Green Mountain Energy Company is a United States company that offers electricity products, carbon offsets, and "sustainable solutions" to residential and commercial customers. Green Mountain Energy began in Vermont in August 1997 as an offshoot of Green Mountain Power to take advantage of electricity deregulation around the country. The company moved its headquarters to its current location in Austin, Texas in September 2000. Green Mountain began serving the Texas competitive market in January 2002, and was the first retailer to offer alternative energy in the state. Competitors of Green Mountain include Reliant Energy, Champion Energy, Texas Power, TXU, Gexa Energy, and Direct Energy.