Sogou, the Internet service provider of Sohu, recorded $70 million in the fourth quarter of 2013, a 72% year-over-year increase or 23% quarter-over-quarter growth. Sogou + Soso had a combined 13.14% market share in December 2013, according to online data service CNZZ. Wang Xiaochuan, CEO of Sogou, said there’s synergy between the two search services that the majority of traffic on Soso, opposite from Sogou, is from mobile. Although Soso’s market share, 0.37%, is minor, Wang said they’d take advantage of Soso’s knowledge on mobile search. Sogou generated $216 million in revenue in 2013 and that’s a 65% growth.