What is the difference between public, private, and hybrid cloud?

These three models describe different ways of structuring cloud infrastructure, and the right choice depends on your specific security, compliance and cost requirements, not a one-size-fits-all answer.

Public Cloud

Infrastructure shared across many different customers on the same underlying physical hardware, though each customer's data and workloads are logically isolated and secured from others. Providers like Azure, AWS, and Huawei Cloud operate at this massive shared scale. This is the most cost-effective model, since infrastructure costs are spread across many customers, and it offers the most flexibility to scale up or down quickly.

Private Cloud

Infrastructure dedicated entirely to a single organisation, either hosted on-premises or by a provider but not shared with other customers. This offers more control and can suit specific compliance or performance requirements where dedicated infrastructure is genuinely necessary, but at meaningfully higher cost than shared public cloud, since you're not benefiting from the economies of scale shared infrastructure provides.

Hybrid Cloud

A combination, some workloads running in public cloud, others in private cloud or remaining on-premises, connected together into one coherent environment. This is increasingly the practical reality for many businesses: sensitive or regulated workloads might sit in a more controlled private environment, while general applications and storage run in cost-effective public cloud.

Which Model Actually Fits Most SMEs

For the large majority of small and medium businesses, public cloud (properly configured and secured) is both the most cost-effective and entirely adequate choice, the "shared infrastructure" concern is often overstated, reputable public cloud providers implement serious isolation and security between customers as a core part of their business. Private cloud tends to make sense for specific regulatory requirements, particular data residency mandates, or genuinely unusual performance needs, not as a default assumption that shared infrastructure is inherently less secure.

Data Residency Considerations

Regardless of which model you choose, one question matters more for South African businesses than the public/private distinction alone: where physically is the data stored? Major providers increasingly offer in-country or regional data centre options (Huawei Cloud's Johannesburg region, for instance), which matters directly for POPIA data-residency considerations and for public-sector or regulated-industry procurement requirements.

Cost Comparison in Practice

Public cloud generally wins clearly on cost for standard business workloads, email, file storage, standard business applications. Private cloud's cost premium is usually only justified when there's a specific, genuine driver, a regulatory requirement mandating dedicated infrastructure, or a workload with performance characteristics that specifically benefit from dedicated, non-shared resources.

Our Approach

We help assess which model, or which hybrid mix, actually matches your regulatory obligations, budget, and workload requirements, rather than defaulting to whichever model happens to be easiest to sell, and we're specifically attentive to South African data residency requirements when recommending a provider and region.