Best Worst Worst Best A Z Energy Companies : Best to Worst Company Ranking Rating (0-5) Stars Georgia Natural Gas 1 5 SCANA Energy 2 4.8 Constellation 3 4.05 Gas South 4 4 Infinite Energy 5 3.52 XOOM Energy 6 3.43 Just Energy 7 3.41 Fireside Natural Gas 8 3.3 Kratos Gas and Power 9 3.2 True Natural Gas 10 3.1 Walton EMC Natural Gas 11 3.1 Colonial Energy 12 2.7 North American Power 13 2.45 Mansfield Power and Gas 14 2.2 Stream Energy 15 1.75 Energy Companies : Worst to Best Company Ranking Rating (0-5) Stars Stream Energy 1 1.75 Mansfield Power and Gas 2 2.2 North American Power 3 2.45 Colonial Energy 4 2.7 True Natural Gas 5 3.1 Walton EMC Natural Gas 6 3.1 Kratos Gas and Power 7 3.2 Fireside Natural Gas 8 3.3 Just Energy 9 3.41 XOOM Energy 10 3.43 Infinite Energy 11 3.52 Gas South 12 4 Constellation 13 4.05 SCANA Energy 14 4.8 Georgia Natural Gas 15 5 Energy Companies : By Name Company Ranking Rating (0-5) Stars Colonial Energy 1 2.7 Constellation 2 4.05 Fireside Natural Gas 3 3.3 Gas South 4 4 Georgia Natural Gas 5 5 Infinite Energy 6 3.52 Just Energy 7 3.41 Kratos Gas and Power 8 3.2 Mansfield Power and Gas 9 2.2 North American Power 10 2.45 SCANA Energy 11 4.8 Stream Energy 12 1.75 True Natural Gas 13 3.1 Walton EMC Natural Gas 14 3.1 XOOM Energy 15 3.43