What are some alternatives?
When comparing Near Lock and Front Door, you can also consider the following products
USB Raptor - Lock and unlock your computer using USB flash drives as keys.
Knock - Sell your home in 6 weeks or less
MacID - Unlock your Mac with just your fingerprint, passcode, or wrist – without even unlocking your iOS...
SimpleShowing - The way to tour and buy a home
Predator - PREDATOR locks your PC when you are away, even if your Windows session is still opened.
Trelora - The smartest way to buy and sell homes