Public clouds are designed for everyone but there are a lot of customers that need a private version of the cloud. Sometimes, they need physically isolated data centers and networks located in their own country. These private clouds offer Platform-as-a-Service (PaaS), Infrastructure-as-a-Service (IaaS), and Software-as-a-Service (SaaS) service models just like other data centers. Some features on public cloud offerings might be delayed released in a private cloud as compliance and security complicate deployment.
As the race for private government clouds is heating up, governments are becoming more strict about their citizens' data. More and more private clouds are coming up. Some of the popular offerings in this area include Azure China, Azure Germany, Azure for US Government, AWS Germany, AWS China, Google for Government, and the list goes on. Compliance, data privacy, and security restrictions for these clouds apply not only to cloud customers but also to cloud providers. For instance, Azure developers would have to go through compliance requirements before their change is deployed in a private cloud.