Past and present Prometheus clients include:
BBN Inc.
Cisco Systems
DARPA Defense Sciences Office
Hale and Dorr
NATO
NAVSEA
SPAWAR
U.S. Air Force Brooks AFB / Citybase
U.S. Air Force Office of Scientific Research
U.S. Air Force Rome Laboratories
U.S. Army Space and Missile Defense Command
U.S. Naval Undersea Warfare Center
U.S. Office of Naval Research