Originality.AI

Originality.AI is a tool that checks if a piece of text was written by a human or generated by an AI. It scans content against a wide range of popular AI models, including the latest versions of ChatGPT, Claude, and Gemini, and gives you a score indicating the likelihood of AI involvement. Beyond AI detection, it also functions as a full suite of content quality tools, checking for plagiarism, grammar errors, readability, and factual accuracy all in one place.

The tool works by letting you paste text, upload a PDF, or enter a URL. You can then select which scans to run. Its AI detection is based on patented technology, and the company points to multiple third-party studies that rank it as highly accurate compared to other detectors. A standout feature is its free Chrome extension for Google Docs, which records a replay of the document's creation process, offering tangible proof of human authorship.

Originality.AI is built for professionals who need to verify the integrity of written content. Content marketers and editors use it to ensure submitted work is original. Educators and institutions rely on it to uphold academic honesty. Web publishers and SEO agencies employ its bulk scan feature to audit entire sites, making sure all published material meets quality standards before it goes live.