Updated: June 2026
The best review categories for Constellation are the order experience, with an average of 4.2 stars, and their plans and pricing, with an average of 4.1 stars.
Recent Good Review from Louis Gioia J
Constellation Energy
| Easy to enroll, they provide good and timely information and my energy expense has decreased quite a bit. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Louis Gioia J
from
Stamford, CT
on
May 7th, 2025
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
Constellation Energy
| Easy to enroll, they provide good and timely information and my energy expense has decreased quite a bit. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Louis Gioia J
from
Stamford, CT
on
May 7th, 2025
Very Professional
| I was helped to find the best rate and after an interview and my acceptance, I got a letter in the mail confirming my agreement. First rate service. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Jackie
from
Hamden, CT
on
April 26th, 2025
Wonderful service and great promotions
| Constellation always has good rates. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Chris
from
Danbury, CT
on
April 14th, 2025
Owner
| Great service from start to finish and amazing price. Thank you. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Liz
from
Cos Cob, CT
on
March 17th, 2025
Review
| Easy to telephone to get your service | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Valerie
from
North Haven, CT
on
September 12th, 2024
So far so good!
| Good price and no surprises. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Tom M.
from
Bristol, CT
on
September 9th, 2024
Good Deal!!
| Although we did not need any customer service, signing up was quick and easy and the rate excellent. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Sandy
from
Madison, CT
on
March 17th, 2024
Great
| Great | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Great
from
Bridgeport, CT
on
November 1st, 2023
Pleasant Transition
| The switch to Constellation for our electric supplier went very smoothly. The representative was knowledgeable, courteous & friendly. The best part is that we will be saving money! | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Linda
from
Wilton, CT
on
October 19th, 2023
MR Goodwrench
| It was ok | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Ken
from
Clinton, CT
on
September 20th, 2023
Great service
| Electric bill was cut by 30%. Very pleased with Constellation! | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Slash Electricity Rates!
from
Newington, CT
on
August 21st, 2023
Most Recent 4 Star Reviews
6 Customer Reviews Written Overall
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
Great Company
| We are very pleased with Constellation. They are great to work with and have a great rate | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Kevin R
from
Brookfield, CT
on
April 4th, 2025
Cheaper by the Kv
| Easy to apply and follow through. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Michael Kelting
from
Enfield, CT
on
March 29th, 2025
Bill savings
| When I signed up for this it was supposed to be 1 year now I see its only 6 months. I guess I'll have to reup in June | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Bill Savings
from
Cheshire, CT
on
March 23rd, 2025
Jim albrycht
| Good choice | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Good
from
Bristol, CT
on
March 21st, 2025
DEALING WITH CONSTELLATION
| ABSOLUTELY NO PROBLEM AT ALL. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
BOB H
from
Brookfield, CT
on
July 30th, 2024
Shopping for energy supplier
| On my latest search for the best energy price available Constellation was the best deal. Easy sign up experience. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Tom
from
Newtown, CT
on
December 15th, 2023
Most Recent 3 Star Reviews
1 Customer Reviews Written Overall
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
Save money
| Easy to apply | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Alan Hunt
from
Danielson, CT
on
September 22nd, 2024
Most Recent 1 Star Reviews
4 Customer Reviews Written Overall
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
Too expensive
| Too expensive am changing to a more affordable company | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Expensive After Trial
from
Andover, CT
on
September 21st, 2025
Yet to receive a bill
| Yet to receive a bill. Had trouble switching as I had two residences on my Eversource bill and that seemed to be an issue yr people could not solve. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
David Whitty
from
East Hampton, CT
on
September 16th, 2024
Do NOT do it! They are HORRIBLE!
| They will drop you as a customer, after signing a contract, without even telling you. THANKFULLY, I needed a copy of a bill for a new resident form so I was locating my account information to set up an online account and I just happened to find out Im not longer a customer. I should have gotten an email is inaccurate, and had I not called, I wouldve have been late on my new company (who they shared my info with unknowingly) first bill which was due the next day. Over all, dont go with them. Sure the rates look better, but customer service is absolutely horrible and they dont care about respecting their customers. 0 reason to discontinue our new contract one month into owning our new home. | |||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
Abigail C
from
East Hampton, CT
on
March 29th, 2024
Urgent- please contact me
|
Applied months ago and is still not active.
Sent request to customer service and no response! |
|||
| Plans & Pricing | |
| Order Experience | |
| Customer Service | |
| Account Management | |
| Likely to recommend |
—
LuAnn
from
New Milford, CT
on
November 27th, 2023
Connecticut Energy News:
New CT Solar Energy Bill Speeds Up Permitting But Adds Caps
Eversource and UI Rates to Fall July 1, But New Rate Case Just Filed
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Lamont Pitches Energy Rebates to Help CT Customers
Eversource Wants You to Pay For Its $1.5 Billion Storm Costs
Shop Cheap Plans Now to Beat Jan. 1 Rate Hikes!
Lock in Best Electricity Savings Now Before Winter
Grab Deals on 12 Month Electric Plans in West Haven
Four Cheap Electric Plans That Beat UI Rates
Eversource and UI Rates to Fall July 1, But New Rate Case Just Filed
Shopping CTEnergyratings Saves You More
PURA OKs UI $68M Revenue; Customers May See Rate Hike
Lamont Pitches Energy Rebates to Help CT Customers
Eversource Wants You to Pay For Its $1.5 Billion Storm Costs
Shop Cheap Plans Now to Beat Jan. 1 Rate Hikes!
Lock in Best Electricity Savings Now Before Winter
Grab Deals on 12 Month Electric Plans in West Haven
Four Cheap Electric Plans That Beat UI Rates
CT Energy Ratings Resources:
Your Consumer Rights
United Illuminating FAQ
Understanding Your United Illuminating Bill
How to understand Your Eversource Bill
Types of Energy Contracts
CT Energy Provider Switching Rules
How We Score Providers
High Bill? Here's what you can do
Why Use CT Energy Ratings
How to Switch Connecticut Electricity Companies
Connecticut Energy Choice
Connecticut Electricity Cancelation Charges
10 Quick Energy Saving Tips
Eversource Energy FAQ
Connecticut Energy Deregulation History
United Illuminating FAQ
Understanding Your United Illuminating Bill
How to understand Your Eversource Bill
Types of Energy Contracts
CT Energy Provider Switching Rules
How We Score Providers
High Bill? Here's what you can do
Why Use CT Energy Ratings
How to Switch Connecticut Electricity Companies
Connecticut Energy Choice
Connecticut Electricity Cancelation Charges
10 Quick Energy Saving Tips
Eversource Energy FAQ
Connecticut Energy Deregulation History