Suppliers active in your state
14 energy suppliers serve Connecticut
14 compete for your electricity supply. Tap any logo for plans, rates and reviews.
Step 1 of your switch
Find your Connecticut utility
Your utility is set by your address. Eversource Energy and United Illuminating are the two big investor-owned electric utilities. A handful of towns run their own municipal utilities, where retail choice does not apply.
Investor-owned
Eversource Energy
formerly Connecticut Light & Power (CL&P)
Most of Connecticut: Hartford, Stamford, Norwalk, Danbury, Manchester, eastern CT
Investor-owned
United Illuminating
UI, an Avangrid company
Southwest CT: New Haven, Bridgeport, Milford, Stratford, Shelton, Orange
Municipal (MLP)
Norwich Public Utilities
NPU, municipal
City of Norwich
Municipal (MLP)
Wallingford Electric
town-owned MLP
Town of Wallingford
Municipal (MLP)
Bozrah Light & Power
BL&P, municipal
Town of Bozrah
Municipal (MLP)
Groton Utilities
city-owned
City of Groton
See the full list of municipal utilities on our Connecticut utility directory. The state-run shopping portal is also available at EnergizeCT.com.
How CT customer choice works
From the meter to the supplier in 3 moves
Every Connecticut bill has two halves. Delivery is the wires line, owned by Eversource or UI, and you cannot change it. Supply is the kilowatt-hours line, where the competitive market opens up. Here is how to navigate both.
Identify your utility
Check the top of your bill or use your address. Most of Connecticut sits in Eversource Energy territory (formerly CL&P). The southwest corner, including New Haven and Bridgeport, is served by United Illuminating. A few towns run their own municipal utilities instead.
Pick your utility aboveCheck Standard Service
If you do nothing, your utility supplies you at the Standard Service rate, auctioned twice a year and regulated by PURA. The residential rate resets on 1 January and 1 July. Always benchmark against the current rate, not last winter's, because CT swings hard between auctions.
See current CT pricesSwitch or stay
Compare licensed competitive suppliers on the state-run portal or our directory. Same wires, same meter, the only thing that changes is the supply line on your bill. Stay on Standard Service if no competitive plan beats it cleanly.
Compare suppliersThree reasons CT households shop their supply
Connecticut residential rates often top 30 cents/kWh once you add supply and delivery. Same electrons, same gas, same outage line. The only thing that changes is the supply price on one line of your bill.
Soften the 6-month auction shock
Because Standard Service is procured 6 months ahead and rolled over twice a year, every January and July CT households face a fresh price. Locking a fixed-rate competitive plan can blunt the worst of those swings, especially before a winter auction.
Lock a rate for 12 to 36 months
A multi-year fixed contract removes the 1 January and 1 July surprise altogether. Useful if you remember the winter 2022 to 2023 Standard Service jump, when CT supply rates briefly doubled and bills spiked across the state.
Go beyond the default green mix
Connecticut mandates a baseline renewable share in every supply mix through its Renewable Portfolio Standard. Competitive 100 percent renewable plans push above that floor, often at parity with Standard Service when you shop at the right moment in the cycle.
Quick answers about CT energy
The most common questions Connecticut households ask before they pick up the phone.
Your utility is set by your home address, you cannot pick it. The two investor-owned electric utilities are Eversource Energy, formerly Connecticut Light & Power, which covers about 1.25 million CT customers across most of the state, and United Illuminating (UI), an Avangrid company that serves roughly 340,000 customers in the New Haven and Bridgeport metro areas. A handful of towns (Norwich, Wallingford, Bozrah, Groton and a few others) run their own municipal utilities, where retail choice does not apply.
Standard Service is the default supply price your investor-owned utility charges if you do not shop. It is procured at auction, regulated by the Public Utilities Regulatory Authority (PURA), and passed through to customers at cost with no profit margin for the utility. For residential customers, the rate is reset on 1 January and 1 July every year. Standard Service is not a fixed long-term plan, the 6-month swings can be significant, particularly heading into winter.
Sometimes yes, sometimes no. Connecticut has tightened its rules on competitive suppliers in recent years after waves of complaints about teaser rates that flipped to expensive variable plans. Always compare a fixed-rate offer to the current Standard Service rate, including any monthly fees, and read the termination clause. When the spread is real and the contract is clean, CT households can shave a meaningful percentage off the supply line. EnergizeCT.com is the state-run portal where every licensed supplier is listed.
Always your delivery utility, never your competitive supplier. Eversource Energy: 1-800-286-2000, available 24/7, or text OUT to 23129 to report an outage. United Illuminating: 1-800-722-5584. The outage line stays the same whether or not you have switched suppliers, because the wires are still owned by your utility.
Leave the building first, do not stop to call from inside. Once outside, call the gas distributor immediately. Eversource Gas of Connecticut: 1-800-286-2828. Connecticut Natural Gas (CNG): (860) 659-4000. Southern Connecticut Gas (SCG): 1-800-659-4848. Distribution emergencies are handled by the gas utility on your bill, even if your gas supplier is someone else.
CallMePower is a free, independent comparison service. We never charge consumers, and we do not tilt our Connecticut directory to favor one supplier. Our CT pages list the incumbent utilities, the municipal utilities and the competitive suppliers so households can see the full landscape before they decide.
Keep learning
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