Wikipedia
Yandex is a Russian multinational technology company specializing in Internet-related services and products. Yandex operates the largest search engine in Russia with about 60% market share in that country. It also develops a number of Internet-based services and products. Yandex ranked as the 4th largest search engine worldwide, based on information from Comscore.com, with more than 150 million searches per day as of April 2012, and more than 50.5 million visitors (all company's services) daily as of February 2013. The company's mission is to provide answers to any questions users have or think about (explicit or implicit). Yandex also has a very large presence in Ukraine and Kazakhstan, providing nearly a third of all search results in those markets and 43% of all search results in Belarus.
The Yandex.ru home page has been rated the most popular website in Russia. The web site also operates in Belarus, Kazakhstan, Ukraine and Turkey. Yandex Labs is a wholly owned division of Yandex located in the San Francisco Bay Area. In 2014, Yandex announced plans to open a research and development office in Berlin, Germany.
It opened the first sales office outside the CIS countries in Lucerne, Switzerland in 2012 for its European advertising clients, and the second one in Shanghai, China in 2015 for Chinese companies that work on the Russian language market.