If you're looking for a more powerful tool to spot AI-generated content and plagiarism across many languages, Copyleaks is a good option. It can spot AI content in more than 30 languages and plagiarism in more than 100 languages. The company offers a range of tools, including an AI Detector, Plagiarism Detector and Writing Assistant, and it can be integrated with Learning Management Systems and offer custom API interfaces for those using it in schools or businesses.
Another option is Turnitin, which is geared to spot AI-generated content and flag plagiarism. It's already well established in the education market, particularly in higher education and research, and offers more advanced tools like Feedback Studio, Gradescope and ExamSoft. Turnitin is a good option for educators and schools that want to address the academic integrity issues.
If you're looking for something more specialized, Winston AI has a high detection rate for AI-generated content, in particular text written with LLMs like ChatGPT. It can handle multiple languages and also offers a plagiarism checker and AI image detector. It's available as a Chrome Extension and as an API for web app integration, so it's good for education, SEO and writing.
Last, GPTZero is designed to detect text generated by large language models at different levels. It includes features like Source Scanning for plagiarism and AI copyright infringement, and it can handle multilingual detection. It's good for educators, writers and cybersecurity professionals, with different pricing tiers depending on your needs.