Arantza Díaz de Ilarraza Sánchez (born April 18, 1957) is a professor of informatics at the University of the Basque Country. In 1981, she began her work as a lecturer at the Faculty of Informatics of Donostia. In 1988, she created the Ixa Group along with four others, and in 2018, she retired as President of the HiTZ Center (Basque Center for Language Technology). Both Ixa and HiTZ are multidisciplinary teams (73 members, consisting of computer scientists, linguists and engineers) that promote research, training, technological transfer and innovation in the area of language technology, mainly for the Basque language.