Copyleaks
Plagiarism and AI content detection platform with support for 100-plus languages, used by educators, publishers, and enterprise teams.
About
Copyleaks combines traditional plagiarism scanning against billions of web pages and academic sources with AI content detection that identifies text from GPT-4, Claude, Gemini, and similar models. It also flags AI-generated images and includes grammar checking and a writing assistant. Cross-language detection, code plagiarism scanning, LMS integrations for educational institutions, and a full API round out the feature set. Accuracy in independent tests consistently ranks near the top of the market with a comparatively low false positive rate. A free tier covers a small monthly page allowance; paid plans start at around $8.99 per month and scale up for business and enterprise needs.