[10] Just Energy supplies natural gas and/or electricity in Alberta, British Columbia, Manitoba, Ontario, Quebec, and Saskatchewan in Canada; California, Delaware, Illinois, Indiana, Maryland, Massachusetts, Michigan, New Jersey, New York, Ohio, Pennsylvania, and Texas in the United States.

In August 2011, Just Energy announced a deal to acquire Fulcrum Retail Holdings LLC, a privately held electricity provider operating in Texas.

[13] Former Enron executives James Lewis and Deborah Merril led Just Energy as Co-CEOs from 2014 to 2018 [14] San Francisco's KPIX-TV news reported in June 2013 that there had been tens of thousands of complaints across the U.S. from consumers saying they were misled into signing up with Just Energy, and instead of saving money on their monthly bills as advertised, the cost went up.

The complaints led to a consumer fraud lawsuit filed by the state of Illinois, and investigations in New York, Ohio, and Canada.

[26] In November 2014, the Canadian Federal Competition Bureau says a subsidiary (National Energy Corp, which operates as National Home Services) of Just Energy Group Inc. has agreed to pay $7 million in penalties, restitution and other costs related to complaints over its door-to-door water heater marketing practices in Ontario and Quebec.

[27] In January 2015, the Attorney General's Office of Massachusetts announced that Just Energy had agreed to pay $4 million to settle allegations of deceptive marketing and overcharging consumers.

According to the settlement, Just Energy charged rates that were higher than the rates for the electricity supply provided by NSTAR and National Grid, and induced elderly and non-native English speakers by continuing to offer electricity supply services even after it became clear that they did not understand the terms of the contract.

[28][29] A class action brought against the Just Energy group in May 2015 claimed it unlawfully denied the minimum protections of Ontario's Employment Standards Act to its door-to-door sales agents by miscategorizing them as independent contractors instead of employees.

[31] In March 2021, after the Texas power crisis caused crushing losses, the company sought court protection and bankruptcy.