The ability to establish partnerships and execute them with a long term win-win strategy is not an easy aspect of the business. Pivotal has a clear road-map for partnerships and reach the final customer thanks to their partners.
EMC & Pivotal: starting on specific deals: GE Joins EMC and VMware in a Joint Venture to Challenge Software Megavendors in the Cloud
IBM Blue-Mix and Pivotal Labs http://www.datacenterknowledge.com/archives/2014/04/28/ibm-launches-cloud-marketplace/
Cloud Foundry compared with other PaaSes
Dell offers their Applications Services on Cloud Foundry Dell Expands Digital Services Portfolio to Include End–To-End Application Services on Pivotal Cloud Foundry