GuideStar
（重定向自Guidestar.org）
GuideStar USA, Inc. is an information service specializing in reporting on U.S. nonprofit companies. In 2010, their database contained over 5 million IRS Forms 990 on 1.9 million organizations.
GuideStar was the first central source of information on U.S. nonprofits. According to the company, GuideStar was founded in Williamsburg, Virginia, in September 1994 and received tax-exempt status in 1996, the same year the company began posting nonprofit organizations' financial reports to the World Wide Web.