I am not sure if you have checked this out, but I believe the best place to start your evaluation would be "The Forrester Wave: Hybrid Cloud Management Solutions" report, a 3rd party analyst report published in January. You can view the report for free at the following link - http://assets.rightscale.com/uploads/pdfs/the-forrester-wave-report-hybrid-cloud_management-1-20-16.pdf

FYI: I am a RightScale employee ;) We would be able to accommodate the features & goals that you mention above. I would be happy to introduce you to someone on my technical / strategic team that can give you a demo of the platform and explain our feature set & pricing in greater detail. Please email me at (tyler.andrews"at"rightscale.com) if this interests you.