Speech is known to be a source of information about the individual as well as their mental state and thus a valuable diagnostic tool. One of the crucial tasks facing the modern psychodiagnostics is predicting suicidal tendencies. One of the promising fields is analyzing speech of individuals who committed suicides. However, designing such text corpora is a daunting scientific task. The article describes the text corpora employed in studies of the features of speech of individuals who committed suicides (mostly in English) and introduces the first Russian corpus RusSuiCorpus and outlines the perspectives for further studies.