Microsoft Azure, commonly called Azure, is Microsoft's cloud-computing platform for building, deploying and managing applications, infrastructure, data systems, AI workloads and other technology services. Microsoft describes Azure as a comprehensive cloud platform offering infrastructure, data, analytics and AI capabilities, and as a platform for building, running and managing applications across cloud, hybrid and edge environments. Azure is not itself a single data centre: its services are delivered through Microsoft's global network of data-centre infrastructure. Microsoft states that Azure launched in 2010 and has subsequently expanded into a broad platform containing more than 200 products and services. Its services span virtual machines, storage, networking, databases, containers, application platforms, security, analytics, AI and many other areas.
Azure provides infrastructure services that correspond broadly to IaaS concepts. Azure Virtual Machines allow customers to provision configurable compute instances, while Azure Virtual Network provides software-defined networking and Azure Storage provides multiple storage models. Customers can configure operating systems, networks, disks, access controls and other infrastructure components. Higher-level services provide progressively more abstraction, including managed databases, application platforms, containers and serverless functions. This makes Azure suitable for organisations that want either substantial infrastructure control or highly managed development environments. The distinction between IaaS, PaaS and SaaS applies to Azure services individually rather than to Azure as a whole: Azure is a platform containing services operating at different abstraction levels.
Azure has a strong emphasis on hybrid and enterprise computing. Microsoft positions Azure as an adaptive cloud capable of extending across data centres, multicloud environments and edge locations. Technologies such as Azure Arc can help organisations manage resources outside Azure through Azure management mechanisms, while Azure Stack-related technologies extend selected Azure capabilities into customer-controlled environments. This is significant for organisations that cannot move all workloads into a public cloud because of regulatory, latency, technical, legacy or operational requirements. Hybrid architectures can connect on-premises systems with Azure services through networking, identity integration, data replication and application interfaces. Azure therefore supports cloud adoption without requiring every workload to be physically located in Microsoft's public cloud.
Microsoft Azure provides extensive data and application services. Azure SQL-related services provide managed relational database capabilities, while Cosmos DB provides a distributed database platform. Azure App Service offers managed application hosting, Azure Functions provides serverless execution and Azure Kubernetes Service supports managed Kubernetes environments. Azure also provides data engineering, analytics and AI services, including machine-learning capabilities and services integrated with Microsoft's broader technology ecosystem. The exact service architecture determines how much infrastructure the customer manages. A virtual machine provides comparatively direct operating-system control, whereas a managed application service delegates more operational work to Microsoft. This range allows different teams to choose the appropriate abstraction level for a workload.
Azure security combines Microsoft-managed infrastructure controls with customer-configurable security capabilities. Microsoft describes Azure as providing multilayered security across physical data centres, infrastructure and operations, together with resiliency, disaster recovery and backup capabilities. Customers can use identity and access controls, network security, encryption, security monitoring, policy enforcement and Microsoft security services to protect workloads. Azure's security architecture also incorporates governance and compliance capabilities intended for regulated organisations.
As with other public clouds, Microsoft secures portions of the underlying infrastructure while customers remain responsible for securing their identities, applications, data and configurations according to the service model. A secure Azure deployment therefore requires appropriate configuration rather than assuming that the provider's infrastructure security automatically protects every customer workload.
Azure supports a broad range of operating systems, programming languages, frameworks and development tools. Developers can work with .NET and Microsoft's development ecosystem but can also deploy Linux workloads and applications built with languages and frameworks such as Java, Python, JavaScript and others. Azure's tooling includes command-line interfaces, management APIs, infrastructure-as-code technologies, CI/CD integration and developer services. Integration with GitHub and Microsoft's development platforms can support automated build and deployment workflows. This broad language and platform support is important because Azure is not limited to applications written using Microsoft technologies. It is a general cloud platform that accommodates heterogeneous enterprise and open-source workloads alongside Microsoft's own ecosystem.
Azure has a large global infrastructure and organises services geographically into regions and other fault domains. Customers can choose locations according to latency, compliance, data-residency and resilience requirements. Microsoft states that Azure provides a global network of data centres and currently describes its footprint as spanning more than 70 regions. Region selection can affect service availability and pricing, while multi-region architectures can improve geographic resilience at the cost of additional complexity.
Azure also supports availability and disaster-recovery technologies designed to reduce the impact of infrastructure failures. As with any cloud provider, these features do not automatically make an application resilient: the application must be architected to use redundancy appropriately and its data must be protected through suitable replication or backup strategies.
Azure is particularly significant in enterprise IT because it integrates cloud services with Microsoft's longstanding ecosystem of operating systems, identity, productivity software, developer tools and enterprise management technologies. Organisations can integrate Azure with Microsoft Entra ID for identity, Microsoft security products for threat management, Microsoft data platforms and other enterprise systems. Azure also supports AI and modern application development, while its hybrid capabilities allow organisations to combine on-premises and cloud resources.
Microsoft's description of Azure emphasises infrastructure, data, analytics, AI and hybrid or edge deployment. Azure should therefore be understood not as one type of cloud service but as a broad cloud platform whose individual services cover IaaS, PaaS, serverless, data, AI, security and application-management functions. Its central purpose is to provide programmable, scalable computing capabilities through Microsoft's global cloud infrastructure while supporting cloud-native, hybrid and distributed technology architectures.
