Copyscape is the best online Plagiarism checker tool no doubt but there are other online plagiarism tool to check content theft. If you are worried about content theft, check my earlier guide on how to prevent content theft.
In addition to Copyscape, here are 6 additional tool (alternative to copyscape) where you can check whether your content is copied by someone else.
Tools to check Content Theft
Following are the 7 good tools to check online plagiarism for your site. You can use them free and also some of them have premium version to check the copied content more accurately. However for starter the free version should be good enough to start with.
There are some more tools to check plagiarism online but I believe above 7 are good enough to check content thefts and fight you better with content scrappers.
Moreover you can install free TYNT script to get a backlink from your copied content. This script will help you to automatically get a backlink on the footer of copied content. This might also create a problem for auto-content scrappers to copy your contents due to backlinks and help you to safeguard a little from content theft.