Skynet provides cloud infrastructure for IoT applications, but Crowsnest is aiming to have a few additional things on top of that:

    - a rich ecosystem of device integrations,
    - a framework for quickly creating new integrations, and
    - an API that abstracts these devices into organized classes with 
    their capabilities

We are actually strongly considering Skynet as a core tool of our backend to manage all of our machine-to-machine messaging.