What GPTZero does
GPTZero is an AI detection tool that estimates whether text was written by a person or by AI models such as ChatGPT, Claude and Gemini. It is aimed at educators and students, and also at publishers, recruiters, writers and businesses that need to check authorship. The site names an AI detector, a hallucination detector, plagiarism checking, Writing Replay that shows how a document was written, writing feedback and an AI tutor. A Chrome extension adds detection in Gmail and Google Docs, and integrations cover Canvas, Google Classroom, Zapier and an API. Users can start free, with an account needed for scans over 10,000 characters; paid plans are billed monthly or annually, with prices not shown in the page text.
How GPTZero compares with its closest alternatives
3 of the 5 closest alternatives have a free plan, as GPTZero does. Among the 5 that list a starting price, the cheapest is SciSpace at $12 a month and the median is $29. GPTZero starts at $15 a month, below that median. None of the 5 offers an API; FalcoScan's records show none for GPTZero. GPTZero offers a web app and a browser extension. Of the alternatives, all 5 offer a web app and 2 offer a browser extension. GPTZero was founded in 2022; the alternatives were founded between 2013 and 2022, 4 of them earlier. The alternatives with a known headquarters are in the United States, the United Kingdom and India.