Originality AI

Originality.ai is a web-based platform that detects AI-generated text, checks for plagiarism, and verifies facts in written content. It combines these checks into a single workflow so publishers and editors can review a piece of writing for authenticity before it goes live, rather than running separate tools. The AI detector is built to flag text produced by models such as GPT-5, Claude, and Gemini, and the company reports high accuracy figures based on its own testing, including multilingual detection across roughly 30 languages. Alongside detection, the platform includes a plagiarism checker, a Content Quality Score, grammar and readability checks, and a "Writing Replay" feature that records the editing history of a document as a form of authorship proof. Scanning can be done through the web app, a Chrome extension that works inside Google Docs and Google Classroom, a Moodle plugin, or an API for teams that want to run checks programmatically. Originality.ai is aimed at content marketers, agencies, SEO teams, and educators who need to screen volumes of text rather than individual casual users. As with any AI detector, its accuracy claims are self-reported by the company, and AI detection tools in general are known to produce false positives on human-written text, particularly from non-native speakers.