Ahh... my favorite subject! Can't resist :) SaaS companies are leaving a lot of money on the table by insisting to "making the world a better place" from their US-East AWS region ;-) The world, especially the enterprisey world of lucrative contracts, is much larger than that.

Gravitational [1] specializes in taking complex multi-server SaaS stacks into private cloud environments and providing ongoing management for them.

[1] http://gravitational.com Full disclaimer: I work there.