DuckDuckGo is a search engine that focuses on user privacy and does not track users or collect personal information. It sources results from over 50 sources and is a private company, though its founder claims it is profitable through serving ads and affiliate relationships. Since launching in 2008, DuckDuckGo has grown significantly, reaching 3 million daily searches in June 2013. While privacy is appealing to some users, DuckDuckGo is unlikely to overtake Google due to users' familiarity with personalized search results from Google.