Where’s the best place to shop for a mortgage? Bankrate, Rocket Mortgage all claim to have the lowest rates but there’s direct smaller lenders that definitely have them beat.
For instance Quicken/Rocket will have different rates going direct or going through a broker. If you have a lot of money invested with Chase/BOA they could give you a better rate than you would get elsewhere. The same can be true of a credit union, or you could get a discount even if you do not have a substantial amount of money invested with your bank.