Hi! My friend used Viper to check for plagiarism before. However, he told me that the result is quite different from turnitin, which his report from viper is 0% and from turnitin is 4%. I'm looking for an alternative as well if anybody can recommend one.
Hi. For my self I used to check my paper by Plagiarism Detector program. This is not free but you can check your paper with demo version by diving it into many part. Recently, I've used Turnitin.