August

August popularized the consumer retrofit smart lock and remains a host favorite for the same reason renters love it: it mounts on the interior side of an existing deadbolt, keeps the original keys working, and installs in minutes. Now part of lock giant ASSA ABLOY alongside Yale, August pairs auto-unlock convenience with guest codes via keypad accessory and integrations into rental automation tools. Its consumer DNA cuts both ways, easy and affordable, but battery and connectivity management across a portfolio demands discipline. For individual hosts it is often the first smart lock, and a perfectly serviceable one.