First Time Ranking of the Strongest Social Network Brands. A global study carried out by the brand value rating agency BV4, in cooperation with the Department of Social Media Management of the HWZ University of Applied Sciences in Business Administration Zurich, ranks for the first time the most valuable social network brands. Facebook takes the top of the ranking with an estimated brand value of 29.115 bn $, followed by YouTube with a brand value of 18.099 bn $, and Twitter with 13.309 bn $. Less well known in the Western world is the Chinese network Qzone which, with a brand value of 11.237 bn $, is in fourth position. Together, the thirty most valuable brands have a brand value of 125 bn $.