O que é um modelo de implantação de nuvem pública?

Public cloud, also known as external cloud, is a form of cloud computing that involves a third party providing end customers with access to the computing resources they require, such as servers, applications, and storage space, through the Internet. The provider runs them from its own data centers; the AWS Cloud, for example, spans 39 geographic regions as of October 2026. Public cloud services are usually billed on a ‘pay-as-you-go’ basis.

Os principais modelos de implantação em nuvem são a nuvem pública, nuvem privada e nuvem híbrida. Cada modelo é voltado para as necessidades e demandas de um determinado grupo de usuários. A nuvem pública oferece recursos compartilhados para eficiência de custos, a nuvem privada fornece recursos dedicados para controle aprimorado e a nuvem híbrida combina ambos para flexibilidade. O modelo ideal para sua organização depende de requisitos específicos como segurança, orçamento e nível desejado de controle.

Public cloud differs from on-premises infrastructure by ownership, payment structure, flexibility, assistance, and openness. Above all, while public cloud resources are owned and run by the third-party CSP, on-premise resources are owned and run by the actual company. This results in variations in costs, scalability, and responsibilities.

In this multi-tenancy model, each customer’s data and applications remain isolated (Microsoft Azure). However, in public cloud environments, data is stored across multiple servers in data centers owned and managed by cloud service providers (CSPs), where users lack direct control over these servers and ter less control over the underlying infrastructure compared to on-premises solutions.

When considering modelos de implantação em nuvem, the public cloud is applicable for scenarios involving fluctuating demand, such as websites with variable traffic, development and testing setups, and offsite data storage.

Some of the leading public cloud solutions include AWS, Azure, and GCP. The AWS Cloud spans 39 geographic regions as of October 2026 (AWS). Public cloud services fall into three models:

• Infraestrutura como serviço (IaaS): Virtual machines, storage, as well as networking.
• Plataforma como serviço (PaaS): Soluções baseadas em nuvem para desenvolvimento e implantação de aplicativos.
• Software como serviço (SaaS): Applications stored em the cloud (such as Salesforce, Dropbox, and others).

Visit AWS, Azure, and GCP websites to look for more information on the options tailored to your organization’s needs.