Justin Waldron (June 18, 1988) is an American internet entrepreneur best known as the co-founder of Zynga, which makes online social and mobile games.
Zynga is considered to be the pioneer of the social and mobile gaming industries, responsible for creating many of the microtransaction and viral marketing business models which are now ubiquitous.
Within four years of its founding, Zynga grew to $1 billion in annual revenue, faster than any other internet company.
In 2011 Zynga held the largest IPO since Google, with a valuation of over $10 billion.
Waldron left Zynga in October 2013 and is currently an active angel investor and advisor in various other technology companies.
Zynga's top games include: CityVille, FarmVille, The Pioneer Trail, Zynga Poker, Mafia Wars, Empires & Allies, and Adventure World.