Constellation Reviews

formerly MXEnergy

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About Constellation

This profile has not been claimed by the company. See reviews below to learn more or submit your own review.

Constellation provides energy solutions, specializing in electricity and natural gas. The company offers supply and management services for residential, commercial and industrial clients. Constellation also incorporates renewable energy sources and innovative energy efficiency programs.

Pros
  • Significant cost savings reported
  • Reliable service during outages
Cons
  • Frequent billing discrepancies
  • Poor customer service in some cases

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Constellation Reviews

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    How do I know I can trust these reviews about MXEnergy?
    • 4,789,373 reviews on ConsumerAffairs are verified.
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    • We use intelligent software that helps us maintain the integrity of reviews.
    • Our moderators read all reviews to verify quality and helpfulness.
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    Coverage

    Reviewed Nov. 12, 2025

    During the hottest and sunny part of summer, they claim to be down from August 2 to November 3, for technical problems. This is BS and they should cover the 15% reduction promised. I hope the Illinois Attorney General looks into these shady practices.

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    Sales & MarketingPriceRates

    Reviewed Oct. 2, 2025

    Be cautious when browsing this company online because they have faulty advertisements. This company may advertise one price but charge a significantly different amount once you complete your order. It is advisable to verify the prices before making a purchase..

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      Customer ServiceSales & MarketingBillingHonesty & Transparency

      Reviewed Sept. 6, 2025

      Didn’t think choosing a gas company would ever matter but I cannot in good conscience ever recommend or sign up with constellation ever again. Misleading bait and switch plans, which they were sued for apparently. $220 over 5 months and turned my gas on one time. $150 cancellation fee on top of that because they just use ai bots for customer service so getting your bill fixed ain’t happening. Ridiculous phone operators that can’t figure out how to contact their field tech people. Just a trash company that shouldn’t even be in business, they’re just lucky they got grandfathered into the industry would be my guess.

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      Customer ServiceContract & TermsPrice

      Reviewed July 10, 2025

      Long term customer with 800 credit score. They know who I am. Tried 3 times to submit ID Check online info to get service at another location. Failed each time since ID Check doesn't work. Cost me money, needed power on ASAP. It was never a problem before: call, confirm it's me, get service that day. Will never use them again.

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      Customer ServiceCoverageTechPriceBillingRatesHonesty & Transparency

      Reviewed May 23, 2025

      Every bill was much higher than expected from the beginning. On top of that Constellation Energy uses misleading marketing of home warranty services to get you to enroll for electric service paying higher than average per Kilowatt charges. Then will find every excuse not to honor warranty and cover repairs. Instead they will use opportunity when you need a repair to try to push for high cost of extra unnecessary repairs using their preferred vendors. AC repair guy who came out even said Constellation sets repair prices and collects a large part of proceeds. Would certainly recommend to stay clear of this company. Especially since there are so many ethical companies to choose from.

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      Customer ServicePriceBilling

      Reviewed April 24, 2025

      We were signed up for Constellation by an unknown entity for our condo building - once we realized (once someone actually looked at our bill) we saw that on a $965 bill - they tacked on $1500 in delivery charges. I called, found out that someone signed us up. They would not tell me who did it - but they gave me a phone number that was unrelated to anyone in our association. I called three times and finally told someone to cancel the account. Then they said it would take another "one to two" billing cycles to close out the account. A total racket!

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      Customer Service

      Reviewed Feb. 22, 2025

      Like many, have notified Constellation by phone and writing but somehow I keep getting navigated back as a customer. There are countless others and am discussing with two legal firms regarding a class action legal suit against them and maybe our local city as well.

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      Customer ServiceTechSales & MarketingPunctuality & SpeedBilling

      Reviewed Feb. 11, 2025

      Company is a scam. They constantly calls and stops in my business and harass you to sign up with them. They sent me a bill for "early termination" and the letter that was sent with it says my contract expired 4 months ago.. Makes no sense!

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      Refunds & PayoutsBilling

      Reviewed Feb. 8, 2025

      Unbelievably deceitful company. My last month bill was more than double what I pay for and it was in the middle of winter. That kept saying I went to variable the last month. Why was not this company filed a class action lawsuit and put the CEP behind bars.

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      Price

      Reviewed Jan. 10, 2025

      Constellation has a very poor cancellation policy. Fees are extremely too high. I will never deal with them again. A charge of $150.00 was added to cancel my service. I guess they don't wish to please customers.

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      MXEnergy author review by Jonathan Trout

      Constellation is an independent energy supplier for Illinois and throughout the United States. It offers residential customers, small business owners, commercial and industrial companies and government agencies electricity, gas and solar solutions. It serves 2.5 million customers, including two-thirds of Fortune 100 companies, and gives back to communities across the nation.

      • Residential services: Constellation offers multiple fixed-rate plans to fit your budget. You can choose the term of contract, and your monthly electricity bill will be the same throughout the length of your contract.

      • Renewable electricity plans: Depending on the state you live in, a percentage of the electricity your home uses can be generated from wind energy sources. Constellation uses wind farms and wind turbines in certain states to provide clean energy sources where laws and regulations allow.

      • Solar power: If you’re thinking about switching to solar energy, Constellation partners with Sunrun to help you outfit your house with a solar system. Sunrun offers flexible payment plans, including a zero down plan and a prepaid plan. The prepaid plan allows you to buy 20 years of power up front at the best price Sunrun offers. Constellation and Sunrun currently provide solar power in six states to residents who spend over $100 per month on their energy bill.

      • Small business options: Constellation provides small businesses with custom energy plans and will help you find the right plan for your business. It understands running a small business comes with unique budget challenges and can make the difference in the size of your profit margin. If you’re a small business owner, you can contact a customer care representative to determine which energy resource works best for your company.

      • Payment options: Constellation gives you multiple payment options to choose from. You can do a one-time payment option via direct withdrawal, check or credit card. You can choose a monthly recurring payment using a credit card or you can pay by phone. You can also set up an online account to receive paperless statements and manage your billing cycles.

      by Jonathan Trout ConsumerAffairs Research Team

      As a member of the ConsumerAffairs Research Team, Jonathan Trout believes having access to free, comprehensive information on products and businesses is vital to making smart purchasing decisions. He focuses his efforts on researching and reviewing multiple brands across a variety of industries, with the goal of writing unbiased buyers guides to help inform consumers on impending purchases.

      Constellation (formerly MXEnergy) Company Information

      Company Name:
      MXEnergy
      Website:
      www.constellation.com