Green Mountain Energy vs Cirro Energy
Complaint Comparison
PUCT Data • Jul-Dec 2025
Cirro Energy
Green Mountain Energy
Green Mountain Energy has 3.6 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 green energy included without paying Green Mountain's premium
- The 30-day satisfaction guarantee reduces your switching risk
- Budget matters more than environmental credibility
- You'd save $200-$300/year for functionally similar green energy
- Environmental credibility matters--you want the 27-year pioneer
- Direct wind/solar farm contracts matter more than REC offsets
- You want staff who genuinely understand renewable energy
- The premium price is worth authentic environmental commitment
Category Breakdown
Cirro saves 15-25% over Green Mountain's premium rates
27 years and direct sourcing vs green-included but not mission-driven
Both owned by NRG Energy--identical Fortune 500 backing
30-day satisfaction guarantee vs standard contract terms
Both mid-tier; Green Mountain has green expertise, Cirro has higher complaints
Side-by-Side Comparison
| Feature | Cirro Energy | Green Mountain Energy |
|---|---|---|
| Parent Company | NRG Energy | NRG Energy |
| Years in Texas | 24+ | 27+ |
| Service Areas | Oncor, CenterPoint, AEP, TNMP | Oncor, CenterPoint, AEP, TNMP |
| Fixed-Rate Plans | ||
| Variable Plans | ||
| Green Energy | 100% (included in all plans) | 100% (direct sourcing) |
| Prepaid Options | ||
| Contract Lengths | 1-36 months | 1-36 months |
| Deposit Required | Conditional | Conditional |
| Satisfaction Guarantee | 30 days | No |
At a Glance
| Factor | Green Mountain Energy | Cirro Energy |
|---|---|---|
| Best For | Environmental purists | Budget green energy |
| Price Level | Premium | Mid-tier |
| Green Energy | 100% (direct sourcing) | 100% (included) |
| Years in Texas | 27+ | 24+ |
| Satisfaction Guarantee | No | 30 days |
Bottom Line: Both NRG brands, both 100% green. Green Mountain charges premium for environmental credibility and direct wind/solar sourcing. Cirro includes green at lower rates but isn’t a mission-driven green company. Same electrons, different stories, $200-$300/year difference.
The Short Answer
NRG owns both companies. This is the same corporation selling green electricity at two different price points with two different value propositions.
Green Mountain is the environmental purist option. Founded in 1997, direct wind/solar farm contracts, 27 years of track record. They’ve never sold non-renewable electricity. The premium is for credibility and sourcing quality.
Cirro includes green energy in every plan at no extra charge. They’re not a mission-driven environmental company—they’re a mid-tier electricity provider that happens to offset with renewables. The savings are real; the environmental story isn’t as deep.
The NRG Green Spectrum
NRG’s green electricity portfolio:
Green Mountain Energy: Premium environmental brand. Direct sourcing contracts. $250-$400 above budget rates. For environmental purists.
Cirro Energy: Mid-tier green-included brand. Renewable offsets in every plan. $100-$200 above budget rates. For budget-conscious green shoppers.
Reliant Energy: Premium brand with optional green add-on. Extra cost for renewable plans. For customers who want features first, green second.
When choosing between Green Mountain and Cirro, you’re choosing between premium environmental credibility and budget green electricity.
What “Green” Actually Means
Both companies claim 100% renewable energy. The details differ:
Green Mountain:
- Contracts directly with Texas wind and solar farms
- Your money funds actual renewable infrastructure
- 27 years of environmental focus before deregulation
- Transparent sourcing—they publish which farms supply power
- Staff trained on renewable energy details
Cirro:
- Includes green energy offset in all plans
- Less transparent about sourcing specifics
- Not a mission-driven environmental company
- Green is a feature, not their identity
- Standard customer service without green expertise
The electrons on the grid are identical. The infrastructure investment is different.
The Price Math
On a typical 1,200 kWh/month household:
Green Mountain: ~14-16¢/kWh = ~$180/month Cirro Energy: ~10-12¢/kWh = ~$144/month Annual difference: $250-$400
That’s the cost of environmental credibility and direct sourcing. Whether it’s worth it depends on whether “green” is your identity or just a checkbox.
The Customer Service Trade-Off
Green Mountain:
- Mid-tier service infrastructure
- 10-15 minute average phone waits
- Staff understand renewable energy sourcing
- Can answer detailed questions about where your power comes from
Cirro:
- Mid-tier service infrastructure
- Above-average PUCT complaint rate
- Phone support closes at 10pm (not 24/7)
- 30-day satisfaction guarantee reduces risk
- Billing disputes may drag on longer
The satisfaction guarantee is Cirro’s safety valve. If something goes wrong early, you can leave penalty-free. Green Mountain doesn’t offer this, but their complaint rate is lower.
When Environmental Credibility Matters
Green Mountain makes sense if:
- You want your electricity company to be a green company, not just a company that sells green electricity
- Direct wind/solar farm contracts matter more than REC offsets
- You’ll call customer service and ask about sourcing specifics
- 27 years of environmental focus signals legitimacy
- The premium price is worth authentic environmental commitment
Cirro makes sense if:
- Green energy is a checkbox, not an identity
- You want renewable electricity at the best price available
- The 30-day guarantee reduces switching risk
- $200-$300/year in savings matters more than sourcing story
- You care about outcomes (renewable) not means (direct contracts)
The Verdict
Choose Green Mountain if:
- Environmental credibility is paramount
- You want the OG Texas renewable company
- Direct sourcing matters more than offsets
- You’re willing to pay premium for authentic commitment
- The story behind your electricity matters
Choose Cirro if:
- Green energy at budget-ish prices is the goal
- The 30-day guarantee appeals to you
- You don’t need the environmental story
- $200-$300/year savings matters
- You want NRG stability without Green Mountain’s premium
The honest take: Both deliver green electricity. The difference is whether you’re paying for authentic environmental mission (Green Mountain) or budget-friendly green checkbox (Cirro). Neither is wrong—they serve different priorities.
If environmental credibility is your identity, Green Mountain is worth the premium. If green is just one factor among several, Cirro saves you money on the same NRG infrastructure.
Related Pages
Company Profiles
Related Comparisons
Best-For Categories
Company Snapshots
Cirro Energy
- Parent Company
- NRG Energy (NYSE: NRG)
- Years in Texas
- 24+
- Headquarters
- Plano, Texas
- Deposit Required
- conditional
Green Mountain Energy
- Parent Company
- NRG Energy (NYSE: NRG)
- Years in Texas
- 27+
- Headquarters
- Austin, Texas
- Deposit Required
- conditional
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— Lacy L., Texas
See Current Rates
Compare current plans from both companies.
Frequently Asked Questions
Q: When should I choose Cirro Energy over Green Mountain Energy? ▼
You want green energy included without paying Green Mountain's premium. The 30-day satisfaction guarantee reduces your switching risk. Budget matters more than environmental credibility. You'd save $200-$300/year for functionally similar green energy.
Q: When should I choose Green Mountain Energy over Cirro Energy? ▼
Environmental credibility matters--you want the 27-year pioneer. Direct wind/solar farm contracts matter more than REC offsets. You want staff who genuinely understand renewable energy. The premium price is worth authentic environmental commitment.
Q: What is the main difference between Cirro Energy and Green Mountain Energy? ▼
Cirro Energy wins on price, flexibility. Green Mountain Energy wins on environmental credibility. Both deliver identical electricity through the same wires—the difference is pricing structure, customer service, and plan options.