Brazil: number of Pix keys 2020, by bank
Mercado Pago ranked second with 4.73 million keys, followed by UOL's PagSeguro with 4.32 million keys.
As of October 14, 2020, Nubank had over eight million Pix keys registered in Brazil. A Pix key allows a bank user in the South American country to transfer money online instantaneously. Mercado Libre's