Reviews for Constellation

Updated: September 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.

Constellation logo
CT Energy Ratings's Gold Tier Providers are the best of the best in Connecticut electric. These are the best providers over the past year at providing customers and communities great service, stellar customer service, and top of the line resources, just to name a few things. When you select one of these providers, know you're choosing from among the best options in the Connecticut electric market.


Review from Bob B

Priceing
I have what i thought was a good relationship with this company everyone ive ever dealt with was upfront honest and true to their word. My issue is i thought i did well when i signed up for a 3 year fixed rate price per kilowatt hour @ 9.99 now im reading and see it is 7.69ish? i no i have a contract but one would think to keep a customer and remain honest they could have at least contacted me to see if i am interested to extend my contract at this price for and extended 3 years. I realize i have a contract and it is what it is but my thinking if you wish to keep a customer and keep an honesty repot going any company would give it a thought to put their customers 1st. Also i wish to let anyone and everyone who sees this i only wrote this publicly as i couldnt find any other waty to contact on this page... its possible their is another way in front of my face so sorry if their is i mean no dissing to this company as i said they have all been very good dealing with me and i never found any big issues against them. Lastly they were a company who introduced themselves to me and left me alone to make a choice without calling or emailing me to the point that id want nothing to do wth them they left me to make a choice without feeling forced.
Plans & Pricing
Order Experience
Customer Service
Account Management
Likely to recommend

— Bob B from Ansonia, CT on May 23rd, 2020


Most Recent 5 Star Reviews

11 Customer Reviews Written Overall


Read All 5 Star Reviews

Plans & Pricing
Order Experience
Customer Service
Account Management
Likely to recommend
Least expensive rate
Easy and transparent
Plans & Pricing
Order Experience
Customer Service
Account Management
Likely to recommend

— Cheapest Rate from Canton, CT on May 25th, 2026
Good Choice
Company seems sincere about their customer service and wanting to save a member money
Plans & Pricing
Order Experience
Customer Service
Account Management
Likely to recommend

— William G from Milford, CT on March 6th, 2026
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



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