Copyleaks AI Detector

Copyleaks AI Detector is an online service for checking whether a text was written or edited with generative AI.

Who it’s for

It’s used by educators and organizations that need to verify authorship and AI usage in written content, including:

• Teachers, schools, and universities
• Companies and internal teams
• Editorial teams and publishers
• Freelancers and agencies

Accuracy and detection approach

Copyleaks reports up to 99% accuracy, supported by independent studies. The detector evaluates writing style, structure, and statistical text patterns to distinguish human writing from LLM-generated content. It’s designed to identify AI output even when it’s blended with human writing or has been revised using tools like Grammarly and other AI assistants.

Features and integrations

Beyond web-based scanning, Copyleaks offers options for larger workflows:

• Higher free scanning limits compared with ZeroGPT, GPTZero, and QuillBot
• Enterprise plans for organizations
• API access for integrating into LMS, CMS, assignment-checking systems, and internal processes