The GroupDocs.Comparison for Cloud plugin for Typo3 CMS allows you to embed and compare two Word documents, as well as PDF files and Excel spreadsheets, from within your website.

GroupDocs.Comparison is a web-based app that lets you compare documents online using a browser. Simply upload two Word documents and let GroupDocs Comparison find the difference between them. It even allows you to merge the differences and export the document to a Word file!