Private cloud is dedicated infrastructure built for one organization. Public cloud is shared, provider-owned infrastructure delivered over the internet to anyone who signs up for it. The difference between private cloud and public cloud comes down to who controls the environment, who owns the tenancy, and how you pay for it. Once you understand those three variables, the rest of the decision is all about matching workloads to the right model.
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What Is a Private Cloud?
According to NIST, a private cloud is infrastructure provisioned for exclusive use by a single organization. Private cloud isn’t defined by where the servers sit. It can run in a company’s own data center, in a colocation facility, or through a managed private cloud provider. What makes it private is exclusivity. The infrastructure serves one organization, not the general public, regardless of who owns the physical hardware.
Because those resources are dedicated, IT teams get more room to customize. Security controls, network architecture, and data placement can all be built around specific requirements instead of shared defaults. That’s a meaningful advantage for organizations with strict compliance obligations or workloads that can’t tolerate shared-tenant variability. -
What Is a Public Cloud?
Public cloud is infrastructure made available for general use, owned and operated by a provider on that provider’s own premises. Examples include AWS, Microsoft Azure, and Google Cloud. These providers build massive shared infrastructure and rent pieces of it out through subscription or pay-as-you-go pricing.
The provider handles the underlying infrastructure, like the physical servers, networking, and facility management. The customer controls what runs on top of it, meaning workloads, identities, data, and configuration. -
Private Cloud vs. Public Cloud: Key Differences
Area Private Cloud Public Cloud Control Greater control over architecture, configuration, data placement, and security policy Provider manages infrastructure; customer controls workloads, identities, data, and configuration Cost model Higher upfront or contracted cost, more predictable for stable workloads Lower upfront cost and fast provisioning, but spend can rise with scale and usage Security Dedicated environment with more customization and visibility Strong provider tooling, but security is shared between provider and customer Scalability Scales within dedicated capacity, expansion needs planning Rapid global scalability, strong fit for bursty or unpredictable demand Compliance Strong fit for data residency, auditability, and custom governance needs Can support compliance, but customers must configure services correctly Use cases Regulated workloads, sensitive data, legacy systems, predictable high-utilization apps Web apps, dev/test, analytics, AI services, backup, and variable workloads Public cloud wins on fast elasticity and low entry cost. Private cloud wins on predictable performance, isolation, and governance. Neither one is universally cheaper or universally safer.
On cost specifically, resist the urge to call public cloud the cheap option. Flexera’s 2026 report found an estimated 29% of cloud spend goes to waste, and 68% of organizations rank cost optimization as their top cloud initiative. Public cloud is easy to start and hard to keep tight without active management.
Security follows a similar pattern. According to NSA and CISA’s shared-responsibility guidance, private cloud is not automatically secure, and public cloud is only secure when it’s configured correctly. Control gives you options, and not a free pass on doing the work. -
When Does Each Cloud Model Make Sense?
Private Cloud Fit
Private cloud tends to make sense for regulated industries, sensitive data, latency-sensitive applications, legacy systems that weren’t built for the cloud, and workloads with predictable, high utilization. Demand for this kind of control is growing, not shrinking. Gartner forecasts that sovereign cloud IaaS spending will hit $80 billion in 2026, up 35.6% year over year, largely driven by data residency and national security requirements.
Public Cloud Fit
Public cloud shines for dev/test environments, analytics, AI services, customer-facing applications, collaboration tools, backup, and anything with bursty or unpredictable demand. The growth numbers back that up. IDC projects global public cloud spending will pass $1 trillion in 2026, growing more than 21% year over year.
Hybrid As the Real Answer
Most organizations aren’t choosing one side. Flexera’s 2026 data found that 73% of organizations run hybrid cloud estates, meaning they’re placing workloads based on what each one needs rather than defaulting to a single environment.
There’s also a repatriation trend worth noting: Broadcom’s 2025 Private Cloud Outlook found 69% of respondents considering moving workloads back from public to private cloud, with 35% already having done so, mostly for security and compliance reasons. -
How Disaster Recovery as a Service Pricing Differs Across Cloud Models
DRaaS pricing is rarely a flat bill, regardless of which cloud model backs it. Costs shift based on protected servers or VMs, storage volume, retention periods, replication frequency, network transfer, test failover, failover compute, RTO/RPO targets, and the level of managed support included.
Below are a few benchmarks to help put real numbers behind that:- AWS Elastic Disaster Recovery charges $0.028 per source server per hour, which works out to roughly $2,044 per month for 100 servers before staging disks, snapshots, recovery instances, and data transfer are added in.
- Azure Site Recovery prices per protected instance, with the first 31 days free, plus separate charges for storage, transactions, egress, snapshots, and failover compute.
- Google Cloud Backup and DR runs on a consumption-based model, with a VMware Engine example landing around $331 per month for a single node.
The pattern across all three: The sticker price is just the entry point. Disaster recovery as a service pricing only tells the full story once you factor in testing, orchestration, and actual recovery performance.
Veeam’s 2026 report found that 90% of organizations felt confident they could meet their recovery time objectives, but only 28% fully recovered their data after a ransomware incident. The cheapest line item and the safest plan are not the same thing. Confirm that pricing includes testing, ransomware recovery workflows, failback, and compliance documentation before signing anything. -
FAQs About Private and Public Clouds
What is the main difference between private cloud and public cloud?
Private cloud uses dedicated infrastructure for one organization. Public cloud uses provider-managed infrastructure shared across many customers. The core distinction is control, customization, and isolation.
Is private cloud more secure than public cloud?
Private cloud offers more control over security design and data location, but it isn’t automatically more secure. Public cloud can be just as secure when configured and monitored correctly, since responsibility is shared between provider and customer.
Is public cloud cheaper than private cloud?
Often cheaper to start, since it avoids large upfront investment. However, usage, storage, and data transfer costs can climb over time. Private cloud can be more economical for stable, long-term workloads.
Can a private cloud be hosted by a provider?
A private cloud doesn’t need to live in a company-owned data center. It can be hosted and managed by a third party as long as the infrastructure stays dedicated to one organization.
What affects disaster recovery as a service pricing?
Protected servers, storage volume, replication frequency, retention, testing cadence, failover compute, RTO/RPO requirements, and the level of managed support all factor in.
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Map Your Workloads to the Right Cloud Model with OTAVA
The difference between private cloud and public cloud is a decision you revisit workload by workload, and the right placement usually isn’t all-or-nothing.
OTAVA builds its platform around that reality. We offer dedicated and virtual private cloud on VMware Cloud Foundation, managed public cloud, and the flexibility to place workloads across hybrid environments based on what each one requires. We also include integrated DRaaS, no ingress or egress fees, and compliance-ready environments for organizations that can’t afford to guess on governance.
If you’re not sure where a given workload belongs, talk to an OTAVA expert. We’ll help you figure out what should stay dedicated, what can move to public cloud, and what belongs somewhere in between.
