The goal of font pairing is to select fonts that share an overarching theme yet have a pleasing contrast. Which fonts work together is largely a matter of intuition, but we approach this problem with a neural net. See Github for more technical details.
Click (Generate) to create a new font pairing, (Lock) to lock fonts that you want to keep, and (Edit) to choose a font manually. The text is editable, try replacing it with your company name or other copy.