thomas
honest
good pricing

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Constellation (constellation.com) has 362 customer reviews on Five Star Index, with an average rating of 4.2 out of 5.
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thomas
good pricing
Keith K.
Keeping prices down.
Jeffrey
Cost prices are competitive and hanging was seemless.
J R.
great customer service - rep gave lower rate before processing my change
Donna C.
Price is a little higher than I want, but the length of the service was what made me switch back to Constellation.
Thomas
Detail accuracy
Dana
We were former customers of Constellation and had no issues signing up. We went back to Eversource for a while, but since Constellation's rates were lower, we attempted to sign up again. The process this time was HORRIBLE. I would speak to a rep who said everything was all set, then I would get a call that there were issues and have to go through the process again. This happened four times, and no one had a record of the previous conversations. We are very turned off by the lack of organization and communication with Constellation. We hope moving forward, we don't have any issues. My kids and in-laws used to be customers too, but we told them not to switch. Not worth the hassle.
Response from ConstellationApr 15, 2026
Hi Dana, We are very sorry to hear about your experience. We certainly do not want that to happen to any of our customers – current, previous, or returning. We have sent you an email to the address associated with this review. If you could please respond to that with the requested information, we can escalate this to our Care managers for further review. We appreciate your feedback and apologize again. Thank you.
MAB
When I called Constellation customer service to inquire if I would be able to get their new, lower rate since I had just signed up for their service less than a month before, the gentleman was very pleasant and helpful. They did give me the lowest rate and I was both pleased and grateful. 🐦💗