One of the biggest integrations BlueMatch has is with HouseCanary. HouseCanary is a data intensive api that powers the BlueMatch pricing tool. HouseCanary data is used all over the real estate industry and is very popular with real estate appraisal software.
If the public record is accurate, BlueMatch has found HouseCanary is fairly accurate give or take a couple percent. We always suggest consulting with a professional when it comes to pricing your home, but HouseCanary is a great place to start.