Plagiarism checker

I am looking for a freelancer to create a new plagiarism checker tool that will be used to detect similarities in academic papers. The plagiarism checker needs to be able to integrate with Microsoft Word, and should have advanced plagiarism detection capabilities such as being able to detect plagiarism involving paraphrasing and synonyms. This is an important tool in ensuring authenticity of papers, and I am looking for a top-quality product that will accurately detect the use of content from other sources.