Copyleaks

Copyleaks is an AI checker tool. Copyleaks Plagiarism Checker scans text, files and code for identical, lightly edited and paraphrased matches across trillions of web pages, open access journals and code repositories, with reports, Google Docs and LMS integrations plus a white label API.

Copyleaks Plagiarism Checker is a web based originality tool that compares submitted text against a wide body of published and indexed material, then returns a similarity report with links to the suspected sources. The vendor indexes more than 60 trillion websites and search engines, over 16,000 open access journals, a million internal documents and more than 20 code repositories for each scan. The tool distinguishes three layers of matching: identical text, minor changes such as tense edits, and paraphrased passages rewritten with different wording. It also reports omitted words, meaning the share of the document excluded from checking when settings like ignore quotations are active. The product is aimed at several distinct audiences. Educators and institutions use it to review student work, with options to run it inside learning management systems such as Canvas, Blackboard, Moodle, Brightspace, Schoology and Sakai. Publishers, marketers and SEO teams use it to confirm that articles and landing pages are original before publication. Developers and platform owners can call a white label API, with client libraries listed for C#, Java, Node, Ruby, PHP and Python, to embed scanning into their own products. Cross-language detection matters for multilingual work: a Spanish document can surface matching material in Chinese, German or Portuguese, and the service handles more than 100 languages overall. In practice a scan starts with pasted text on the public page or a file upload on the platform, since file scanning is reserved for account holders. Scans can also run inside Google Docs through an add-on, and recurring scheduled scans can monitor content on an ongoing basis. Reports show source links and can be customized, downloaded and shared; the site publishes an interactive sample so you can see the format before committing. Against alternatives, Copyleaks positions itself as an enterprise grade option, pairing plagiarism checks with a separate AI detector and grammar checker. Security claims include GDPR compliance plus SOC 2 and SOC 3 certification. Accuracy figures on the site come from internal English language testing, so treat the 99 percent claim as a vendor benchmark rather than an independent audit. The page frames a free account as the entry point and a demo as the route for teams.