Cloud vs colocation: key questions for IT and infrastructure decisions

Cloud computing and colocation are two common approaches for running business infrastructure in external data centre environments. Cloud services typically run from large-scale cloud data centres, while colocation allows organisations to place their own hardware inside professionally operated facilities. Each model offers different levels of control, flexibility and operational responsibility.  

Q: What is the difference between cloud computing and colocation?

A: Cloud computing delivers infrastructure as a service (IaaS) from a cloud data centre environment, where the provider operates the hardware and platform while organisations deploy and manage workloads on virtualised resources. Colocation takes a different approach. Businesses own their physical servers but place them in a third-party data centre that supplies power, cooling, security and network connectivity. The main difference is ownership and operational responsibility: cloud infrastructure is service-delivered, while colocation keeps infrastructure under the customer’s control.

Q: What is a cloud data centre?

A: A cloud data centre is a physical facility that hosts the infrastructure used to deliver cloud services. Servers, storage systems and networking equipment are installed in secure environments with resilient power, cooling and connectivity. Cloud platforms then use virtualisation and management software to deliver those resources to organisations as scalable services.

Q: How do data centres support cloud computing?

A: Data centres provide the physical environment where cloud infrastructure operates. They supply the core requirements for running large-scale computing platforms, including power distribution, cooling systems, network connectivity and physical security. Cloud computing builds on top of these facilities by delivering virtualised infrastructure that organisations can provision and manage without owning the underlying hardware.

Q: When should a business choose cloud computing instead of colocation?

A: Cloud computing is often chosen when organisations need flexibility and the ability to scale infrastructure fast. Because capacity is delivered as a service, teams can increase or reduce resources based on workload demand without purchasing hardware. This approach is often suitable for development environments, applications with variable usage patterns, or organisations that prefer not to manage physical infrastructure.

Q: When is colocation a better option than cloud?

A: Colocation can be the better choice when organisations require direct control over their hardware or need to run specific configurations that may not be supported in shared cloud platforms. It is also commonly used where businesses already own infrastructure or need predictable performance characteristics from dedicated servers.

Q: Can organisations combine cloud and colocation?

A: Yes. Many organisations run workloads across both models. For example, critical or legacy systems may remain on dedicated hardware in colocation, while newer applications run in cloud environments for flexibility and scalability. This combined approach is often used in hybrid infrastructure strategies where connectivity between environments is carefully managed.

Q: Which is more secure: cloud or colocation?

A: Both approaches can support strong security when implemented correctly, but responsibility is handled differently. In cloud environments, the provider secures the underlying infrastructure and platform, while customers manage application security, identities and configuration. With colocation, organisations retain full responsibility for their hardware and software but benefit from the physical security and resilience provided by the data centre facility.

Q: How do costs compare between cloud and colocation?

A: Cloud services typically follow a consumption model where organisations pay for the resources they use. This reduces upfront investment but costs can vary depending on workload demand. Colocation involves purchasing and maintaining hardware while paying for rack space, power, cooling and connectivity within the facility. For organisations that already own infrastructure, colocation may offer more predictable long-term costs.

Q: How does scalability differ between cloud and colocation?

A: Cloud environments allow organisations to scale infrastructure quickly by provisioning additional resources through service portals or management tools. In colocation environments, scaling usually requires purchasing additional hardware and expanding rack capacity within the data centre. While both models support growth, cloud typically enables faster scaling when demand changes.

Q: What should businesses consider when choosing between cloud and colocation?

A: Organisations usually evaluate how much control they need over infrastructure, how predictable their workloads are, how quickly they need to scale capacity, and what security or compliance requirements apply. Budget structure, internal operational expertise and long-term technology strategy also influence whether cloud computing, colocation or a combination of both will be the most suitable approach.

Learn more about cloud vs colocation

If you are evaluating where to run your workloads, understanding the differences between cloud computing and colocation can help clarify the right approach for your infrastructure strategy. Read our full guide here