Kubernetes and Docker are two separate technologies that can complement each other when used correctly. Kubernetes provides an API to orchestrate containers, simplifying the development process, optimizing IT costs, and offering cloud migration options. It allows for decreased development timeframes, optimized IT costs, and cloud migration options. On the other hand, Docker enables developers to build, share, and run various apps, providing versatility, a consistent isolated environment, and easy collaboration. Although they are both open-source cloud-native technologies, Kubernetes is designed to run in a cluster using multiple virtual machines, whereas Docker focuses on packaging containerized applications using a single node. Despite their differences, both can be used separately or together, with the latter being a popular choice for many enterprises serving microservices development needs.