This document compares the wiki collaboration platform XWiki to Confluence and Sharepoint. It outlines XWiki's main differentiators as being open source and community-based development, high configurability directly in the wiki, and structured data as a built-in feature. It discusses XWiki's open source nature, extensive customizability options through UI extensions and configurations, built-in structured data capabilities, and ability for non-developers to create simple applications. Feedback from users praises XWiki's functionality, extensive extensions, flexibility, active community, and quality over other wiki systems like Confluence.