Public, private or hybrid cloud: how to choose
A practical comparison of the three cloud models — cost, control, compliance and flexibility — and the questions that point you to the right one.
Nebora Cloud engineering team
“Should we move to the cloud?” is rarely the right question anymore. The useful question is which kind of cloud fits each workload. Public, private and hybrid cloud each solve different problems, and most organizations end up using more than one.
Public cloud: flexibility first
In a public cloud, your virtual servers and storage run on shared infrastructure, separated from other customers by the platform. You create resources in minutes and pay for what you use.
Good fit for: websites and web applications, development and test environments, workloads with changing demand, new projects where requirements are not yet clear.
Watch out for: costs that grow quietly when nobody switches resources off, and data-location rules if your provider stores data outside the EU.
Private cloud: control and predictability
A private cloud is dedicated to one organization. The hardware is yours alone, while you still get the self-service and automation of a cloud platform.
Good fit for: ERP and core business systems, regulated data (finance, healthcare, public sector), workloads with steady, predictable usage, and software licensed per physical host.
Watch out for: you are sizing for capacity in advance, so plan growth with your provider.
Hybrid cloud: the best of both
Hybrid cloud connects on-premises systems, private cloud and public cloud into one network with shared security policies. Workloads run where they make the most sense — and can move later.
Good fit for: gradual migrations, keeping a legacy system on-site while new services run in the cloud, and using public cloud capacity for peaks or disaster recovery.
Watch out for: hybrid only works well with consistent networking, identity and monitoring across all environments. Without that, it becomes two separate worlds to manage.
Five questions that help you decide
- Where must the data live? If EU or national data residency is required, check where every copy — including backups — is stored.
- How predictable is the load? Steady loads are usually cheaper on private cloud; spiky loads suit public cloud.
- What do your licenses allow? Some enterprise software is far cheaper on dedicated hosts.
- Who will operate it? A managed service can close the gap if your team is small.
- How fast must you recover? Your RPO and RTO targets shape the architecture more than anything else.
A typical outcome
For many mid-sized companies we work with, the answer looks like this: core systems on a private cloud, web and test environments on public cloud, and backup and disaster recovery spanning both — all in one data center in Sofia, under one contract.
There is no single right model. There is a right model for each workload, and a plan for how they work together.