Atlantex Power vs Green Mountain Energy
Quick Verdict
Green Mountain Energy has 27 years in Texas. Atlantex Power has 1. That's not nothing—Green Mountain Energy survived every grid crisis since 1999.
Experience matters for stability. Price matters for your wallet. Check both on ComparePower.
26-Year Experience Gap
Green Mountain Energy: 27 years in Texas. Atlantex Power: 1 years. Companies don't survive 27 Texas summers by accident.
Complaint Comparison
PUCT Data • Jul-Dec 2025
Atlantex Power
Green Mountain Energy
Green Mountain Energy has 3.1 fewer complaints per 10k customers
Trust & Reputation
External ratings comparison
Trust Score is a weighted average: Google (40%), BBB (35%), Trustpilot (25%)
The Verdict
- You want competitive introductory rates from a new player
- You're comfortable being an early adopter
- You like modern, streamlined online experiences
- You want green energy options without premium pricing
- You want a company that's survived 27 Texas summers (Atlantex Power has 1)
- You want more green plan variety (check if they have actual renewable generation backing)
- You need month-to-month—Atlantex Power locks you in for 12 months minimum
Category Breakdown
27 years vs 1—26+ more grid crises survived
Both sell green plans—check who has actual renewable generation backing
Rates change constantly. Check ComparePower with your actual usage.
Side-by-Side Comparison
| Feature | Atlantex Power | Green Mountain Energy |
|---|---|---|
| Parent Company | Atlantic Energy | NRG Energy (NYSE: NRG) |
| Years in Texas | 1+ | 27+ |
| Headquarters | The Woodlands, Texas | Austin, Texas |
| Fixed-Rate Plans | ||
| Variable Plans | ||
| Prepaid Options | ||
| Green Energy | ||
| Free Nights/Weekends | ||
| Deposit Required | Conditional | Conditional |
| Credit Check |
What Actually Differs
Atlantex Power and Green Mountain 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
Atlantex Power: Owned by Atlantic Energy. 1 years in Texas—they've survived enough grid crises to prove they won't fold mid-contract. Based in The Woodlands, Texas.
Green Mountain Energy: Owned by NRG Energy (NYSE: NRG). 27 years in Texas—that track record matters when you're signing a multi-year contract. Based in Austin, Texas.
What They Actually Sell
Atlantex Power offers fixed-rate. They sell "green" plans (mostly accounting—same electrons, but they buy renewable credits).
Green Mountain Energy offers fixed-rate, variable-rate, green. They sell "green" plans (mostly accounting—same electrons, but they buy renewable credits).
The Money Part
Atlantex Power: Deposit depends on credit—expect $200-400 if your score is below 600.
Green Mountain 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 up to the "Choose if..." sections—they'll tell you which one fits your situation. For actual rates, check ComparePower. Takes 2 minutes.
Company Snapshots
Atlantex Power
- Parent Company
- Atlantic Energy
- Years in Texas
- 1+
- Headquarters
- The Woodlands, Texas
- Deposit Required
- conditional
Green Mountain Energy
- Parent Company
- NRG Energy (NYSE: NRG)
- Years in Texas
- 27+
- Headquarters
- Austin, Texas
- Deposit Required
- conditional
More Head-to-Head Matchups
See who wins when Atlantex Power and Green Mountain Energy face other competitors.
Featured In Best-Of Lists
See where Atlantex Power and Green Mountain Energy are featured in our category guides.
Related Guides
How to Lower Your Electric Bill in Texas (12 Proven Ways)
The average Texas home spends $151/month on electricity. Here are 12 specific ways to cut that bill, from free habits to smart investments.
guidesTexas Solar Buyback Plans: Getting Paid for Your Solar Power
Texas has no net metering law, but solar buyback plans let you earn credit for excess power. Here's how they work, which providers offer the best rates, and whether it's worth it for your home.
explainersUnderstanding Texas Electricity Deregulation: How the Market Actually Works
Texas deregulated electricity in 2002. Here's how the system works, why prices vary so much, and what it means for you as a customer.
"I like that it searched multiple companies for me. So I don't have to search one by one. Saves time."
— Lacy L., Texas
See Current Rates
Compare current plans from both companies.
Frequently Asked Questions
Q: When should I choose Atlantex Power over Green Mountain Energy? ▼
You want competitive introductory rates from a new player. You're comfortable being an early adopter. You like modern, streamlined online experiences. You want green energy options without premium pricing.
Q: When should I choose Green Mountain Energy over Atlantex Power? ▼
You want a company that's survived 27 Texas summers (Atlantex Power has 1). You want more green plan variety (check if they have actual renewable generation backing). You need month-to-month—Atlantex Power locks you in for 12 months minimum.
Q: What is the main difference between Atlantex Power and Green Mountain Energy? ▼
Green Mountain Energy leads in track record. Both companies deliver the same electricity through the same grid—the real differences are in pricing, service quality, and available plan types.
Q: Is Atlantex Power or Green Mountain 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, Atlantex Power or Green Mountain Energy? ▼
Green Mountain Energy: 27 years. Atlantex Power: 1 years. That 26-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: Which is better for green energy, Atlantex Power or Green Mountain 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 Atlantex Power and Green Mountain Energy offer? ▼
Atlantex Power: fixed-rate. Green Mountain Energy: fixed-rate, variable-rate, green. Green Mountain Energy has more options (3 plan types vs 1). More options = more ways to optimize, but also more ways to pick wrong. If you just want simple fixed-rate power, ignore the complexity. If you have specific needs (EV charging at night, pool pump, work-from-home AC), the right specialty plan can save you $50/month.
Q: Which is better overall, Atlantex Power or Green Mountain Energy? ▼
Same grid. Same wires. Same electrons. The electricity is literally identical—the only differences are price, service, and plan options. Atlantex Power wins if you want competitive introductory rates from a new player. Green Mountain Energy wins if you'll pay 15-25% more for authentic renewable energy--and feel good about it. For everyone else? Whoever's cheaper for your usage right now. Check ComparePower—it takes 2 minutes.