Copyleaks

Copyleaks is a plagiarism checker that expanded into AI detection, offering both in one platform with unusually broad language support and LMS integrations. It targets schools, universities, and enterprises with per-seat pricing, credits, and an API. Its multilingual coverage is a real strength, though its AI-detection accuracy in independent tests trails the vendor's headline figures and, like all detectors, carries false-positive risk.

Copyleaks is one of the longer-established players in the originality space, having built a plagiarism-checking business before pivoting early into AI detection. It now offers combined AI and plagiarism scanning, with AI detection advertised across 30+ languages and plagiarism detection across 100+ languages, plus direct integrations with LMS platforms like Canvas, Moodle, and Blackboard. The product is built for institutions and enterprises: per-seat pricing, credit allocations, an API, and grading/education workflows. It publishes high internal accuracy rates, and its multilingual coverage is a genuine differentiator for non-English use cases where many competitors are weaker. As with every AI detector, independent testing tends to land below the vendor's headline numbers, and false positives remain a real concern in academic settings. Copyleaks is a solid choice where multilingual plagiarism plus AI screening and LMS integration matter, provided results are used as a starting point for review rather than a final judgment.