Osmose QA is a quality assurance tool that analyzes OpenStreetMap data to detect issues using over 200 rules. It provides interactive maps and reports to help identify missing data, errors, and suggest improvements. The tool splits analysis of OpenStreetMap data among over 70 countries and regions to allow for localized knowledge and practices. It also integrates third-party open data sources like postal office locations in France to detect discrepancies between OpenStreetMap and the additional datasets.