A teacher-designed tool for AI plagiarism detection and auto-grading in Google Docs™. Analyzes the writing process to ensure integrity and save time in Google Classroom™.
Listing updated:July 25, 2025
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Overview
Checkmark Plagiarism seamlessly integrates with your Google Classroom™ workflow, providing educators with a powerful tool for auto-grading and plagiarism detection. Designed by teachers, this add-on analyzes not just what students wrote, but how they wrote it—using Google Docs™ revision history and keystroke behavior.

When a teacher attaches Checkmark Plagiarism to an assignment, students submit their Google Docs™ as usual. The system automatically processes these submissions, generating both plagiarism reports and AI-assisted grading feedback. Teachers can view submission statuses directly within the add-on, while students receive their own reports inside Google Classroom™, receiving immediate feedback.

Key Features of Checkmark Plagiarism:
• Auto-Grading – AI-assisted scoring helps save time while preserving teacher oversight
• Keystroke-Based Plagiarism Detection – Analyzes the writing process via revision history and typing behavior
• Document Playback – Replay how the essay was written, not just what was written
• Traditional plagiarism detection

Checkmark Plagiarism simplifies grading and elevates academic integrity, empowering teachers to focus on what matters most: helping students grow as original thinkers and writers.
Additional information
PricingFree of charge
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Checkmark Plagiarism will ask for the permissions shown below. Learn more
Checkmark Plagiarism will need access to your Google account
This will allow Checkmark Plagiarism to :
View and manage documents that this application has been installed in
See all your Google Docs documents
See, edit, create, and delete only the specific Google Drive files you use with this app
See and update its own attachments to posts in Google Classroom
See, create, and update its own attachments to posts in classes you teach in Google Classroom
View your Google Classroom classes
Manage course work and grades for students in the Google Classroom classes you teach and view the course work and grades for classes you administer
View the email addresses of people in your classes
View your Google Classroom class rosters
View course work and grades for students in the Google Classroom classes you teach or administer
Receive notifications about your Google Classroom data
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
Associate you with your personal info on Google
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