However, you can't use your voice to control it with Alexa or another voice assistant as you can with August's and Schlage's smart locks. MORE: Know Where Your Kids Are With These GPS TrackersWhile some Nest products such as the Nest Learning Thermostat, Nest Protect smoke alarm and Nest Cam have IFTTT support, as of this writing, the Nest Hello does not, although some Nest Cam recipes do work. Nest Hello's facial recognition seems like a natural fit for this kind of automation — imagine setting different rules for different people — so we hope it comes along eventually. Bottom LineThe facial recognition feature in the Nest Hello gives this video doorbell a more personal experience than the competition. In addition, its quality HDR video, strong speaker and microphone, and well made and frequently updated Nest app were tops among the other video doorbells we've tested. While you need a Nest Aware subscription and its recurring cost to get the most out of it, the Nest Hello is the best video doorbell yet.