Although Chef trails Puppet by around four years or so, it has still managed to develop a broad client base with elite firms, which include Intuit, GE Capital, and Target among many others.
If your firm is a Ruby on Rails shop, there's a good chance you'll love Chef for the ease of using Chef's domain-specific language, which ensures that everyone on your technology code understands the code. Chef also integrates with a wide range of cloud providers, including, but not limited to, OpenStack, HP Cloud, Google Compute Engine, Joyent Cloud, Rackspace, IBM SmartCloud, VMWare, and Amazon EC2 among many others.
Users can download any of the 3,000 cookbooks for IT automation on the Supermarket, which, while having a smaller spread than Puppet's, should be useful enough for users. The Supermarket also contains plugins and tools, all of which will help users automate their IT processes and improve visibility.