Leading UK challenger bank, Revolut, is growing fast and now has around four million customers; they are adding new customers at the rate of 10,000 a day but by the end of the year they expect that number, in Europe alone, to be 50,000; they will double their headcount in the London office to achieve that goal; monthly active users have grown from 900,000 in July 2018 to 1.9 million today; Revolut plans to launch in seven new international markets in the near future. Source.