Ratnākaraśānti (also known as Śāntipa) (c. 1000 CE) was one of the eighty-four Buddhist Mahāsiddhas and the chief debate-master at the monastic university of Vikramashila. At Vikramashila he was instructed by Nāropa, and taught both Atiśa and Maitrīpa. His texts include several influential commentaries to Buddhist tantras, as well as works of philosophy and logic.