🔍 AI Detection AI Detector Freemium

GPTZero

The leading AI content detector — identify whether text was written by ChatGPT, Claude, or other AI models.

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GPTZero is the most widely used AI content detector, built by Princeton student Edward Tian. It analyzes text for “perplexity” and “burstiness” — patterns that distinguish human writing from AI output. Used by educators, publishers, and HR professionals to identify AI-generated content.

Key Features

  • Detects ChatGPT, Claude, Gemini, and other AI models
  • Sentence-level highlighting of AI-written sections
  • Batch file upload for bulk detection
  • API for integration into other tools
  • Writing feedback mode
  • Plagiarism check add-on

Pricing

  • Free: 10,000 characters/check, 3 files/month
  • Essential ($10/month): 50,000 chars, 100 files
  • Pro ($16/month): 150,000 chars, unlimited files
  • Enterprise: Custom volume pricing

Best For

Teachers, professors, publishers, HR teams, and anyone who needs to verify whether submitted text was written by a human or an AI.

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