Founders Online is a research website providing free access to a digitized collection representing the papers of seven of the most influential figures in the founding of the United States.

The subjects they discussed between themselves and others ranged from public policies and democratic principles to slavery and the Constitution.

[1] The website's collection is the result of a 50-year effort by scholars to locate, transcribe, annotate, and digitize 18th and 19th century documents held by archives worldwide.

[1][3] The collection is derived from the letterpress editions of the Founders' original papers, which were drawn from the following sources:[5] Besides the complete works of these individuals, Founders Online includes the selected papers of John Jay, first Chief Justice of the U.S. Supreme Court.

Additional major funding is provided by a wide range of foundations, corporations, and private individuals.