About Constellation
Data updated- Website
- constellation.com
- Category
- Utilities
- Location
- United States · Baltimore
- Status
- Unclaimed
- Last 12 months
- 65 reviews
- Replies to negative
- 83% (5/6)
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Is Constellation legit?
Constellation (constellation.com) has a 4.5 out of 5 rating on OK.one, based on 66 user reviews collected here. It is listed under Utilities and its reputation is excellent. 85% of reviews are 4 stars or higher and 6% are 1 star; The business has replied to 83% of negative reviews; 65 of them were added in the last 12 months. Last updated 2026-08-10.
What people say
Account number
I have no idea what my account number is or where to find it look at anything online.
Reply from Constellation2026-08-03
Hi Johnathon, We're very sorry you have not received your account information. You should have received a welcome packet from us once service started at your address. We have sent you an email requesting additional information so that our customer care team can help you with your request. Thank you.
Very good excellent
The change over to better rate was very…
The change over to better rate was very easy. Thanks.
Great choice
Great communication and customer service
Price is good
Very easy to set up the account and the…
Very easy to set up the account and the rate was the best out of all the companies! The rate is lower than UI’s off peak rate. It’s saving me $40 a month.
I am a Constellation customer for the…Last 8 Years and they have CHEATED ME
I am a Constellation customer for the last 8 years . I have renewed contracts multiple times with them . In 2024 a customer rep confiremd 13.9c all inclusive including centrepoint delivery charges. Since i had been with them for 6 years before that i never had any problems. After 2 years i looked at the bill and found the rate excessive. They had charged me 17c a KWH. It was a rude shock to me. I didnt expect anybody handling customer service on bahalf of Constellation to operate this was. I called them immediately and told them that they had something wrong. They did not refund me for the eextra charges for the last 2 years. I used approximately 15000 kwh x .05 cents a KWH =$750. I am putting this review online so people can be aware how publicly listed companies cheat customers with the help of customers service reps. Updated 7/31/26 I called next day just to confirm Constellation had not lied to me yesterday. I called your customer service reps yesterday Mauricio Ext 815 And Frank Phillips ext 898 . They confirmed a change to an 11 month plan which would take effect within 24 hours and today I called just now. They deny that my call has a record and they say they will change the plan from the 17th of August. So customer service reps are lying on a daily basis. I asked the rep today to speak with those customer service reps from yesterday and they said they could not be reached . It is truly appalling to communicate with Constellation. Constant lies. New lies everyday.
Reply from Constellation2026-07-31
Hi Sam, We are very sorry to hear about your experience. We received your Facebook message and have sent you some follow-up questions so that we can escalate this to our customer care managers. We appreciate your feedback and look forward to your response in order to help you further. Thank you.
so far so good
so far so good, havent received a bill yet to really see. but the price is right and i hope after the contract is up both sides are satisfied going ahead. The agent was very helpful
The rates are saving us a few dollars…
The rates are saving us a few dollars each month, which us great.
Great price
I’ve had Constellation in the past and had no problems at all. I decided to return as they have the best prices. The only problem I’ve had is signing up. It was frustrating as it never showed confirmation that my application was submitted. I tried finding out by texting help center but they couldn’t tell either. So I went through the whole application again.
Reply from Constellation2026-07-27
Hi Brenda, We are so sorry to hear about the issue you experienced. We have sent you an email requesting some additional information. If you could please respond, we can have our customer care team make sure there are no other issues with your account. Again, our apologies. We appreciate you choosing Constellation!
Good supplier Great customer service
Good supplier Great customer service. Very competitive pricing
Easy to use paperwork.
Customer care helped me get my account…
Customer care helped me get my account fixed. Very professional and polite.
I had spent 50 years with Centerpoint…
I had spent 50 years with Centerpoint and Reliant to be treated the way I was since last fall is unforgivable. My daughter has your company supplying power and I’m glad I’m connected to constellation.
Reply from Constellation2026-07-21
Hi Paul, We're sorry to hear that, but happy that your daughter is a Constellation customer and recommended us to you! If you ever have any questions or issues, please don't hesitate to reach out to us at: https://www.constellation.com/about-us/contact-us.html or through our Facebook page: https://www.facebook.com/ConstellationEnergy/. We appreciate you choosing Constellation!
Outstanding company
Very easy switch done extremely fast and great cents per kilowatt
Easy to switch and I’m saving money
Price for the time being
You just fine
Reply from Constellation2026-07-22
Hi Fred, We appreciate you taking the time to leave us a review. If you have any additional feedback on what we could do better to better reflect the score you gave us, we’d be grateful to hear it. We’re always looking for ways to improve our products and services, and we hope to earn a 5-star review from you in the future. Thank you.
Easy to switch to
Easy to switch to, great service, excellent price