Public and private clouds are similar in nature; however, their differences are what makes each tailored to perform completely different tasks. Public clouds are based on the sharing of physical hardware from the use of a third-party provider. Public clouds are ideal for organizations like Amazon Web and Google Cloud, where the infrastructure needs to be shared with many users. They can also be cost-effective and offer high scalability via reduced hardware demands.
Private clouds are individual clouds, designed for a specific business. These are very secure and offer an immense amount of customization options. By using cloud bursting during a data spike, resource use can be switched to a public cloud, thus saving on overages. Although, private clouds are typically costly due to the many advantages it has over public clouds.
A hybrid cloud is also an option. It is operated by using private and public clouds with both internal and external providers. This option is a great choice since it offers the many benefits of public and private clouds, combined.
Earls, Alan. (2017). Public Cloud. Retrieved from http://searchcloudcomputing.techtarget.com/definition/public-cloud.