Hazel de los Reyes once brewed coffee from a rewired popcorn machine, then won the 2005 Australian Barista Championship and was the inaugural Australian Cupping Champion in 2007. She and Clare Lim opened Coffee Alchemy in Sydney in 2003, and the two now co-own Gumption.
Their Brooklyn roastery sits in Industry City, where a Loring Kestrel S35 roasts behind glass. Its beans reach Manhattan through a second shop on West 45th Street in Midtown, which opened in October 2020.