Integration as a Service (sometimes abbreviated as IaaS) is a cloud service delivery model for integration. Integration-as-a-Service delivers an integration solution that provides connectivity to backend systems, sources, files, and operational applications through the implementation of well-defined interfaces, web services, and calls between applications and data sources. This provides users with a more loosely coupled environment, safe from complex interdependence. The Integration-as-a-Service delivery model enables integration across the cloud, making it possible to share data between systems as well as third party vendors in real-time.