In Chapter 2, Different Components of Chef's Anatomy, we discussed a variety of Chef server installations, in which, the on-premises Chef server installation is one of the most important.
As per the official blog of Chef posted on August 19, 2013 at https://www.chef.io/blog/2013/08/19/introducing-enterprise-chef/, Private Chef and Hosted Chef were combined and renamed as Enterprise Chef, which offered both as on-premise software and as a hosted service of Chef. This move was strategic to align with the Fortune 1000 businesses that represent the majority of Opscode's total sales.
In on-premises Chef, different types of services work together to provide on-premises automated solutions. On-premises Chef works like a Private Cloud; meaning, we can manage and automate our infrastructure within our firewall and have a flexibility of choice.