Cloud Foundry is an open platform as a service, providing a choice of clouds, developer frameworks, and application services. Cloud Foundry makes it faster and easier to build, test, deploy, and scale applications. It is an open source project and is available through a variety of private cloud distributions and public cloud instances.
Cloud Foundry takes an open approach to Platform as a Service. Most PaaS offerings restrict developer choices of frameworks, application services, and deployment clouds. The open and extensible nature of Cloud Foundry means developers will not be locked into a single framework, single set of application services, or a single cloud.