GuideStar is a nonprofit organization that provides information about other nonprofits in the United States. It aims to promote transparency and accountability by offering access to data on financial performance, mission statements, and program outcomes. Users can search for specific organizations or browse by categories to find relevant information. Founded in 1994, GuideStar collects data from various sources, including the IRS and nonprofit organizations themselves. The platform allows donors, researchers, and the general public to make informed decisions about charitable giving and nonprofit engagement. By providing comprehensive insights, GuideStar helps foster trust in the nonprofit sector.