As alluded to earlier, PaaS and IaaS are both part of a broader cloud computing environment that enables users to access infrastructure, platforms, and software services through cloud providers. However, as you move from IaaS to PaaS and on to SaaS, each of these cloud solutions offers a further layer of services and support not available in the other. When you look at PaaS vs IaaS, you are moving from simple infrastructure support via the cloud to include PaaS software designed to build on what the infrastructure is offering.
IaaS consists predominantly of data storage, networking, and security that form the backbone of IT infrastructure. Rather than worrying about servers, storage space, and data centers, users can run PaaS software and SaaS applications of their own using virtual machines in a cloud-based infrastructure network.
PaaS solutions take it one step further by providing both the infrastructure and the platform necessary for developers to create applications. The tools offered in a PaaS environment provide quick deployment of resources for application development and offer scalability to meet changing needs for small businesses and enterprise companies alike.