AI Content Detectors - Directory w/ AI Reviews

As AI-generated text floods the internet, tools for detecting it have become essential for educators, publishers, and platforms. GPTZero and Originality.ai use perplexity and burstiness analysis to distinguish human from machine writing. Turnitin has integrated AI detection into its academic plagiarism pipeline, while Copyleaks and QuillBot's detection tool round out the options for content teams verifying originality.

Originality.ai 1 4.8 New Originality.ai Paid API Enterprise 2 reviews Originality.ai is one of the most widely used AI content detection platforms, specializing in identifying text generated by GPT-4, Claude, Gemini, and other large language models. Its detection engine provides percentage-based AI probability scores and is continuously updated to detect content from Copyleaks 2 4.7 New Copyleaks Freemium Free Plan API Enterprise 3 reviews Copyleaks provides AI content detection that identifies text generated by ChatGPT, GPT-4, Claude, Gemini, and other AI models, along with traditional plagiarism detection that finds copied and paraphrased content. It offers sentence-level highlighting, supports over 100 languages, and can detect cro GPTZero 3 4.6 New GPTZero Freemium Free Plan API Enterprise 3 reviews GPTZero is one of the most widely recognized AI content detection tools, capable of identifying text generated by ChatGPT, GPT-4, Claude, Gemini, and other large language models. It provides document-level and sentence-level detection scores using perplexity and burstiness analysis, highlighting spe Turnitin AI Detection 4 4.6 New Turnitin AI Detection Paid API 1 review Turnitin is the industry-leading academic integrity platform that now includes an AI writing detection capability alongside its established plagiarism detection engine. Its AI detector analyzes student submissions to identify text likely produced by large language models, providing educators with a Crossplag 5 4.0 New Crossplag Freemium Free Plan API 2 reviews Crossplag uses deep learning to distinguish human-written from AI-generated text across multiple languages with confidence scores. Sapling AI Detector 6 3.8 New Sapling AI Detector Freemium Free Plan API 1 review Sapling AI Detector is a free tool from Sapling Intelligence that analyzes text to determine whether it was likely generated by an AI language model such as ChatGPT, GPT-4, or similar systems. It provides sentence-by-sentence highlighting to show which portions of a document appear AI-generated vers Surfer SEO 7 3.7 New Surfer SEO Paid API Enterprise 2 reviews Surfer SEO includes an AI content detection feature that allows users to check whether text appears to be AI-generated. This capability helps content teams verify the originality and human quality of their articles before publication, complementing the platform's content creation and optimization fe QuillBot 8 3.4 New QuillBot Freemium Free Plan Enterprise 2 reviews QuillBot includes a Plagiarism Checker that scans written content against web sources and academic databases to identify potential duplication and ensure content originality. The tool highlights matching passages with source links and match percentages, making it valuable for students, academics, an