Business Insider provides data on the number of challenger banks by country; this week Carrefour Banque, a subsidiary of Carrefour, that also operates a multinational retailer, shared that they were launching a new current account under the name C-Zam; the retailer operates in 30 countries and has over 1,000 stores in France which puts them in a unique position to acquire customers; other players prevalent in the French market include BNP Paribas which launched Hello Bank in 2013 and ING Direct which launched in 2010; startups Qonto and N26 also operate in Europe. Source
