SharpSpring and FunctionFox are two of the best advertising agency software because they are both cheaper and almost have the same features. The only difference between the two is that FunctionFox does not have the campaign donation management feature, but I believe that it is negligible.
SharpSpring helps companies to get more leads, convert these leads to sales, and easily track the companies return on investment (ROI). FunctionFox, on the other hand, helps companies to easily track the project from beginning to completion and increase the productivity of the employees which can, in turn, get more profit. If you are going to choose between these two, I recommend SharpSpring.