What is IaaS or Infrastructure as a Service?

Stackscale's servers for IaaS

Iaas, short for Infrastructure as a service, is a cloud computing solution that consists of provisioning and managing computing resources over the Internet; such as servers, storage, networking and virtualization. This computing model emerged in the early 2010s and it is also known as Hardware as a Service (HaaS). Since then, IaaS has become the standard model for numerous types of workloads.

IaaS, PaaS and SaaS are the main three cloud computing service models. Each cloud service model covers different user and company needs, and provides a different level of control, security and scalability. In this article, we will focus on the IaaS model and its advantages

What kind of resources are usually provided on IaaS?

IaaS providers deliver on-demand computing capacity, storage and network connectivity over the Internet, on a pay-per-use or pay-as-you-go basis. It is also possible to offer specialized hardware such as FPGAs or GPUs for Artificial Intelligence (AI) projects. The physical and virtualized resources offered by cloud service providers allow businesses to run applications and workloads in the cloud.

What are the benefits of IaaS?

IaaS is very advantageous for companies in terms of flexibility, efficiency, scalability and security. By “renting” computing resources, instead of purchasing them, companies save time and money, and increase agility. But let’s go into more detail about what are the advantages of using Infrastructure as a Service solutions.

Less capital expenses

IaaS makes it easier for companies to develop big projects without investing a great amount of money on IT equipment. Thanks to it, companies can also save a lot of time and efforts. By outsourcing their infrastructure, companies eliminate the capital investment of setting up, managing and maintaining an on-premises data center. With this cloud service model, companies only pay for the resources they need and use. IaaS providers are responsible for managing the data centers hosting the physical machines that are made available to customers over the Internet, either virtualized or not.

In terms of costs and investments, IaaS is the way to optimize expenses by delegating the management of servers or nodes, storage and networking to a cloud computing provider. In some cases, you can also delegate the virtualization layer to your provider. At Stackscale, for instance, we offer IaaS with virtualization in the form of Private Cloud and IaaS without virtualization through bare-metal servers.

IaaS, what you'll manage and what your IaaS provider will manage

Besides, avoiding the purchase and management of hardware does not only save companies money. It also allows their internal IT teams to focus on tasks that are more valuable to the core business.


When deploying an IaaS platform, companies remain in control of their applications, data, runtime, middleware and operating system (OS). They are still responsible for purchasing, configuring and managing their software. But their IaaS provider takes care of housing, managing and monitoring the technical infrastructure, so that everything works perfectly.

Furthermore, as mentioned above, the company’s IT team does not have to worry about the creation, management and maintenance of the physical infrastructure. So, by migrating from an on-premises model to an IaaS model, companies will have more time to focus on the core business while their provider’s specialized team does what it does best: taking care of the infrastructure. 

Maximum security and redundancy

Security is another advantage of Infrastructure as a Service. IaaS providers set up their infrastructure in big data centers, which implement the strictest physical security and redundancy measures. All of which add up to the security measures put in place by the own IaaS providers. At Stackscale, for example, all elements within our infrastructure are redundant to provide a fault-tolerant service — from the power feeds to the nodes themselves. So, the security level offered by cloud service providers will virtually always be higher than that a company can attain in house.

Moreover, IaaS providers usually provide backup and DR solutions to help companies keep their data protected. This is also important in terms of costs, since companies would need to invest a great amount of money in order to achieve the high availability, business continuity and Disaster Recovery cloud providers offer. Besides, deploying a DR solution from scratch also requires a considerable amount of human resources. For further details about DR planning in the cloud, here is a quick guide about how to build a Disaster Recovery plan.


With IaaS, companies have more flexibility to scale their infrastructure up and down, on demand, as their project evolves. They can adapt their computing resources to their needs anytime. Besides, businesses can prepare their infrastructure to meet seasonal demand, easier and faster. Moreover, this kind of computing solution allows companies to always benefit from the latest technologies. Since IaaS providers, like Stackscale, have an expert team who stays tuned to the latest trends and technologies. In addition to working with innovative technologies to offer maximum performance.

What is the difference between IaaS and virtualization?

The term “virtualization” only refers to the capacity to simulate a physical computer into a virtual environment; which enables greater security and an optimized use of the resources. IaaS is born from this concept, as a service model that allows making the most of the servers’ resources and virtualizing at more competitive prices.

What is the difference between IaaS and PaaS?

On the one hand, the IaaS or Infrastructure as a Service model provides the computing resources companies need to host, build and run their services. On the other hand, the PaaS or Platform as a Service model provides an environment for developers to build and deploy applications.

To sum up, thanks to IaaS companies will not be limited by their IT equipment. They can choose IaaS for deploying web applications, running a CRM, Big Data analysis, storing data, backup and Disaster Recovery planning, etc. They just need to choose the provider that better fits their needs and business strategy, so that they can make the most of it. Some examples of IaaS providers are: Stackscale, AWS, VMware and OVH. Besides, within the IaaS model, there are different types of cloud among which companies can choose depending on their needs and goals.

Do you want to know how we can help you optimize your IT resources? Please do not hesitate to contact us. We will be happy to know more about your project and see how we can grow together.

Dutch version: Wat is IaaS?

Share it on Social Media!

Private Cloud

Predictable performance, extreme redundancy, flexibility... Discover what Stackscale's Private Cloud can offer to your project.