Green Mountain Energy

Best for Green Energy 100% Green

America's longest-serving 100% renewable energy retailer since 1997

4.3/5 (7,200 reviews)

Founded 1997

13.2¢

NRG Energy

PUCT #10028

29+ Years

Austin, TX

Updated 2025-12-29

Available Plans

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Overview

13.2¢

Avg Rate

4.3/5

Rating

0-12 mo.

Terms

100%

Green

Plan Types: Fixed Variable 100% Green Solar Buyback

Pros & Cons

Strengths

100% renewable energy since 1997 - longest track record in America
Genuine environmental commitment (not just marketing)
Austin-based company with Texas roots
Month-to-month option for maximum flexibility
Carbon offset programs for car, flights, home
NRG backing provides financial stability

Watch Out For

Rates typically 10-15% higher than Gexa for same 100% renewable energy
Early termination fee ranges from $99-199 depending on plan length
Customer service not available 24/7 (weekday hours only)

About Green Mountain

Green Mountain Energy launched in 1997—before Texas even deregulated its electricity market. They've been selling 100% renewable energy longer than any other American retailer. When Texas opened to competition in 2002, Green Mountain was ready with established wind farm contracts. NRG Energy acquired them in 2010, providing Fortune 500 financial backing. But Green Mountain has maintained its Austin headquarters and environmental mission. They're not just buying renewable energy credits—they have long-term contracts with actual wind and solar farms. Their rates run slightly higher than Gexa (another 100% renewable option). The premium reflects their 28-year track record and the brand's genuine environmental commitment. For customers who want the "original" green energy provider, Green Mountain delivers.

Plans & Pricing

Green Mountain offers simple, straightforward plans: Fixed Rate (Pollution Free 12/24): Lock in your rate for 1-2 years. 100% renewable included. Month-to-Month (Pollution Free Variable): No contract, cancel anytime. Higher rate but maximum flexibility. Great if you're renting or might move. All plans are 100% renewable. No need to choose a "green" version—it's all green.

Rate Analysis

Green Mountain's rates typically run 11¢ to 15¢ per kWh—about 10-15% higher than Gexa but competitive with TXU and Reliant. Why pay more than Gexa? You're paying for: - 28-year track record (vs Gexa's 23) - Austin-based company culture - Additional carbon offset programs - The "original" green energy brand Is it worth the premium? That's subjective. If lowest rate matters most, Gexa wins. If you value Green Mountain's longer history and mission-driven culture, the premium may be worth it.

Customer Feedback

What Customers Like

"Green Mountain was doing renewable before anyone else. 10 years as a customer and I appreciate knowing my electricity is genuinely clean."

Google Reviews

"The month-to-month plan was perfect when I was renting. No penalty to switch when I bought a house."

Google Reviews

Common Concerns

"Love the company but realized Gexa offers the same 100% renewable at better rates. Switched after 5 years to save money."

Google Reviews

"Early termination fee was $150 when I had to move mid-contract. Wish they had more flexibility."

BBB

Frequently Asked Questions

Is Green Mountain Energy really 100% renewable?

Yes. Green Mountain has been providing 100% renewable electricity since 1997, longer than any other American retailer. They have long-term contracts with wind and solar farms—this isn't just buying renewable energy credits, they're actually sourcing power from clean energy generators.

Source: Google PAA

Is Green Mountain more expensive than other providers?

Green Mountain rates are typically 10-15% higher than Gexa Energy (another 100% renewable option) but competitive with TXU and Reliant. You're paying a premium for their 28-year track record and authentic environmental mission.

Source: Google PAA