Green Mountain Energy vs Flagship Power: Why Flagship Is Gone
Flagship Power Is No Longer Operating
Flagship Power shut down in May 2024. Their customers were transferred to Atlantex Power and AE Texas. You cannot sign up for Flagship Power — they no longer exist as a retail electricity provider in Texas.
If you landed here comparing options, Green Mountain Energy is still actively enrolling customers.
At a Glance
| Factor | Green Mountain Energy | Flagship Power |
|---|---|---|
| Status | Active | Shut down May 2024 |
| Parent Company | NRG Energy | Utility Rescue Holdings (defunct) |
| Years in Texas | 29 | Was 5 before closing |
| Green Plans | Yes (100% renewable) | Never offered |
| On ComparePower | Yes | No |
Bottom Line: This is no longer a real comparison. Flagship Power closed in May 2024. Green Mountain Energy remains the gold standard for renewable electricity in Texas — 29 years of 100% green energy with NRG’s Fortune 500 backing.
What Happened to Flagship Power?
Flagship Power operated from 2019 to May 2024 as an independent provider that competed purely on rock-bottom pricing. No green options. No corporate parent. No frills.
In May 2024, Flagship ceased operations. Customers were transferred to Atlantex Power and AE Texas.
Why Green Mountain Energy Is Still Here
Green Mountain Energy was America’s first company dedicated exclusively to cleaner energy. Founded in 1997, they have operated in Texas for 29 years. Now owned by NRG Energy, they combine genuine environmental commitment with Fortune 500 financial stability.
What Green Mountain Energy offers:
- 100% renewable electricity plans (wind and solar sourced)
- Solar buyback plans for rooftop solar customers
- Fixed-rate and variable plan options
- 29 years of clean energy track record in Texas
- NRG Energy backing — same parent as Reliant and Direct Energy
Green Mountain charges premium rates — typically 15-25% above budget providers. That premium goes toward renewable energy sourcing and green infrastructure. If price is your only priority, Green Mountain is not the right fit.
If You Were a Flagship Customer
Your account was likely transferred to Atlantex Power or AE Texas. Verify your current rate and plan terms.
If budget rates were your priority, Green Mountain is a premium option that will cost more. For budget providers with corporate backing, check Discount Power or Frontier Utilities. If you want green energy at competitive rates, Atlantex Power offers green plans at lower price points than Green Mountain.
The Verdict
Choose Green Mountain Energy if environmental impact is worth paying a premium — 29 years of 100% renewable energy with NRG’s Fortune 500 backing makes them the most proven green provider in Texas.
Looking for Flagship’s replacement? Check Atlantex Power’s profile or compare current rates on ComparePower.
Related Pages
Company Profiles
Related Comparisons
See how they compare on price
Enter your ZIP code. Real plans, real prices — takes 30 seconds.
Category Breakdown
Green Mountain is actively enrolling; Flagship shut down in May 2024
29 years of 100% renewable focus; Flagship never offered green plans
NRG Energy (NYSE: NRG) vs Flagship's defunct Utility Rescue Holdings
29 years as America's first green electricity company
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
Flagship Power
Green Mountain Energy
Green Mountain Energy has 3.7 fewer complaints per 10k customers
The Verdict
- This comparison is historical only -- Flagship Power shut down in May 2024
- Flagship's customers were moved to Atlantex Power and AE Texas
- You cannot sign up for Flagship Power -- they no longer exist
- If you were a Flagship customer, check your transfer to Atlantex Power
- Environmental impact matters -- Green Mountain has 29 years of renewable energy focus
- NRG Energy (NYSE: NRG) backing gives you unquestionable financial stability
- You want 100% renewable plans with wind and solar sourcing
- Solar buyback for rooftop panels is part of your energy strategy
Done researching? See actual rates.
Flagship Power or Green Mountain Energy — find out which one is cheaper at your address.
Frequently Asked Questions
Q: When should I choose Flagship Power over Green Mountain Energy? ▼
This comparison is historical only -- Flagship Power shut down in May 2024. Flagship's customers were moved to Atlantex Power and AE Texas. You cannot sign up for Flagship Power -- they no longer exist. If you were a Flagship customer, check your transfer to Atlantex Power.
Q: When should I choose Green Mountain Energy over Flagship Power? ▼
Environmental impact matters -- Green Mountain has 29 years of renewable energy focus. NRG Energy (NYSE: NRG) backing gives you unquestionable financial stability. You want 100% renewable plans with wind and solar sourcing. Solar buyback for rooftop panels is part of your energy strategy.
Q: What is the main difference between Flagship Power and Green Mountain Energy? ▼
Green Mountain Energy leads in availability, green energy, corporate stability, track record. Both companies deliver the same electricity through the same grid—the real differences are in pricing, service quality, and available plan types.
More Head-to-Head Matchups
See who wins when Flagship Power and Green Mountain Energy face other competitors.
Featured In Best-Of Lists
See where Flagship Power and Green Mountain Energy are featured in our category guides.
Related Guides
Green Energy Plans in Texas: Sorting Real Renewables from Greenwashing
Not all '100% renewable' plans are what they claim. Here's how green energy plans actually work in Texas, who's genuine, and who's just buying paper credits.
tipsHow 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.