Hi Danilo,

Some sites available to detecting plagiarism:

http://smallseotools.com/plagiarism-checker

http://seoabzar.com/plagiarism-checker

http://www.anticutandpaste.com/

http://www.copyscape.com/

http://www.turnitin.com/

http://smallseotools.com/

https://academicplagiarism.com/

http://www.dustball.com/cs/plagiarism.checker

http://plagiarism-detect.com

http://www.duplichecker.com

http://www.scanmyessay.com

https://www.paperrater.com/plagiarism_checker

http://www.effectivepapers.com/plagiarism-checker-for-students.html

http://www.plagiarismsoftware.net/

https://www.scanmyessay.com/

http://www.ithenticate.com/

https://www.diffnow.com/

https://text-compare.com/

https://www.diffchecker.com/

http://www.textdiff.com

See the article 'Top 10 Free Plagiarism Detection Tools For eLearning Professionals (2017 Update)' (https://elearningindustry.com/top-10-free-plagiarism-detection-tools-for-teachers)

What plagiarism software can you recommend?

You can also refer to the following RG link / links embedded within the link:

https://www.researchgate.net/post/Plagiarism_Software

I recommends Turnitin

A good program to discover plagiarism is Turnitin program