Grevillea exul is a species of flowering plant in the family Proteacae, endemic to New Caledonia. It grows up to 10 metres in height and has narrow lancelolate to elliptic leaves which have a blunt apex. The flowers are usually white, followed by follicles which are 12 to 20 mm long and 9 to 15 mm in width. Two subspecies are currently recognised - subsp. exul (grevillea blanc) and subsp. rubignosa which has pink flowers.