Ambit is currently available in 15 service areas, including Texas, Maryland, New York, New Jersey, Illinois, California, New Hampshire, and Washington, D.C. Just because your state is on the list, though, doesn’t mean that Ambit is available in your area. For example, in Texas, Ambit Energy is only available in some parts of the state, including Dallas and Houston, but not El Paso and Austin.  That’s because the deregulated energy market doesn’t extend to the entire Texas power grid. When searching for energy providers, you’ll need to enter your ZIP code to find out what electricity plans are available in your area.