What sources does Viper scan against?

Viper's plagiarism checker searches across a vast collection of online and academic resources to identify any similarities in your work. Our detection system checks billions of documents and web pages to ensure that your results are as thorough and accurate as possible.

The scan covers:

• Academic journals and publications - including thousands of open-access titles from leading publishers such as Wiley, Elsevier, and Frontiers.
• Web content - trillions of indexed web pages, articles, blogs, and public repositories.
• Internal documents - optionally, you can scan against previously submitted work stored securely in the internal database (if the internal scan option is selected).
• Specialist and technical sources - including limited access to publicly available code databases and research archives.

This wide-ranging search helps detect direct copying, paraphrasing, and rephrased material across a diverse set of global sources.

By combining open-access academic data, online content, and user-submitted materials, Viper provides one of the most comprehensive plagiarism checks available - without ever publishing or sharing your documents.