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The cloud model delivers quality service to the customers, but not free from some of the constraints given below:

 Dependability on hypervisor: As hypervisor controls all access to VMs and monitors the environment, the hypervisor failing or crashing or an attack on it by hackers may lead to performance degradation.

 Standardized platform: Each organization has its own APIs, services, policies and different rules and regulations. So in a cloud platform, it’s quite difficult to maintain the combination of all those things from various organizations and interoperability of all the applications is also a mammoth task.

 Energy efficiency: Although cloud computing provide various types of on-demand services and running applications, it requires a lot of power. And hypervisor monitoring system also requires a huge amount of electricity to monitor the access to VMs. So, energy efficiency is also a concern in cloud computing.