That is a great question! The Xfinity Home App does not link up or allow voice commands with Apple's Siri. If you have any additional questions, please feel free to ask. Thank you!
What voice commands are you capable of? With such a walled off smart home ecosystem you should be capable of providing this service yourself, or at minimum be providing superior technical and customer service to make your customers want to stay.
For now, we are focused on integration of voice commands for Xfinity Home with our X1 Voice Remote.
For example, we are beginnig to roll out the ability to say things like "Show me people clips" and "Show clips of cars" for customers who have cameras and 24/7 Video Recording.
Here is a list of what you can currently say into your voice remote: