Stem Inc (Stem) formerly Star Peak Energy Transition Corp. is an energy storage solution provider.

The company offers services such as Energy Storage, Solar Plus Storage, Wholesale Energy Markets, Microgrids and Backup Power, Utility Bill Optimization, Demand Response, Commercial EV Charging, Sustainability and Professional Services. It also enagaged in offering clean energy intelligence and optimization. Stem’s energy software platform, Athena, is an artificial intelligence (AI)-powered analytics platform that enables customers and partners to optimize energy use by automatically switching between battery power, onsite generation and grid power. Stem is headquartered in California, United States.