Much of Docker (but not Desktop) is open source under the Apache v2 license. Docker registries contain images, and the Docker Hub is a widely used public registry. The Docker client is a command-line utility that calls the API of the Docker daemon. The Docker daemon is a background application that manages and runs Docker images and containers. Docker containers are runnable instances of images. Docker images define the contents of containers. The Docker platform has a number of components, of which Docker Desktop is just one part. The $5/month Pro and $7/month Teams subscriptions continue as before, but a new $21/month Business subscription adds features including centralized management, single sign-on, and enhanced security. There are no changes to the command-line Docker Engine. The Register reports: The company has renamed its Free plan to 'Personal' and now requires that businesses with 250 or more employees, or higher than $10m in annual revenue, must use a paid subscription if they require Docker Desktop. Docker will restrict use of the free version of its Docker Desktop utility to individuals or small businesses, and has introduced a new more expensive subscription, as it searches for a sustainable business model.
