Abstract
We introduce here a cloud service broker that implements a multi-cloud abstraction API with the aim to use it for performance comparisons between different services. Our broker is a multi-cloud storage API that supports a number of provided storage services. The API library offers three services, namely File service, Blob service and Table service. While a broker normally addresses interoperability concerns, based on this architecture, a performance test application was developed here to compare between the different providers. This test configuration was used to compare a range storage operations of different services.