Top 5 Cloud Computing , Engine Yard , 4/5
In August 2011, Engine Yard acquired Orchestra.io to add PHP expertise to the Engine Yard team and platform. In September 2011, the company launched a partner program that includes over 40 cloud technology companies. These partners provide add-on services—application performance management, email deliverability, load testing and more—within the Engine Yard Platform.
In early 2012, Engine Yard reported that its revenue doubled year over year to $28 million in 2011, and the number of paying customers rose 50 percent to 2,000 in that time.Engine Yard claims that with its $28 million in revenue for 2011 it is the leading open platform as a service.
In June 2013, Engine Yard formed a strategic alliance with Microsoft  and went live on Windows Azure marketplace on July 31, 2013. Developers can use this open source Platform-as-a-Service running on Microsoft cloud infrastructure to deploy web and mobile apps.
Engine Yard sponsors a number of open-source projects…
In October 2009, Engine Yard received an additional $19 million in funding from a combination of Benchmark Capital, New Enterprise Associates, Amazon, Bay Partners, Presidio Ventures and DAG Ventures, for a total of $37.5 million in funding.
In November 2012, Oracle Corporation announced that it made a strategic minority investment in Engine Yard. Financial details of the investment were not disclosed. Engine Yard continues to operate as an independent company.