企业门户网站指企业的信息及应用程序利用同一个平台在正确的时间，正确的地点，依用户权限提供正确的信息给正确用户。 企业门户网站（Enterprise Information Portal），是用以提供企业内部信息、交互的平台，通常包含企业常见的公告、内容发布、文档管理、协同作业等应用，并着重系统集成，通过单一签入的机制以访问企业其他系统。EIP通常能让用户自行开发、设置应用程序与内容。

依据Gartner机构的评估，领先的门户网站系统主要有IBM Websphere、Liferay Portal、Oracle WebCenter、Microsoft SharePoint、SAP。

An enterprise portal, also known as an enterprise information portal (EIP), is a framework for integrating information, people and processes across organizational boundaries in manner similar to the more general web portals. Enterprise portals provide a secure unified access point, often in the form of a web-based user interface, and are designed to aggregate and personalize information through application-specific portlets.