Infrastructure as a service (IaaS) is a type of cloud computing that lets you allocate compute, network, storage and security resources on demand. IBM Cloud IaaS customers can scale and shrink resources as needed around the world in more than 60 data centers. You have access to the full stack of compute, down to the bare metal, for more control than other cloud resources. This flexibility lets you customize hardware to your exact specifications to meet your workload's precise demands.