NTT Group chose Cloud Foundry as the platform for their public cloud PaaS offering called Cloudn. Some key reasons included Cloud Foundry's portability across environments, extensibility which allowed them to integrate other Cloudn services, and scalability which was important for their public services. Over two years they developed several extensions for Cloudn PaaS like a user-friendly web interface, persistent application logging, and integration with Cloudn's authentication and billing systems. They were able to launch Cloudn PaaS rapidly thanks to Cloud Foundry meeting their requirements.