1 Database and algorithm: PaperSS's database is relatively small. In contrast, the databases of PaperPP and PaperYY are more extensive and contain more academic resources.
Scope of application: PaperSS is widely used in overseas universities and international publishing houses. PaperPP is suitable for duplicate checking of all kinds of papers, including graduation papers and periodical papers. PaperYY is mainly aimed at duplicate checking of undergraduate graduation thesis.
3 Price: The price of PaperSS is relatively high, while the prices of PaperPP and PaperYY are reasonable, which is suitable for the needs of most users.
These three paper duplicate checking websites all have their own characteristics and advantages. In addition to the above three, Paper series also has free duplicate checking systems such as paperfree and papertime. Paperfree provides the functions of machine weight reduction and online weight modification, which can modify the paper while checking the weight, greatly improving the efficiency of paper modification. Users can choose a suitable website according to their own needs to check the duplicate of papers.