A user might be getting different results from other plagiarism checkers as:
- There could have be using different set of content. Some might be using the book database while others might prefer web content.
- The algorithm of each software is different from each other.
- Tools have varying rates of database updates. What gets flagged could vary depending on which ones contain more recent content and which ones don't include the most recent books or websites.
- Different tools have different settings for how sensitive they are to plagiarism, thus one tool may flag more or fewer portions than another.