Undetectable AI

Undetectable AI is a content-detection and rewriting platform built by Undetectable Inc., a Sheridan, Wyoming-based company that says it serves more than 24 million users. The core product pairs two functions: an AI text detector that scans writing and flags sentences likely to have been produced by a language model, and an AI humanizer that rewrites those flagged sections by varying sentence structure, expanding vocabulary, and adjusting tone so the result reads more naturally. The site also offers an AI image detector for judging whether a picture was generated rather than photographed, plus supporting tools such as a plagiarism checker, paraphraser, essay writer, and detectors aimed at PDFs, voice, and video. The platform targets students, educators, content writers, marketers, SEO professionals, and researchers who need to check or revise text before submitting it. It works through a browser interface and a Chrome extension that brings detection and humanizing into apps like Google Docs and Gmail, and it exposes an API for developers who want to build the detection or humanizing logic into their own workflows. Pricing follows a freemium model: the core detector and humanizer are free with usage limits, and paid plans raise those limits and unlock the additional tools. One honest limitation, which the company itself acknowledges, is that no humanizing tool can guarantee text will pass every AI detector every time.