Can Viper check plagiarism from books and offline sources?

Viper is not suitable for checking plagiarism in books and offline sources because it is mainly designed to compare documents with online content and certain online databases. Its limited database restricts its effectiveness in checking offline sources.

Viper struggles to identify plagiarism from subscription-based platforms like academic journals or premium content providers due to its reliance on publicly available content. Turnitin or Unicheck are more effective for detecting content from subscription-based or paywalled sources due to their partnerships with publishers.

Viper differ from all the other plagiarism checkers as:

• It is much faster than any other plagiarism checker
• Viper offers two free online scans per month for documents up to 5,000 words each
• Doesn’t ask the user for subscription, they can simply just buy the credit points and move forward with plagiarism checking.

The number of credits that the user possesses, and the length of each document determines how many documents they can check with Viper. For example,

• Free module: New users can check out for free with up to 5,000 words with one credit.
• Paid module: Documents over 5,000 words require more than one credit.
• Credit bundles: There are credit packages ranging from three to fifty credits. Each credit gets less expensive the more of them you buy.

No, user cannot include certain sources from the Viper plagiarism report, unlike other plagiarism software like Turnitin. This limitation can result in more false positives, especially when citations or commonly used phrases are flagged as plagiarism.