their own work.
Your current tools weren't designed for source code
Essay checkers treat code as plain text. Peer-only tools miss the web entirely. Students know exactly how to exploit these gaps.
Turnitin can't check code
Turnitin has web detection—but not for code. It treats source code as plain text, completely blind to programming logic and syntax.
MOSS & JPlag only check peers
They compare submissions to each other—nothing else. No GitHub, no Stack Overflow, no Chegg, no AI detection.
"Just copy from GitHub and rename variables. MOSS can't check websites anyway."
Complete protection, stacked in your favor
Four specialized detection engines work in parallel. Together they catch what no single tool can.
Peer Comparison
Compares all submissions against each other using AST-level tokenization. Catches renamed variables and reordered functions.
Web Source Scan
Checks every submission against GitHub, Stack Overflow, Chegg, and billions of indexed sources. Direct URL tracking.
AI Code Detection
Identifies code patterns from ChatGPT, Claude, Copilot and other AI tools. Updated weekly as models evolve.
AI Analysis Engine
Synthesizes all findings, scores risk, and presents clear evidence. You make the final call.
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. Sees what humans can't.
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
Why educators love us
Trusted by 500+ institutions worldwide
"I came across Codequiry through an ad, but it proved as a life saver in my CS course. I had no way to check if students were submitting original source code, now I do. And the results are amazing."
"MOSS kept timing out on large submissions. Switched to this and haven't looked back."
"The web scan found a Chegg solution I didn't know existed. Student had copied it almost line for line. Would've missed it completely otherwise."
"Makes the awkward conversations easier. I can just show them the report instead of arguing about it."
"Works with Canvas which was the main thing for us. Students submit like normal, I get the reports. Simple."
"Used MOSS for years but it couldn't catch web plagiarism at all. Students figured that out fast."
"Been using it 2 years now. Solid. Does what it says."
"Love that I can exclude my starter code. Used to get tons of false matches because everyone had the same template."
"I'm just a TA but this makes my life so much easier. The side by side view is really clear."
"Found a ring of 6 students sharing code. The clustering thing made it obvious immediately."
"Support actually responds. Had an issue, they fixed it same day. Refreshing honestly."
"MOSS was free but the hassle wasn't worth it. This just works without the email back and forth."
"The AI detection helped us catch a few ChatGPT submissions early in the semester. Good heads up."
"Moved from MOSS after students started using ChatGPT. MOSS has no idea about AI generated code."
"The reports are way better than MOSS. Actually looks professional when you have to show admin."
Start detecting plagiarism in under 5 minutes
Upload
Drag and drop your submissions. ZIP files, folders, or use our API. We auto-detect 65+ 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 65+ 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 500+ institutions using the world's most advanced code plagiarism detection platform. Plans from $4,999/month.
Plans starting at $4,999/month • Enterprise pricing for institutions