VK (originally VKontakte) is very popular in Russia and former Soviet republics. It includes general social media sharing, music upload, listening and search.

It was launched in 2011 and has 249,409,900 registered users today. It is 8th most popular social networking site in the world.

As most social networks, VK offers sharing different media content including pictures, videos and music. One of its special features is an advanced search engine, that allows complex queries for finding friends, as well as a real-time news search.