How does PubNub Compare with AJAX Push Engine (APE)?

AJAX Push Engine (APE) is installed software that requires operations management and deployment while PubNub is a cloud-hosted, realtime data stream network that takes care of all the necessary administration, monitoring and analytics to support a massively scalable infrastructure. From a cost performance viewpoint, APE is far more expensive at the various ranges of required capacity as needs to scale the system grow.