@Brian Hi!
The partners listed are not direct partners with us, they are partners of our partners. Network traffic of our services is flowing through interconnections made by some companies we partner with in order to improve performance while not having to maintain expensive hardware in that early stage.
Technically yes, at the current stage it is a fully software startup. When you create a MediaEdge pull zone many services are getting aligned, in order to achieve the level of performance, security and reliability we currently provide and at the final network that your content is getting upstreamed (or served directly from cache) we have custom code running allowing us to control many things and add custom features that make our CDN truly next-gen.