Wise rapidly grew by solving a significant problem for customers, who lost too much money to banks when exchanging currency. They've attracted investment from some of the best investors in the world, from Andreesen Horowitz to Index Ventures and even Richard Branson.

The challenge for Wise will be maintaining their edge and brand power in a market that's becoming increasingly crowded with new entrants (like Revolut and Monzo) and incumbents (traditional banks) trying to catch up. To do so, the company is ramping up its digital and marketing strategies, as well as pushing for further development of its existing products.