You can connect your Zigbee-based smart devices to Alexa using the Zigbee hub built-in to the new Echo Show and Echo Plus, or through other Zigbee Certified hubs such as those from SmartThings and Wink. These options let you choose which aspects of a smart device solution you want to build, and the flexibility to support nearly any customer …
https://developer.amazon.com/en-US/alexa/devices/connected-devices/development-resources/zigbee