We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies as per our policy which also explains how to change your preferences.

Other energy companies reviews

GB Energy

By Sarah Ingrams

Article 11 of 25

Put us to the test

Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

GB Energy

GB Energy Supply went bust in 2016 and is now part of Co-operative Energy, which operates the GB Energy brand.

GB Energy Supply has been part of Co-operative Energy since 2016. It currently supplies gas and electricity to around 140,000 homes across Great Britain.

It says it wants to help customers save money on energy and keeps costs down by using efficient online systems and not spending money on advertising.

GB Energy Supply was established in 2014 and by 2015 its tariff was among the cheapest on the market. But just a year later, it stopped trading. At the time, it said its business was ‘untenable’ and blamed ‘swift and significant increases in energy prices over recent months’ for its failure. Plus its inability, as a small energy company, to bulk-buy energy in advance in order to ‘access the best possible wholesale prices’.

GB Energy Supply’s customers were transferred automatically to Co-operative Energy, which has continued to operate the GB Energy brand.

Find out if GB Energy Supply still offers cheap energy deals. Use Which? Switch to compare gas and electricity prices.

GB Energy customer score

GB Energy Supply came joint 17th out of 31 energy companies in our most recent annual Which? energy customer survey of 8,761 member of the public.

‘Good prices with good service’

GB Energy customer

GB Energy score breakdown

The graphic below shows the breakdown of GB Energy’s scores from our survey.

Scroll down to read the full Which? verdict on GB Energy Supply.

Find out how GB Energy compared with other energy companies in our guide to the best and worst energy companies.

Which? verdict on GB Energy Supply

Its customer score is above average (55%) and one percentage point higher than its supply partner, Co-operative Energy. But, compared with some other small energy firms, there’s plenty of room for improvement.

Although we only received enough customer responses in two areas to give star ratings, GB Energy’s customers rated it excellent in both.

Its bills are very accurate and clear, according to customers.

Customers also rated it excellent value for money. It does still offer some very cheap deals.

GB Energy customer service

On customer service, one customer told us: ‘I haven’t had any problems with the company and when I have enquired about something I’ve always had very good customer service.’  

But another said it was ‘difficult to contact when it went bust’.

Pros: Offers cheap deals, customers rate it excellent value for money

Cons: Some customers have found it difficult to contact

GB Energy Supply electricity sources

GB Energy in the news


July: GB Energy Supply announced it’ll increase the price of its variable tariff, GB Green Pioneer, by 5% on 20 August. Customers will pay £30 more, on average, per year as a result.

Don’t pay your energy firm more than you have to. Which? Switch will help you track down the cheapest energy prices.