Which is the Best Paraphrasing Tool QuillBot or Grammarly? If you are a content writer or any type of business website owner, then you like your content grammatical and spelling error free. To deal with this situation you need the Best Plagiarism Checker. Both these paraphrase tools are equipped with functionality like grammar checker, article rewriter (that uses a standard synonym). So check out my in-depth comparison guide to both this paraphrase tool on Internet Highway.