Microsoft Azure 是微软的公用云端服务 (Public Cloud Service) 平台，是微软在线服务 (Microsoft Online Services) 的一部份，自 2008 年开始发展，2010年2月份正式推出，目前全球有22座数据中心以及32个CDN跳跃点 (POP)，并且于2015年时被 Gartner 列为云端运算的领先者。

目前 Microsoft Azure 已包含 30 余种服务，数百项功能，并且为微软带来了12亿美元的获利 (2015年度) 。

Microsoft Azure /ˈæʒər/ is a cloud computing platform and infrastructure created by Microsoft for building, deploying, and managing applications and services through a global network of Microsoft-managed data centers.

It provides both PaaS and IaaS services and supports many different programming languages, tools and frameworks, including both Microsoft-specific and third-party software and systems.