Hosting Comparison

Public vs. Private Cloud: What’s the Difference?

If you’ve been looking for a reliable cloud hosting solution to help host your website, you’re probably aware of the public vs. private cloud debate. Before making the final decision of siding with a certain end of the cloud computing, it’s important to have a comprehensive knowledge of public cloud and private cloud, as well as their differences.


What is Public Cloud?

The public cloud model is undoubtedly the most recognizable cloud computing model to users. Provided in a virtualized environment, cloud services under the public cloud model are constructed with utilization of pooled shared physical resources and are available to the internet and other public networks.

The public cloud model is widely used among online services, such as the cloud storage and online office applications offered by the SaaS providers. Meanwhile, cloud based web hosting and development environments offered by the IaaS and PaaS providers also fall into the public cloud model.

Features and Benefits of Public Clouds

  1. The public cloud is scalable. There is no restriction to the cloud resources that applications need during normal running thanks to the vast pools of resources along with the public clouds.
  2. The public cloud is cost effective. As a result of the ultimate scalability for cloud resources, public cloud services can get benefit from the largest possible economies of scale. Through centralizing operating and managing the server resources, and then sharing them across all of the subsequent cloud services, public clouds make it possible for a user to incredibly lower monthly rate.
  3. The public cloud is reliable. The nature of the cloud computing technology has assured that no cloud service will be affected even if one physical component fails to work, the public cloud services are no exception.
  4. The public cloud is flexible. All IaaS, SaaS, PaaS services, which combined together have made up the major market, can follow the public cloud model and can deliver benefits to private and enterprise users alike. In addition, the public cloud services are accessible no matter where a user is located as long as there is an internet connection.

Who Are Using the Public Cloud?

The most wide use of the public cloud model should be development systems or web servers that don’t have very high demand for security or compliance requirements.

What is Private Cloud?

A private cloud model provides a distinct cloud based environment that is highly secured, in which only those with permission can operate. Similar to the public cloud model, the private model takes advantage of physical computing resources inside an underlying pool to bring into a virtualized environment. The difference is, only the organization with permission can access to the cloud pool of resources under the private cloud model whilst bringing together greater control and privacy.

It’s hard to define if a service is making use of the private cloud computing just from the technical aspect. But it is possible to tell from whether a service features with a ring fencing of a cloud for the sole use of an organization plus with higher levels of network security.

Features and Benefits of the Private Cloud

  1. The private cloud is highly secured. By making use of techniques like a distinct pool of resources, the latest firewall system, and dedicated leased lines, and/or on-site internal hosting, the private cloud ensures high security and privacy for each operation.
  2. The private cloud offers clients more control over the network. The organization with the accessibility to a private is granted the ability to configure and manage the cloud environment on demand.
  3. The private cloud largely improves the service reliability. An exclusive cloud server or network means more resilience to individual failures across the physical infrastructure because resource can be pulled from the remaining unaffected servers more efficiently by virtual partitions.

Who Are Using the Private Cloud?

Just in the opposite to a public cloud, the private cloud is capable of delivering dedicated hardware but not through a utility model or pay-as-you-go basis. Therefore, the majority of private cloud deployments are utilized by mid to large-sized enterprises who have very strict needs for high security.

Public Cloud vs. Private Cloud

In the level of security and management required in cloud deployment, the public cloud model and the private cloud model hold a huge difference from each other, besides the cost and energy efficiency.



As is mentioned above, the public cloud allows multiple clients to have access to one pool of cloud resources; while the private cloud is dedicated to a single organization thus no other clients are accessible to the same data center. The result is, the private cloud is able to deliver higher security and privacy as required.


The public cloud model is especially preferred by those  requiring for the high volume, utility model, self-managed systems, which means that users can have the ability to setup or manage the details of their servers, and which also means that there is no possibility for them to enjoy a fully-managed solution.

On the other side, being accessed by only a single client, the private cloud makes it possible for the client to achieve a tailored network solution as needed by freely configuring and managing it inline. Additionally, in a private cloud, a dedicated server provider can integrate into any hardware for creating a high speed application.


To be honest, most public cloud services are more cost effective than the private cloud services. Just the same as the pricing between a shared hosting solution and a dedicated server, the private cloud enables more than one clients to pay for one pool of cloud resource, while the whole cost of a private cloud including the management fees requires a single client to plank out.

Energy Efficiency

As the private cloud clients are allowed to customize the cloud environment so as to make the resources available to individual departments and directly as well as flexibly respond to their needs. In this sense, the private cloud can make more efficient use of the computing resource than the public cloud.

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