OpenStack is a free, open-source software platform for cloud computing. It provides users with an easy-to-use interface to create, manage, and deploy applications and services on public, private, or hybrid clouds. It is designed to enable organizations to build and manage cloud services and resources in a secure, reliable, and cost-effective manner. OpenStack consists of a set of interrelated components that control hardware pools of compute, storage, and networking resources throughout a datacenter. It works with popular enterprise and open source technologies such as KVM, Xen, VMware, and containers, as well as a variety of storage and networking technologies. OpenStack can be deployed on physical hardware or on top of virtualization technologies such as KVM and Xen. OpenStack is designed with a modular architecture that allows users to deploy different components and services as needed. Commonly deployed components include compute (Nova), identity service (Keystone), object storage (Swift), and image service (Glance). OpenStack also provides an API framework to allow users to develop and deploy custom applications and services. OpenStack is used by a variety of organizations, from small startups to global enterprises, to build and manage cloud-based applications and services. It is also used by governments and educational institutions to build and manage cloud-based services for their constituents. OpenStack is backed by a large and growing community of developers, users, and supporters.
CloudStack has fewer moving parts overall than other cloud control panels.