What is Cloud Computing?

Let’s take you from the top – from cloud computing basics, to securing the best strategy for your business.

Technology can be so exciting for growing a business. But it’s also daunting if you’re not sure about it. For business leaders, cloud computing gets presented as this essential, game-changing technology – but if you’re not a tech head, it can feel like an unnecessary, risky move.

So – what is cloud computing?

At its simplest, cloud computing is a way to access and store data and applications over the internet, instead of on your own computer.

It’s the modern, flexible alternative to owning and managing a lot of expensive server hardware. Instead, you can tap into a huge pool of computing power and services on-demand – like plugging into the national grid instead of running your own generator.

In this guide, we’ll explain the fundamentals, starting with the concept, then break down the main types of cloud (public, private, and hybrid), and explore their advantages and disadvantages. 

We’ll focus on the private cloud model, for companies that need greater control, security, and long-term cost savings.

Let’s get to it…

What is cloud computing?

Imagine you need electricity to power your house. Would you rather:

Build a power station in your garden, or;

Connect to the grid and pay for what you use?

Cloud computing applies this same utility model to computers. Instead of investing large sums upfront to buy, house, and maintain your file storage, software, and computing power, you rent it all from a major provider.

Data centres house all of the hardware, running 24/7, and let you access it over the internet from any device with logins and permission.

And it really has transformed how businesses operate. 

Cloud computing offers remarkable business agility and speed. You can deploy new applications, render off massive files, crunch through tons of data, or increase your storage in minutes – not months. It turns the large capital expenses of buying hardware into predictable operational ones, where you typically only pay for the resources you consume.

Cloud computing services provide effortless scalability; your IT can seamlessly grow or shrink with your business needs, handling traffic spikes without breaking a sweat.

From startups to global enterprises, organisations use the cloud for everything from hosting customer-facing websites and email systems, to performing complex data analysis, developing software, and robust data backup and disaster recovery plans.

Silver linings: public, hybrid, and private cloud

There are three main types of cloud computing: public, hybrid and private cloud.

They all fundamentally work the same way – other computers do your computing. The difference between them is who manages the infrastructure, and where it is located. Choosing the right model is an important strategic decision for your business – one that balances cost, control, security, and compliance.

Public cloud: convenience, speed and scale

The public cloud is the most common entry point. You probably use it at a consumer level right now – hosting your email account or iCloud storage. Business public cloud goes a step further, allowing you to actually compute (run applications and software) in the cloud, on cutting edge hardware.

In the public cloud, third-party providers deliver services over the internet – like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform. 

Think of it like renting an upmarket flat in a large, well managed block. You don’t own the building, but you get to live in a fancy, upmarket location – with a swimming pool, a gym, and a great view. The building owner (the cloud provider) is responsible for all the maintenance, security, and upkeep.

You, as the tenant, just furnish your flat (with your data and applications), pay the rent – and enjoy the amenities.

Advantages of public cloud:

• There is virtually no upfront capital investment. You operate on a pay-as-you-go model
• You have instant access to nearly limitless resources to handle any workload, giving you massive scalability
• There’s zero maintenance. The public cloud provider handles all hardware updates, security patches, and physical maintenance
• You get immediate access to the latest technologies – from artificial intelligence to big data analytics

Disadvantages of public cloud

• Less control: you rely on the provider’s policies for security, compliance, and performance
• Without careful management, usage can sprawl – leading to unexpectedly high bills
• While highly secure, your “rented flat” (to continue the analogy) is in a shared “building”. This can be a concern for organisations with the strictest regulatory requirements
• Data residency is not guaranteed. The servers you’re actually accessing and using could be local, or on another continent. This is a concern for sensitive data and organisations bound by data residency laws

The private cloud: security and control

A private cloud is one dedicated solely to one organisation. It can be physically located on-site, or hosted by a third-party data centre specialist.

Using our property analogy, this is like owning a detached house. The entire property, from the foundations to the roof, is yours. You have complete control over the architecture, security systems, and who has access.

This model is often chosen by businesses in highly regulated industries (finance, healthcare, military, legal), those handling extremely sensitive intellectual property, or any organisation that requires guaranteed performance – and cannot risk sharing bandwidth on a public cloud.

Advantages of private cloud:

• You define and enforce your own stringent security protocols and can tailor the environment to meet specific regulatory standards (like GDPR)
• With dedicated private cloud resources, application performance is consistent and reliable, unaffected by other workloads
• The infrastructure can be designed and configured to meet the exact technical needs of your business – running lean or with plenty of headroom
• Over time, the cost savings are dramatic compared to public cloud, especially when reaching maturity

Disadvantages of private cloud:

• Private cloud requires a capital investment in hardware and software – much like buying a house
• Your IT team is responsible for ongoing maintenance, updates, and operational management, which demands skilled staff
• Scaling up requires purchasing and installing new hardware, which takes more time than clicking a button in a public cloud solution

At deeserve, we offer an alternative way of doing private cloud – one without the initial, often heavy, upfront investment – which we’ll get to shortly…

The hybrid cloud: the best of both worlds

The hybrid cloud is, as the name suggests, a blend of public and private clouds, connected together to allow data and applications to move between them. 

Picture this as a main house that you own exclusively (private cloud) and a holiday cottage you occasionally rent (public cloud). You live in and fully control the main house for your daily life, but when you have a big family gathering, you go to the holiday cottage for the extra space.

This model offers strategic flexibility. A company might run its core, sensitive database and legacy applications in a private cloud for security, while using the vast compute power of the public cloud for seasonal marketing campaigns, development testing, or big data analytics. 

Public clouds can be spun up or down almost instantly, so there’s never any wastage.

What is private cloud and how can it help control costs?

The private cloud is often misunderstood as an expensive, on-premise data centre. 

But a modern private cloud solution lets you use a data centre of your choosing, anywhere in the world, with a fully owned and controlled environment installed inside it. This gives you full control over data residency, in a world-class data centre, without having to build the infrastructure yourself – just the racks.

See our UK data centre partners and our US data centre

It’s cheaper to run always-on workloads on a private cloud than in the public cloud – so while the upfront investment is higher, a private cloud can give you long-term cost control and efficiency – particularly for predictable, steady-state workloads.

About that upfront private cloud investment…

If you want to run a private cloud setup, but don’t want to shoulder the upfront cost, deeserve has got you covered.

With a deeserve private cloud installation, we can buy and own the hardware you need, and rent it to you.

After setup and installation, you just pay a monthly, set-in-stone cost. Our clients have found major value in this, because we take away the pain of capital investment, setup, and ongoing management. It’s an all-inclusive private cloud solution, without the heavy investment!

Predictable total cost of ownership

Public cloud bills are variable – a private cloud shifts this to a capital expenditure with predictable, steady running costs. For applications that run 24/7/365 at a consistent level, the monthly cost of renting equivalent public cloud resources can exceed the upfront cost of owning a private cloud. 

It’s like the difference between a 30-year mortgage and a lifetime of renting; one has a known end point.

No more surprises

It’s so easy for developers to spin up new servers in the public cloud, run a test, and forget to turn them off. 

It’s so easy to scale up, and let it creep over time. Or for an application to use more resources than anticipated. These costs accumulate silently, until your next bill smacks you with a massive outlay you weren’t expecting. 

With a private cloud, you own a fixed pool of resources. While you can’t exceed them, you also can’t receive an unexpected invoice for doing so. This forces more disciplined and efficient resource usage, and a considered approach to your compute cycles.

Optimised for consistent workloads

The public cloud’s pay-per-use model is brilliant for spiky, unpredictable traffic – but if your core business applications need a steady, known amount of power, day in and day out, you are effectively renting that capacity at a premium. Owning that baseline capacity in a private cloud can be far more economical.

Finding your perfect fit

Choosing your cloud computing solution isn’t so much about finding the “best” technology; it’s about finding the best fit for your specific business goals, compliance needs, and workload patterns.

 

Cloud type/model	Best for…	Not so good for…
Public cloud	Startups, projects with variable demand, rapid innovation, avoiding capital expenditure.	Requires active cost monitoring and governance to avoid budget overruns.
Private cloud	Regulated industries, sensitive data, predictable core workloads, control.	Demands upfront investment and expertise to manage – but deeserve can manage all of this, including buying all hardware to rent back at an affordable cost.
Hybrid cloud	Most established businesses that want a balance of control, cost, and scale.	Needs careful architecture and management to seamlessly connect two environments.

 

The journey to the cloud, whether public, private, or hybrid, should empower your business with the technology it needs to be agile, secure, and competitive.

deeserve are cloud experts who manage dedicated private cloud racks for countless clients around the world – helping you navigate your way into the cloud. We can fully manage your private cloud and other IT needs, reducing your internal team’s workloads and making sure you’re always on the best solution for your business.

And remember – if you don’t want to shoulder the initial investment costs of a private cloud setup, we’ll take that cost on, and provide the service to you in a simple monthly payment.

So – if you’re thinking about how your current IT infrastructure aligns with your business growth plans and would like a friendly, no-obligation conversation about where a private or hybrid cloud model might fit – we would love to hear from you. 

Our team is here to help you navigate these choices with confidence.

Call us on 01509 808586 or send your message to [email protected].

Posted on: 30th January 2026.