Energy companies

Which? energy company reviews reveal the best and worst suppliers based on feedback from their customers, plus our expert verdict on their policies and pricing.

Best and worst energy companies
by Sarah Ingrams
Which? reveals the best and worst energy firms as voted by thousands of their customers. See energy company reviews, including British Gas, EDF Energy, Eon, Npower, Ovo Energy and Utility Warehouse. Find the best energy company for you.
Energy company reviews
by Sarah Ingrams
Everything you need to know about your energy supplier in one place. Compare gas and electricity companies on prices and value for money. Find out what customers think of them - our exclusive survey results reveal all.
Small energy companies
by Sarah Ingrams
The pros and cons of choosing a small energy firm - should you switch? From tariffs that track wholesale prices, to renewable energy and digital-first customer service, find out what small gas and electricity suppliers offer.

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Northern Ireland electricity and gas
The best and worst Northern Ireland gas and electricity companies revealed. Exclusive Which? research reveals what customers really think of Power NI, SSE Airtricity, Firmus Energy, Electric Ireland, Click Energy and Budget Energy

Energy companies

Best and worst energy companies

Energy company reviews

Small energy companies

Put us to the test

Northern Ireland electricity and gas