AI Detection & Anti-Detection

GPTZero

Subcategory: AI Content Detector

Gold-standard AI content and plagiarism detection for educators

GPTZero uses statistical perplexity and burstiness metrics to detect whether text was generated by ChatGPT, Claude, Gemini, or a human author.

Originality.ai

Subcategory: AI Content Detector

AI detector and plagiarism checker for web publishers and SEO

Built specifically for content marketing agencies and web publishers, Originality detects content from GPT-4o, Claude 3.5, and rephrased content to safeguard SEO rankings.

Undetectable AI

Subcategory: Text Humanizer

AI text humanizer that bypasses detectors and improves readability

Undetectable AI rewrites robotic machine-written content into natural, human phrasing that bypasses major detectors including Turnitin, GPTZero, and Originality.

Winston AI

Subcategory: AI Content Detector

Industry-standard AI content detector for education and publisher compliance

Winston AI provides high-precision AI content detection with 99.98% verified accuracy, detecting text generated by ChatGPT, Claude, and Gemini with detailed sentence-level heatmaps.

ZeroGPT

Subcategory: AI Content Detector

High-speed free AI detector for essays, blogs, and academic content

ZeroGPT is one of the internet’s most widely accessed free AI content detectors, analyzing text perplexity, burstiness, and repetitive structures to identify automated text.

Copyleaks AI Detector

Subcategory: AI Content Detector

Enterprise-grade AI detection, plagiarism checking, and code governance

Copyleaks provides 99.1% accurate detection for text generated by GPT-4, Claude, Gemini, and Llama, with cross-language detection and source code plagiarism analysis.

Turnitin AI Writing Detector

Subcategory: Plagiarism Checker

The academic standard for integrity, plagiarism, and AI detection

Turnitin AI Writing Detector is used by thousands of universities worldwide to identify text generated by large language models embedded directly within academic LMS workflows.

StealthGPT

Subcategory: Text Humanizer

Undetectable AI engine that bypasses all major AI content detectors

StealthGPT rewrites AI-generated essays, articles, and copy into natural human prose designed to pass Turnitin, GPTZero, and Copyleaks detectors with high readability.