In the world of manufacturing and quality management, two prominent standards—ISO 9001 and Good Manufacturing Practices (GMP)—play critical roles in ensuring product quality, safety, and consistency. While both are designed to uphold high standards, they differ significantly in scope, application, and focus. Understanding these differences is crucial for organizations operating in regulated industries, particularly those involved in manufacturing, pharmaceuticals, food, and cosmetics. This article provides a comprehensive comparison of ISO 9001 and GMP, highlighting their unique features, requirements, and implications for businesses.