Apache CloudStack

Apache CloudStack is a mature open-source IaaS platform developed by The Apache Software Foundation. It is designed to deploy and manage large-scale virtualized environments across distributed data centers. The platform supports multi-hypervisor environments including VMware, KVM, XenServer, and bare metal, making it highly flexible for enterprises, MSPs, telcos, and cloud service providers. CloudStack delivers a turnkey cloud stack that includes compute orchestration, Network-as-a-Service, storage management, user and account management, resource metering, and a full-featured web UI. Its compatibility with AWS EC2 and S3 APIs makes hybrid cloud deployments easier for organizations seeking interoperability. The platform is known for scalability, capable of managing tens of thousands of physical servers, while remaining relatively simple to deploy and operate with small teams. Backed by a strong open-source community, CloudStack eliminates vendor lock-in and gives organizations full control over infrastructure decisions. It is particularly well-suited for companies building public or private IaaS clouds that require high availability, automation, and multi-tenant management capabilities.