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Which cloud model is best for your company?
Choosing the right cloud computing solution can be a challenge for organisations, as each model offers unique benefits and uses. To help you make the best decision for your organisation, we’ll take a closer look at the three main models – Software as a Service (SaaS), Infrastructure as a Service (IaaS) and Platform as a Service (PaaS). Each of these models offers different benefits and possible applications.
Firstly, we should address the question
To better understand the differences between IaaS, PaaS and SaaS, it is helpful to first explain the common term ‘as a service’. This term generally describes cloud computing services that are provided by a third-party provider. These services allow you to focus on essential aspects of your business, such as developing your software or maintaining your customer relationships.
Managing your local IT infrastructure can be a demanding and time-consuming task. If your hardware and software are operated entirely on-premises, the entire responsibility for managing, maintaining and updating them falls to you and your team. Cloud computing simplifies this process by allowing you to delegate some or all of your IT infrastructure to an external provider. This allows you to focus your resources and attention on other, more strategic tasks.
IaaS provides virtual IT resources such as servers, networks and storage via the internet. Companies can use, configure and manage these resources as required without having physical hardware on site.
Examples of IaaS providers are Amazon Web Services (AWS), Microsoft Azure and Google Cloud Platform.
IaaS is ideal for companies that require flexible and scalable IT resources, e.g. for development and test environments, web applications or large-scale data processing.
PaaS provides a platform that enables developers to create, test and deploy applications without having to worry about the underlying infrastructure. It provides development tools and environments based on the provider’s cloud resources.
Examples include Microsoft Azure, Google App Engine and Heroku.
PaaS is particularly suitable for companies that want to develop customised applications and bring them to market quickly. It offers an ideal environment for the rapid development, testing and provision of software.
SaaS offers software applications over the Internet. Instead of installing software locally, users access the application via a web browser. The provider takes care of everything from the infrastructure to regular updates and security checks.
Examples of SaaS include Google Workspace, Salesforce and Microsoft 365.
SaaS is ideal for companies that need ready-to-use software solutions without having to worry about the underlying infrastructure. It is particularly suitable for standard applications such as e-mail, CRM systems or collaboration tools.
The differences between IaaS, PaaS, and SaaS in cloud computing relate to the level of control and responsibility you retain in each model. Each of these models is an alternative to managing your own local data centre. Depending on the model chosen, the service provider takes over different parts of the computing stack.
The following diagram illustrates how the management of components is divided between IaaS, PaaS and SaaS and shows which tasks are performed by you and which by the cloud provider.
| On-Premise | IaaS | PaaS | SaaS | |
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Application |
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Data & Configuration |
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Runtime |
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Middleware |
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OS |
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Virtualization |
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Servers |
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Storage |
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Networking |
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Hardware |
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You manage
Service provider manages
In conclusion, cloud computing enables companies to manage their IT resources efficiently and focus on their core competences. Choosing the right model and provider is crucial to meeting individual needs and maximising the benefits of the cloud.
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