MapLight is a nonpartisan, nonprofit research organization that reveals and tracks the influence of money in politics in the United States.

[1] The organization publishes a free public database linking money and politics data sources, including campaign contributions to politicians, how politicians vote on bills, and support and opposition to legislation.

MapLight uses an in-house research team in addition to data sources that include OpenSecrets and GovTrack.

MapLight advocates for public funding of elections and increased campaign finance regulations.

[4] In June 2014, Politico reported that MapLight was a recipient of funding through the Democracy Alliance, a network of liberal donors who coordinate their anonymous political giving.