- Gensym is a leading provider of expert-system software products that monitor, diagnose, control, and optimize complex operational processes in real time. In use by the world's largest organizations, Gensym software is powered by G2®, the company's unique, high-performance reasoning-engine technology. Copyright 2000-2002 Gensym Corporation. All rights reserved. Contact us. Gensym ...www.gensym.com