https://techcrunch.com/2020/01/27/n26-reaches-5-million-customers-including-250000-in-the-us/

Challenger bank N26 has reached 5 million customers. In 2019 alone, N26 managed to add over 2.5 million customers. And the company’s growth rate seems to be accelerating as N26 reached 3.5 million customers in June 2019.

That represents an addition of 1 million customers during the first half of 2019 and an addition of 1.5 million customers during the second half of 2019.