Me ha parecido fantástica esta documentación de Esri, de título: “Understand the relationship between ArcGIS Enterprise and ArcGIS Online“. Para los usuarios ArcGIS no siempre están claras las diferencias entre ambos, sobre todo porque la interfaz de ArcGIS Online y de ArcGIS Enterprise Portal son muy similares. Veamos, pues, qué indica la documentación:
ArcGIS Online is a highly scalable software-as-a-service (SaaS) offering from Esri. It is hosted on Esri servers and completely scaled, managed, updated, and maintained by Esri. Because Esri controls the update schedule, you are not responsible for upgrading or patching the system themselves. What is current in ArcGIS Online is always current for any user around the world. As your usage and data needs scale, ArcGIS Online dynamically scales with you without the need for you to provision additional servers or infrastructure, though additional data stores are available to you if required. With ArcGIS Online, all you need is an organizational subscription and you are ready to go.
ArcGIS Enterprise is software that is installed on infrastructure you control and manage, whether in the cloud, on-premises, or on virtual machines. This allows you to design a highly customized system that meets your organization’s business needs and service level agreements. You can choose to deploy all base ArcGIS Enterprise components on one machine or scale out to many machines. High availability and disaster recovery strategies are supported, as well as deployments that are completely disconnected from the internet. With ArcGIS Enterprise, you have complete control over your system, whether that is when to patch the system or when to upgrade to the next version of the software.
ArcGIS Enterprise typically has one to two releases per year, whereas ArcGIS Online typically updates four times a year. Though ArcGIS Enterprise does not include all features and functionality that ArcGIS Online has and vice versa, you can typically expect to see most ArcGIS Online features within the ArcGIS Enterprise portal in the next few ArcGIS Enterprise releases following an ArcGIS Online update.
Documentación Esri.
Update 2023: Teniendo en cuenta que este post lo escribí a inicios de 2022, he visto que Esri ha publicado recientemente un artículo sobre el tema, lo añado a continuación:
The Differences Between ArcGIS Online and ArcGIS Enterprise [ArcGIS Blog; Summer 2023]
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