Advacheck

Advacheck is an online text checking service that detects plagiarism and AI generated writing. Users submit text and receive an analysis of whether it matches existing sources or shows signs of generation by models such as ChatGPT, Gemini or Llama. The vendor describes a universal plagiarism detection system with cross language analysis in more than 100 languages, detection of plagiarized images, and identification of machine written fragments. It states a false positive rate for AI detection of under 0.5 percent. The service is aimed at universities, research institutions and publishers that need to protect academic integrity, and also at students checking work before submission, writers proving authenticity, and marketers or SEO teams who want to show that content is human made. Advacheck does not publish prices. It offers a 14 day free trial that includes a personal consultation and a demo account, requested through a form on the site, and institutional quotes are handled by its sales team. The company lists a Tallinn, Estonia address and says its team has worked on language models since 1997.