5G commercialization relies on validating the vertical use cases and selecting the ones creating values for both mobile operators and vertical stakeholders. To trans[1]fer the validations to commercialization more quickly, it is important to build a 5G platform not only with a similar scale and reliability as a commercial 5G but also capable of offering advanced beyond 5G services. In this paper, we propose an Experiment-as-a-Service (EaaS) framework which systematically offers four types of testing services, integration,

functional, performance, and security testing. Then the iCORA (innovative, cloud-native, open, robust and automated) plat[1]form is presented to demonstrate how the EaaS framework could be realized in a large-scale 5G experimentation platform, which offers both diversity and flexibility for testing and experiments. A media use case is used to exemplify how the EaaS tailors the iCORA network to support various demands of vertical use cases and meet their KPIs.