The American Institute of Bisexuality, Inc. (AIB) is a charity founded by Fritz Klein to promote research and education about bisexuality. It is also known as the Bisexual Foundation. AIB is a California nonprofit corporation qualified for tax purposes as a public charity under Section 501(c)(3) of the U.S. Internal Revenue Code.
The Mission Statement for AIB states: "AIB encourages, supports and assists research and education about bisexuality, through programs likely to make a material difference and enhance public knowledge and awareness."
Historically, AIB has provided financial support in the form of loans or grants to: organizers of periodic conferences on bisexual issues; the website at bisexual.org; the Journal of Bisexuality; and grants to individual academic researchers.