Daniel Ek is a Swedish entrepreneur and a technologist best known as the co-founder and CEO of the popular music streaming service Spotify. In 2005, Ek dropped out of the Royal Institute of Technology in Sweden after eight weeks, according to Forbes. He founded an online marketing company called Advertigo. Ek sold the business to the Swedish company Tradedoubler. He later teamed up with its founder to start Spotify in 2008. As of 2017, Daniel Ek has an estimated net worth of over $800 million. His main source of income is Spotify, which is currently worth $8 billion and has over 40 million users worldwide. Ek has also been awarded the tile "Billboard Power 100's New No. 1" and is on numerous "wealth charts".