https://www.techradar.com/news/amazon-alexa-can-now-unlock-your-yale-smart-lock-via-voice-commands

Are you interested in an Amazon smart lock for your connected home, but worried about Amazon Key’s hackable lock and disarm-able camera? Yale Locks could have a better, Alexa-enabled solution. 

Yale announced today that its Yale Assure Lock now supports voice unlocking through Amazon Alexa. You’ll be able to set up a four-to-eight-digit PIN, then speak that PIN out loud to unlock your Assure deadbolt when your hands are full.