Signing up for a simple web hosting package will usually buy you a defined block of resources on a single server: this much web space, that much bandwidth, maybe a set amount of RAM or CPU cores.

While this works well for many websites, having fixed resources can be a problem for larger projects. There's generally no way to temporarily allocate extra RAM or bandwidth if you experience an increase in traffic, and even a simple plan upgrade might require your website to go offline for a while.

Cloud hosting plans look much like virtual private server (VPS) products, where you'll initially pay for a set amount of web space, RAM, CPU time and bandwidth. But these resources are spread across multiple devices instead of just one, and changing your plan later – adding another gig of RAM, for instance – is generally as easy as dragging a slider, with the extra power coming online within moments.

This flexibility is great for delivering extra power when you need it most, and starting prices can be similar to regular VPS hosting (from £10 or $14 a month). Costs will rise as you add resources, but typically you'll only pay for the time in which you use these resources.

DigitalOcean's monster 192GB RAM, 32 vCPU and 3,840GB SSD product costs $960 (£685) a month, for instance, but this pay-as-you-go approach allows you to try it out for $1.429 or £1.02 an hour.

Cloud hosting still won't be for everyone, and small, simple websites are likely to be better off with regular packages. But the technology has a lot to offer anyone with larger or more ambitious projects, and many hosts run free trials which make it easy to explore their abilities for yourself.

1. HostGator

A great option for smaller operations

Cloud hosting isn't just for big business. HostGator's cloud platform spreads your website load across multiple virtual server instances for more reliable and scalable hosting, but it's as easy to use as standard shared hosting, and only costs a little more.

For example, the baseline Hatchling Cloud plan gets you support for one domain, unmetered bandwidth and storage, a share of up to two cores and 2GB RAM, and distributed Varnish caching to speed up the loading of static content. You can get started for as little as $4.95 (£3.50) a month if you buy three years upfront, although the price leaps to $8.95 (£6.40) on renewal.

If you need something more powerful, the top-of-the-range Business Cloud plan supports unlimited domains, gives you up to six cores and 6GB RAM, and includes private SSL and a dedicated IP. Another chunky introductory discount means you can pay as little as $9.95 (£7.10) a month over three years, but after that you'll pay $17.95 (£12.80) per month.

Benefits of the cloud plans include (up to) twice as fast load times, along with more site statistics, and because your site is mirrored across multiple devices, the ability to switch your site to another server in the event of a hardware failure.

But the key advantage of all cloud hosting schemes is scalability. If your site can't cope with demand, you can scale up to eight cores and 8GB RAM with a click. There's no waiting around for someone to process your order and no downtime while your web space is reallocated – you get the extra resources right away.

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