AI detector for text from ChatGPT, Claude and Gemini
AI Content Detectors
9 tools · updated November 2026
AI detection tools estimate whether text, images or video were generated by AI, and some also check for plagiarism. No detector is perfect, so treat scores as one signal rather than proof.
All AI content detectors
AI detector and plagiarism checker for publishers
AI detection for text, images and video plus plagiarism checks
Free AI content detector and humanizer
AI detector and humanizer for writing
Real-time deepfake detection and AI watermarking
AI content detector and plagiarism checker
Accurate AI text detector with verified results
Language model API and writing assistant for businesses
Frequently asked questions
Which AI content detectors have a free plan?
Of the 9 AI content detectors listed here, 3 offer a free plan or free tier, including GPTZero, Pangram and Sapling. Free plans usually come with usage limits, so check each listing for details.
Which AI content detectors offer an API?
9 of the listed tools mention an API, SDK or developer platform on their official site, including GPTZero, Originality.ai, Copyleaks, ZeroGPT, Undetectable AI and Resemble AI.
How do you choose which AI content detectors to list?
We list tools that are live, publicly available and clearly built around AI. Every description is written by our team from the tool's official website, and fields we cannot verify, such as a starting price, are left empty. Listings are not paid placements.