Plagiarism detectors

the process of detecting plagiarism

deliberately incorrect entry in a reference work

thumb|Location of Turnitin's Oakland office Turnitin (stylized as turnitin) is an Internet-based similarity detection service run by the American company Turnitin, LLC, a subsidiary of Advance Publications. The software as a service (SaaS) website sells automated checks of submitted documents against its database of prior submitted documents and the content of other websites to identify plagiarism. As of 2025, the company licenses access to its services to over 16,000 universities and high schools worldwide, with more than 71 million students enrolled, but as early as 2006, Princeton, Harvard,

algorithms to detect AI-generated content

GPTZero is an artificial intelligence detection software developed to identify artificially generated text, such as those produced by large language models.

fictitious entry in the form of a misrepresented street on a map

Copyscape is an online plagiarism detection service that checks whether similar text content appears elsewhere on the web. It was launched in 2004 by Indigo Stream Technologies, Ltd.

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Undetectable AI (or Undetectable.ai) is an artificial intelligence content detection and modification software designed to identify and alter artificially generated text, such as that produced by large language models.