CopyLeaks

CopyLeaks AI-based algorithms are capable of analyzing text in over 100 languages.
Their website offers a lot of useful tools, including a text comparer, a code checker, a duplicate file finder, and a website comparer.

CopyLeaks even offers an automatic grading tool for teachers and the Copyshield program to protect your website from plagiarism.

The free version allows you to scan up to 20 times per month but has some limited features.If you are willing to pay a monthly subscription, you can get a lot of conveniences.

Pros:

• Provide comprehensive reporting system
• Provide exclusive automatic scoring tool
• Integration with MS Word, Google docs,...
• Article information security
• Compare the level of overlap between 2 articles
• Suitable for students who need to test copy documents based on available online information sources and database repositories

Cons:

• Copyleaks lets you scan no more than 2500 words per month for free.
• For more you need to subscribe to their paid version
  

Link: https://copyleaks.com/