Byblos provides a list of services that include retail, corporate, private and correspondent banking. It also offers, through its subsidiaries, insurance, and investment services.
During the 1975 civil war in Lebanon, Byblos expanded internationally by establishing a sister bank in Brussels in 1976 as well as branches in Paris in 1980, London in 1981, and Cyprus in 1984. It focused on serving Lebanese and Arab clientele in addition to serving as correspondent banker for selected banks in some Middle Eastern countries.