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Privacy Policy

Last updated: January 7, 2026

Introduction

StackGrader ("we," "our," or "us") is committed to protecting the privacy of educators and students. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our AI-powered grading platform.

We understand that student data requires the highest level of protection. Our platform is designed with privacy-first principles, and we never sell, share, or use student data for advertising purposes.

Information We Collect

Account Information

  • Email address and name (provided during registration)
  • Authentication credentials (managed securely through Clerk)
  • Account preferences and settings

Educational Content

  • Student work submissions (images, PDFs, documents)
  • Rubrics and grading criteria you create
  • Grades, feedback, and assessment data
  • Class rosters and student identifiers (names or anonymous IDs)

Usage Information

  • Features used and interactions with the platform
  • Device and browser information for technical support
  • Error logs and performance data

How We Use Your Information

  • Providing our service: Processing student work through our AI grading system and delivering results to you
  • Improving accuracy: Using your feedback to calibrate and improve AI grading for your specific grading style
  • Account management: Authenticating users and managing subscriptions
  • Support: Responding to inquiries and troubleshooting issues
  • Product improvement: Analyzing aggregate, anonymized usage patterns to improve our service

Data Storage and Security

All data is stored on secure servers using industry-standard encryption at rest and in transit. We use reputable cloud infrastructure providers with strict access controls.

Student work images and documents are stored in private cloud storage with no public access. Access to student data is strictly limited to authenticated teachers who own that data.

Data Retention and Deletion

You have full control over your data:

  • Clean Up Tools: Remove student work images and AI-generated content while preserving grades
  • Class Deletion: Permanently delete entire classes and all associated data
  • Account Deletion: Request complete account deletion at any time

When you delete data, it is removed from active systems as part of our deletion workflow. Backup copies, if any, are retained according to infrastructure provider retention windows and expire on their normal cycle.

AI Processing

Our AI grading system uses Google's Gemini models to analyze student work. When processing submissions:

  • Data is transmitted securely to AI services solely for grading purposes
  • AI providers do not retain your data or use it for training their models
  • Transcriptions and AI feedback are stored only in your StackGrader account

Third-Party Services

We use the following third-party services:

  • Clerk: Authentication and user management
  • Google Cloud (Gemini): AI processing for grading
  • Cloud Infrastructure: Secure data storage and hosting
  • Stripe: Payment processing (we never see your full card number)
  • Sentry: Error monitoring and performance (no student content is logged)

Student Privacy (FERPA)

StackGrader is designed to support compliance with the Family Educational Rights and Privacy Act (FERPA). As a teacher-facing tool:

  • Teachers maintain control over all student data
  • We use data solely for educational purposes as directed by teachers
  • Teachers using StackGrader with their school's authorization may designate us as a "school official" for FERPA purposes
  • Anonymous grading mode is available for teachers who prefer not to use student names
  • We never contact students directly or share data with unauthorized parties

Your Rights

You have the right to:

  • Access and export your data at any time
  • Correct inaccurate information
  • Delete your data (including complete account deletion)
  • Opt out of non-essential communications

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any material changes by posting the new policy on this page and updating the "Last updated" date. Continued use of the service after changes constitutes acceptance of the updated policy.

Contact Us

If you have questions about this Privacy Policy or our data practices, please contact us at: support@stackgrader.app