Kubernetes USES docker, so it's not a competitor. The main benefits over the competing docker project, Docker Swarm, is that it does WAY MORE, is 100% free and

Kubernetes USES docker, so it's not a competitor. The main benefits over the competing docker project, Docker Swarm, is that it does WAY MORE, is 100% free and open source, and has much better adoption. I would argue that with Docker Swarm you have to bring the glue yourself, and it doesn't really solve any of the hard problems. Kubernets on the other hand is an all-in-one package that solves a LOT of hard problems for you.