What is a cloud service?

Cloud service is one of those terms used everywhere and rarely explained. The core is simple: instead of buying and running your own servers, you rent computing power, storage, and software over the internet, and pay for what you use. Here’s what the term actually means, without the buzzwords.

Capacity out of the wall, not your own power plant

The best analogy is the power grid. A company doesn’t build its own power plant just to turn on the lights – it connects to the grid and pays for the kilowatt-hours it draws. Demand is free to swing over the day without anyone needing to build anything out.

The cloud works the same way for IT. You connect to a provider’s massive facilities and rent exactly the capacity you need for the moment. Ramping up for a campaign, you draw more; things calm down, you draw less. The alternative – owning the hardware yourself – is like the power plant: you have to size it for the highest conceivable peak and pay for it even on the days it sits unused.

That flexibility is the whole point. You avoid large upfront investments, avoid guessing how much capacity you’ll need in three years, and can scale up in minutes instead of weeks.

Three levels: infrastructure, platform, and finished service

Cloud services are usually split into three levels depending on how much the provider handles for you. The higher up, the less you have to manage yourself – but the less control you also have over the details.

Infrastructure is the lowest level: you rent raw building blocks like virtual servers, storage, and networking, and build everything on top yourself. It gives maximum freedom but requires the most in-house skill to run.

Platform is the middle level: the provider handles servers, operating systems, and operations, and you focus only on building and running your own application. You skip the server maintenance but follow the platform’s rules.

Finished service is the top level: a complete piece of software you just log into and use, like an email system or accounting software. Here the provider handles essentially everything, and you just adjust settings.

Most organizations use all three at once without thinking about it – a business system as a finished service, their own product run on a platform, and a bit of their own infrastructure for what doesn’t fit anywhere else.

A concrete example

Say you run an online store. Before the cloud, you’d have bought servers sized for the holiday rush – and paid for them in July too, when traffic is a fraction of that. If a server crashed on a Sunday, someone had to go in and replace it.

In the cloud, you instead start a few virtual servers that cover everyday traffic. As Black Friday approaches, you scale up capacity with a few clicks, and scale it back down once the rush is over. You pay for the high capacity only the days you actually need it, and the provider’s operations team keeps the hardware running for you. The difference from owning everything yourself becomes clear both in cost and in how fast you can react.

The market and the European alternatives

Three providers dominate: Amazon Web Services, Microsoft Azure, and Google Cloud. They offer hundreds of services at all three levels and run data centers worldwide. Alongside them are European alternatives, often chosen when data should stay within the EU for legal or strategic reasons.

Choosing a provider is rarely about who’s “best” in an absolute sense, but about what fits you: what technology you already use, what skills exist on the team, and what requirements you have for where data is stored. For organizations handling personal data, the data protection question weighs heavily, and then the cloud becomes as much a legal decision as a technical one.

If you want to work out which cloud strategy fits your organization and your regulatory requirements, at Weapp we’re glad to look at the whole picture and talk through the choices with you before you decide.