Applications can be deployed as services (or micro-services) in a Swarm cluster.
Application can be deployed using a combination of pods, deployments, and services.
Installation is manual and it takes serious planning to make Kubernetes up and running.
Swarm is simple to install as only one set of tools are required to learn to build upon environment and configuration.
Slow Scale Response
Detect Unhealthy Pods
HA Can be Replicated
Kubernetes offers a unified set of APIs and strong guarantees about the cluster state, which slows down container deployment and scaling.
Swarm can deploy containers faster, this allows fast reaction times to scale on demand.
Swarm provides high availability as services can be replicated in Swarm nodes.
Kubernetes, load-balancing services detect unhealthy pods and remove them, this supports high availability.
Logging and monitoring
Both Swarm and Kubernets have its own advantages. Docker Swarm is preferred in environments where simplicity and fast development is favored. Whereas Kubernetes is suitable for environments where medium to large clusters are running complex applications.