Before comparing private and public cloud, list what the application needs: capacity, data location, recovery targets, external services, and someone to operate it. The hosting model is one part of that decision.
In NIST's definition, private cloud is reserved for one organisation. It can be operated by that organisation or a third party, on or off premises. Public cloud offers services to a broader customer base. The terms describe a deployment model; they do not specify the full support agreement.
Ask what is dedicated
A provider may dedicate the compute hosts while sharing network equipment, a management system, or parts of the storage service. Get a description of the arrangement rather than assuming every component is exclusive.
Be equally precise about control. Your team might manage the hypervisor, or the provider might retain that responsibility. A dedicated environment does not necessarily give you physical access to the hardware or permission to change every setting.
For sensitive workloads, document the actual boundaries and administrator access. Then review them against your requirements. Our data-sovereignty guide provides a way to trace those details.
Decide which work you want to own
Running an application involves more than provisioning a VM. Someone must patch it, monitor it, back it up, restore it, rotate credentials, and keep its dependencies supported.
A public-cloud database service may take over work that a VM-based database leaves to your team. A managed private-cloud contract may include that work too. Compare the specific services and responsibilities in the proposals.
For each option, write down who responds to a failed backup or a full database disk. If the answer is your team, include that work in the staffing plan and cost comparison.
Compare the capacity you will really use
Dedicated capacity can make sense for a stable group of applications. You pay for the available resources, including headroom and spare capacity needed during failures. The cost per workload depends on how much of that capacity is useful to you.
Public-cloud resources can be provisioned for a shorter period, subject to availability and service limits. This can help with temporary environments or uneven demand. Persistent storage, traffic, licences, and unused commitments still need to be accounted for when compute is stopped.
Use the same recovery requirements and retention periods in both quotes. A cheaper proposal that omits a second copy of the data is a different service. For a more detailed comparison, see where to look in a growing cloud bill.
Include the exit work
Check how you would move the application, its data, permissions, and supporting services. Open formats can help, but you still need a tested export and somewhere to restore it. Proprietary dependencies can exist in a private cloud too.
A hybrid setup is worth considering when individual workloads have different needs. It also adds network paths, identities, monitoring, and failure cases to maintain. Make those connections part of the design and support agreement.
At Anchras, the control plane runs in the EU while customers choose where supported workloads run. The platform overview describes the supported environments. Start the placement decision with one application and compare the two operating plans around it.