The Big Deal said that switching is at its second lowest level in the last decade and is lower than it was ten years ago.
There were an estimated 5.88 million switches in 2013, which is 3.7 million less that at the peak of switching in 2008, and almost 1.4 million less than in 2003.
Henry de Zoete, co-founder of the Big Deal said: “Energy UK and the big six claim that the market is working because more and more people are switching. The truth is the opposite.”
He added that the spike in switches in November and December could be explained by the “widespread” press coverage generated by the price increases announced in October.
Responding to this claim, Energy UK said: “More small and medium sized suppliers are competing than ever before.
“Their share of the market is growing as customers take advantage of the choices on offer.
“What’s more, the final quarter of 2013 saw the highest level of switching of any quarter in the last ten years with more people than ever hunting for a deal to suit them.”