
Pros
Cons
Free
Built into Docker
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Kubernetes is more powerful and feature-rich but complex. Swarm is simpler and easier to learn, built into Docker. Use Swarm for smaller deployments; Kubernetes for large-scale, complex orchestration.
No, but its development has slowed. Docker focuses on Docker Desktop and Docker Hub now. Swarm is stable and works well for simpler use cases, but Kubernetes dominates for new projects.
Yes, Docker Swarm is completely free and built into Docker Engine. There's no separate installation or licensing required.
Source: docs.docker.com