The Rigelians are a humanoid species from either the Alpha or Beta Quadrant. Their physiology and neurologically similar to Vulcans and Romulans. It is believed that there is four or five genders.
In early 2155, the Rigelians participated in talks discussing their interest in joining the Coalition of Planets with Humans, Tellarites, Andorians, Coridans, and Vulcans. During this time, commerce was regulated by the Regelian Trade Commission.