Residence (YAR) configuration for Home Assistant
unlocks with a wave gesture, displays Home Assistant UI
iOS Home Assistant app
Alexa has complete access over the entire set of devices and sensors through an Emulated Hue component in Home Assistant.
Currently Google Assistant's implementation relies entirely on IFTTT hooks to Home Assistant through the IFTTT Maker channel, which is less than optimal, but will hopefully change in the near future. Supports lights, accents, scenes, etc.