If you're looking for a subtle smart lock that doesn't look like a smart lock, there's nothing else out there.  And the level lock works well as a smart lock when controlled via the Level app.  The touch feature is hit or miss -- sometimes it works, sometimes it doesn't.  And control via HomeKit (or Siri) is hit or miss as well...you need a homekit controller within range, and it takes a while or fails completely at times.