Green Mountain Energy vs Xoom Energy
Quick Verdict
Plot twist: same corporate parent. Different marketing, same billing system. You're picking which brand name gets your check.
Since they're the same company, check ComparePower to see which brand is offering better rates right now.
Same corporate owner: NRG Energy owns both Green Mountain Energy and Xoom Energy. Different brands, same billing system, same corporate parent.
Plot Twist: Same Company
Same corporate owner: NRG Energy owns both Green Mountain Energy and Xoom Energy. Different brands, same billing system, same corporate parent.
What Actually Differs
Green Mountain Energy and Xoom Energy deliver the exact same electricity through the exact same wires. The electrons don't care whose logo is on your bill. What differs: the price, the service when something goes wrong, and the fine print in contracts.
Who's Behind These Companies
Green Mountain Energy: Owned by NRG Energy (NYSE: NRG). 29 years in Texas—they've survived enough grid crises to prove they won't fold mid-contract. Based in Houston, Texas.
Xoom Energy: Owned by NRG Energy (NYSE: NRG). 15 years in Texas—that track record matters when you're signing a multi-year contract. Based in Huntersville, North Carolina.
What They Actually Sell
Green Mountain Energy offers fixed-rate, variable-rate, green, solar-buyback. They sell "green" plans (mostly accounting—same electrons, but they buy renewable credits).
Xoom Energy offers fixed-rate, variable-rate, prepaid, green. They sell "green" plans (mostly accounting—same electrons, but they buy renewable credits). They offer a prepaid billing option.
The Money Part
Green Mountain Energy: Deposit depends on credit—expect $200-400 if your score is below 600.
Xoom Energy: Deposit depends on credit—expect $200-400 if your score is below 600.
The Honest Answer
Both are legitimate. Neither is a scam. The electricity is identical. What matters is: (1) who's cheaper for your actual usage, (2) whether you need to skip a credit check, and (3) if you care about green marketing. Scroll down to "The Verdict" for the quick answer. For actual rates, check ComparePower. Takes 2 minutes.
See how they compare on price
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Category Breakdown
29 years vs 15—14+ more grid crises survived
Both sell green plans—check who has actual renewable generation backing
Xoom Energy offers a prepaid option. Green Mountain Energy requires standard credit enrollment.
Rates change constantly. Check ComparePower with your actual usage.
Side-by-Side Comparison
| Feature | Green Mountain Energy | Xoom Energy |
|---|---|---|
| Parent Company | NRG Energy (NYSE: NRG) | NRG Energy (NYSE: NRG) |
| Years in Texas | 29+ | 15+ |
| Headquarters | Houston, Texas | Huntersville, North Carolina |
| Fixed-Rate Plans | ||
| Variable Plans | ||
| Prepaid Options | ||
| Green Energy | ||
| Free Nights/Weekends | ||
| Deposit Required | Conditional | Conditional |
| Credit Check |
Trust & Complaint Data ▼
Trust & Reputation
External ratings comparison
Trust Score is a weighted average: Google (40%), BBB (35%), Trustpilot (25%)
Complaint Comparison
PUCT Data • Jul-Dec 2025
Green Mountain Energy
Xoom Energy
Green Mountain Energy has 4.3 fewer complaints per 10k customers
The Verdict
- You want a company that's survived 29 Texas summers (Xoom Energy has 15)
- You want more green plan variety (check if they have actual renewable generation backing)
- You need month-to-month—Xoom Energy locks you in for 6 months minimum
- You want a prepaid pay-as-you-go option—Green Mountain Energy doesn't offer one
- You want an NRG-backed provider with online signup and prepaid options
- You know an ACN rep you want to support through their direct sales channel
- You want the Freedom2Connect ETF buyout when switching providers
Done researching? See actual rates.
Green Mountain Energy or Xoom Energy — find out which one is cheaper at your address.
Frequently Asked Questions
Q: When should I choose Green Mountain Energy over Xoom Energy? ▼
You want a company that's survived 29 Texas summers (Xoom Energy has 15). You want more green plan variety (check if they have actual renewable generation backing). You need month-to-month—Xoom Energy locks you in for 6 months minimum.
Q: When should I choose Xoom Energy over Green Mountain Energy? ▼
You want a prepaid pay-as-you-go option—Green Mountain Energy doesn't offer one. You want an NRG-backed provider with online signup and prepaid options. You know an ACN rep you want to support through their direct sales channel. You want the Freedom2Connect ETF buyout when switching providers.
Q: What is the main difference between Green Mountain Energy and Xoom Energy? ▼
Green Mountain Energy wins on track record. Xoom Energy wins on credit flexibility. Both deliver identical electricity through the same wires—the difference is pricing structure, customer service, and plan options.
Q: Are Green Mountain Energy and Xoom Energy the same company? ▼
Plot twist: yes. Green Mountain Energy and Xoom Energy are both owned by NRG Energy. Same corporate parent, same billing system, different marketing. You're not comparing competitors—you're picking which brand name NRG Energy uses to take your money. The only real question: which brand gets better rates right now. Check ComparePower.
Q: Is Green Mountain Energy or Xoom Energy cheaper? ▼
Anyone who answers this without knowing your zip code and usage is lying. The "advertised rate" is calculated at exactly 1,000 kWh—use 800 or 1,200 and the math changes completely. Both companies exploit this. Check ComparePower with your actual usage. Takes 2 minutes, and you'll see real numbers instead of marketing.
Q: Which company has been in Texas longer, Green Mountain Energy or Xoom Energy? ▼
Green Mountain Energy: 29 years. Xoom Energy: 15 years. That 14-year gap matters—Green Mountain Energy survived the 2011 freeze, the 2021 disaster, and every summer in between. Track records like that don't happen by accident.
Q: Do Green Mountain Energy or Xoom Energy offer no-deposit electricity? ▼
Xoom Energy offers a prepaid option. Green Mountain Energy doesn't have prepaid. Both run credit checks for standard plans and may require deposits based on your credit history.
Q: Which is better for green energy, Green Mountain Energy or Xoom Energy? ▼
Both sell "green" plans. But "green" in Texas electricity means they buy renewable energy credits—it's accounting, not physics. Your electrons come from the same grid as everyone else. Want to know which has renewable generation backing versus just buying paper credits? Gexa has NextEra (the largest renewable generator in the US) behind them. Most others just buy credits. That's the difference.
Q: What types of plans do Green Mountain Energy and Xoom Energy offer? ▼
Green Mountain Energy: fixed-rate, variable-rate, green, solar-buyback. Xoom Energy: fixed-rate, variable-rate, prepaid, green. Similar variety. Both have enough options for most situations.
More Head-to-Head Matchups
See who wins when Green Mountain Energy and Xoom Energy face other competitors.
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