An energy retailer is the company that sells electricity or gas to you, sends your bills, manages your plan and usually handles payments and customer support. The distributor owns and maintains the local poles, wires, pipes and meters, and is responsible for delivering energy to your property. You can often choose your retailer, but your distributor is determined by your location. Compare plans through government comparison tools or retailer websites, and check the offer details, rates, fees and contract terms before switching.