EndNote is a commercial reference management software package, used to manage bibliographies and references when writing essays, reports and articles. EndNote was written by Richard Niles, and ownership changed hands several times since it was launched in 1989 by Niles & Associates: in 2000 it was acquired by Institute for Scientific Information's ResearchSoft Division, part of Thomson Corporation, and in 2016 by Clarivate (then named Clarivate Analytics). EndNote's main competitors are Mendeley and Zotero.