PlagiarismSearch

PlagiarismSearch compares essays, papers and documents against billions of web pages and returns matched sources with a similarity score, and it also flags text likely written by AI. Universities, teachers, students and companies use it, and 300 words can be checked free.

You drag in a file and usually get an originality report within a few minutes. Extra services include paper analysis of structure and writing quality, a readability check and a free spell checker, and checks can also be run through a Viber or Telegram bot.

Pricing is based on packages of submissions or word counts, sold one-off, monthly, for three months or yearly, with separate word-based packages for AI detection. An API lets schools and platforms build checks into their own systems, and the site is offered in many European and Asian languages.