Rancher is an open source software that makes it easy to deploy and manage Docker containers and Kubernetes in production on any infrastructure. Developed by Rancher Labs
License: Open Source
Apache Mesos is a distributed systems kernel that can manage various workloads, offering flexibility and scalability but with a steeper learning curve. Rancher, on the other hand, is more user-friendly and focuses on container orchestration, primarily through Kubernetes, making it easier for teams to manage and deploy containerized applications.