What is the difference between Docker registry and Docker Hub?

Docker Registry is a general term for a server that stores Docker images. It can be either a public or private server.

Docker Hub is a public Docker Registry provided by Docker Inc., where images can be stored and shared for free or via subscription.

Main differences:

• Docker Registry is a technology/protocol that allows storing and sharing images.
• Docker Hub is a specific public service (implementation of Docker Registry) accessible to everyone.

You can set up your own private Docker Registry for storing images within your company, and use Docker Hub for public distribution.