Privacy Policy

Last updated: January 2026

Introduction

This Privacy Policy explains how ExplainLLM ("we", "us", "our") collects, uses, and protects your information when you use our educational platform.

1. Information We Collect

We collect the following types of information:

  • Usage data: pages visited, time spent, interactions with visualizations
  • Device information: browser type, operating system, screen resolution
  • Learning progress: completed lessons, challenge scores (stored locally)
  • Preferences: language, theme, depth level (stored locally)

2. Local Storage

Most user data is stored locally in your browser using localStorage and is never transmitted to our servers. This includes: API keys for the playground, learning progress and achievements, user preferences and settings.

3. Cookies and Analytics

We use PostHog for anonymous analytics to understand how users interact with our educational content. You can opt out of analytics cookies using the cookie consent banner. Essential cookies may be used for basic functionality.

4. Third-Party Services

Our service integrates with the following third-party services:

  • Vercel: hosting and content delivery
  • PostHog: privacy-focused analytics (EU servers)
  • Anthropic/OpenAI: LLM APIs (only when you use the playground with your own API keys)

5. Your Rights

Under GDPR and Russian Federal Law 152-FZ, you have the right to: access your personal data, request deletion of your data, object to processing, data portability. Since most data is stored locally, you can clear it by clearing your browser's localStorage.

6. Data Security

We implement appropriate security measures to protect your information. API keys are stored only in your browser's localStorage and are never transmitted to our servers.

7. Children's Privacy

Our Service is not intended for children under 13. We do not knowingly collect personal information from children.

8. Changes to Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of significant changes by posting a notice on the platform.

9. Contact Us

For privacy-related inquiries, please contact us through the platform.