Undetectable AI

What is Undetectable AI?

Undetectable AI is a text analysis platform that detects AI-generated content and rewrites it to evade detection tools. Made by Undetectable AI Inc., the service offers two core functions: an AI detector that scans text for signs of machine generation, and a humanizer that revises AI-written passages to read as human-authored. The platform analyzes submissions against detection systems from Originality.ai, GPTZero, Writer.com, and Copyleaks, reporting whether content would trigger flags across multiple checkers simultaneously.

The detector claims to identify output from ChatGPT, GPT-4, GPT-5, Claude, Gemini, Llama, and paraphrased variants. According to a 2024 peer-reviewed study in the Indian Journal of Psychological Medicine, Undetectable AI achieved 100% detection accuracy on AI-generated text, 100% accuracy on paraphrased AI content, and 0% false positives on human-written samples. The humanizer rewrites flagged passages by adjusting syntax, vocabulary, and structure while preserving meaning, allowing users to submit AI-drafted work without triggering institutional detection systems. The service operates on a freemium subscription model: free tier users can check text and see multi-detector results, while premium tiers ($9.99–$19.99/month) unlock unlimited rewrites and priority processing. The platform serves 23+ million users across education, publishing, marketing, and business sectors. A Chrome extension enables in-browser detection on Gmail, Google Docs, social media platforms, and other web applications. The API integrates with third-party platforms for programmatic detection and rewriting.

The tool's humanizer function remains controversial in academic and publishing contexts. Many institutions classify using such tools to obscure AI authorship as academic dishonesty, while others view them as legitimate aids for refining machine-generated drafts. Undetectable positions its products around transparency—enabling users to understand detection vul