vRealize Orchestrator is a platform that provides a library of extensible workflows to allow you to create and run automated, configurable processes to manage the vSphere infrastructure and other VMware and third-party technologies.
vRealize Orchestrator is composed of three distinct layers: an orchestration platform that provides the common features required for an orchestration tool, a plug-in architecture to integrate control of subsystems, and a library of workflows. vRealize Orchestrator is an open platform that can be extended with new plug-ins and libraries and can be integrated into larger architectures through a REST API.