​​While Docker has been the go-to solution for containerization, the container ecosystem has evolved much, introducing a few powerful alternatives that address some of the pain points in modern development environments. This chapter goes through four of the most popular Docker alternatives, Podman, Buildah, Kaniko, and img, each of which offers unique advantages in different containerization needs. From Podman's daemonless architecture and improvements in security compared to Docker through Buildah-specific image building capability, to a CI/CD-optimized setup by Kaniko, and through img's easier container image construction, these applications represent the emerging wave of container solutions. Whether it's security, efficiency, or requirements of specific use cases, all these Docker alternatives are necessary for understanding how one should proceed during the journey toward containerization.