Predix POCs were on AWS but have migrated primarily to internal datacenters after customers expressed little interest in running applications using Predix on AWS. Not sure if this is poor foresight by the Predix team or an unexpected change in customer sentiment.

I'd be surprised if anyone outside Silicon Valley in GE's LOBs wanted to consider AWS for production considering how many have likely invested greatly into their own datacenters as well as the general trends of non-technology companies to fear an external cloud first instinctively regardless of how poorly managed their internal IT is. This puts GE in a poor position potentially in that even if they create a great platform that their customers that are perhaps even more technology phobic will need to invest money as well into areas they historically have failed to generate much ROI from. But perhaps GE's dominance / position can help them here and these concerns are long addressed.

I can't speak for where Predix is hosted.

PWS is on AWS. But Cloud Foundry itself can be mounted on AWS, OpenStack, Azure, GPC is coming and others I've forgotten.

There are two.. AWS and hosted in virgina.. AWS is FAR better then hosted.. the hosted predix is 90% of the issues