One of the most common asks about new routing endpoints in Azure IoT Hub is to be able to route directly to Azure Functions. Having the power of serverless compute at your fingertips is very powerful and allows you to do all sorts of amazing things with your IoT data.
(Quick refresher: back in December 2016 we released message routing in IoT Hub. Message routing allows customers to setup automatic routing of events to different systems, and we take care of all of the difficult implementation architecture for you. Today you can configure your IoT Hub to route messages to your backend processing services via Service Bus queues, topics, and Event Hubs as custom endpoints for routing rules.)
Read about it on the Azure blog.