What is the difference between Chef automate and chef server?

I am setting up chef automate in azure. but i have confusion regarding chef automate and chef server.

Chef Server is an open-source project which is the server half of the chef-client/Server pair. It mostly handles data management for the chef-client, storing all the information needed for running a Chef converge (like cookbooks, roles, data bags, etc). Chef Automate is a commercial product of Chef Software Inc and includes some more advanced features that are targeted at larger organizations like a web dashboard, compliance analysis system, and CI/CD service.

thanks for your replay.
one more question regarding chef server and chef workstation.
Can i installed both(CS and CW) on same machine? is there any conflict.