How about checking the duplicate of Paperrater's paper Is it a free paper duplicate checking software?

You can check the copy for free, but only for the first time.

There is a charge for the later period, and there is no completely free paper duplicate checking software.

However, the duplicate checking software in this paper has high accuracy and can ensure that it can pass the duplicate checking in the school.

Go to the website and have a look. The cost of paperrater paper duplicate checking software is 1 yuan 1000 words per word.

I hope I can help you.