NationBuilder is a software company that provides a platform for political campaigns, non-profit organizations, and other groups to manage their online presence. The company was founded in 2009 and is headquartered in Los Angeles, California. NationBuilder's platform includes tools for website creation, email marketing, social media management, and fundraising. The company has worked with a variety of clients, including Barack Obama's 2012 presidential campaign and the United Nations Foundation. NationBuilder has received funding from several venture capital firms, including Andreessen Horowitz and Omidyar Network.