Copyleaks is the best plagiarism checker for website owners. Simply add your website domain and check for online plagiarism. Copyleaks ensure that nobody uses you website content without your permission. For any new copy that Copyleaks will find you will be notify.
- Plagiarism Checker
- Freemium • Proprietary
- Windows
Best alternatives are 
Unicheckand
WP Copy Defender
3 alternativesUnicheckandWP Copy Defender