Constellation vs Xoom Energy

Two national retail energy brands operating in Georgia, both owned outside the state. On filed rates this is the most lopsided pairing on the chart.

Xoom Energy has been the cheaper of the two in 87 of the 88 months since January 2019 when both filed a standard 12-month fixed plan.

This month, Xoom Energy is cheaper by $117 a year: $1,189.73 against $1,073.15, on the same annual-cost method as every plan on this site.

Side by side, September 2026

Constellation and Xoom Energy on the Georgia PSC's September 2026 fixed chart, standard 12-month plans. Source: PSC September 2026 fixed chart.
	Constellation	Xoom Energy
Rate per therm	0.8390	0.6590
Service charge at sign-up	$5.95	$5.85
Estimated annual cost	$1,189.73	$1,073.15
Early termination fee	$150.00	$100.00
Based in Georgia	No	No
Owner	Constellation Energy	NRG Energy
PSC complaints, 24 months	50	97
Google rating	4.9 (7,998 reviews)	4.5 (815 reviews)

The record since January 2019

Months each marketer filed the cheaper standard 12-month fixed plan, by estimated annual cost, from the Georgia PSC's monthly charts. Ties are gaps under half a cent a year.
Marketer	Months cheaper	Share	Months filed since 2019
Constellation	1	1%	88
Xoom Energy	87	99%	88

Xoom Energy has been the cheaper of the two for 45 consecutive months, up to September 2026.
The widest the two have been apart was April 2022, when Xoom Energy was $388.38 a year cheaper.
Both filed a standard 12-month fixed plan in 88 of the months we have published; Constellation filed in 88 months overall and Xoom Energy in 88.

Neither is necessarily the cheapest plan in Georgia: the full table ranks all of them, and how to read a head-to-head record explains what this page can and cannot tell you. Figures as filed with the Georgia PSC; the archive behind the record is history.csv. The Georgia Public Service Commission does not rank or endorse marketers.

Before you switch

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How to switch marketer
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Atlanta Gas Light's system is split into nine geographic pool groups, and marketers restrict some of their best plans to the Atlanta ones. Here is how to tell whether a rate is open to you.