IaaS is an abbreviation that stands for Infrastructure as a Service (“infrastructure as a service”). This model provides for a cloud provider to provide the client with the necessary amount of computing resources - virtual servers, remote workstations, data warehouses, with or without the provision of software - and software deployment within the infrastructure remains the client's prerogative. In essence, IaaS is an alternative to renting physical servers, racks in the data center, operating systems; instead, the necessary resources are purchased with the ability to quickly scale them if necessary. In many cases, this model may be more profitable than the traditional purchase and installation of equipment, here are just a few examples:

• if the need for computing resources is not constant and can vary greatly depending on the period, and there is no desire to overpay for unused capacity;
• when a company is just starting its way on the market and does not have working capital in order to buy all the necessary infrastructure - a frequent option among startups;
• there is a rapid growth in business, and the network infrastructure must keep pace with it;
• if you need to reduce the cost of purchasing and maintaining equipment;
• when a new direction is launched, and it is necessary to test it without investing significant funds in resources.

IaaS can be organized on the basis of a public or private cloud, as well as by combining two approaches - the so-called. “Hybrid cloud”, created using the appropriate software.