OneWorld Boston, Inc. is a place-based philanthropy focused on eastern Middlesex, southern Essex, and Suffolk counties, in Massachusetts. It receives almost all of its funding in the form of grants from CFI, but is a completely separate organization. OneWorld Boston focuses its grant-making in roughly the same geographic areas from which CFI and its founders derived their funds in the first place.
Institute of World Justice, on the others hand, is a wholly owned subsidiary of Cummings Foundation. It focuses primarily on issues of genocide and the effects of genocide, especially in Rwanda, where it is currently building several major philanthropic relationships.