The world of cloud computing is vast, and while there are a few dominant players in the cloud vendor space, there are other parts of the ecosystem that are critical to success. How to decide which cloud vendor to use? What types of partners should be considered and what do they bring to the table? How will procurement change or stay the same in the cloud? How much do you want to rely on the cloud vendor to manage services? These are all important and valid questions that will be answered in this chapter.