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Energy companies advice guides

Which? energy company reviews reveal the best and worst suppliers based on feedback from their customers, plus our expert verdict on their procedures, practices around customer service and complaints and pricing.

5 articles

Green energy suppliers

Find out about different types of green energy and what you're getting when you buy electricity from different renewable energy companies

Small energy companies

Find out more about small, independent energy firms. Should you switch to a small energy company?

Best and worst energy companies

See which energy companies came top of our annual customer satisfaction survey.

Energy company reviews

We've surveyed thousands of energy customers about their provider. Find out which ones you can rely on and which offer poor customer service in our energy company reviews.

Northern Ireland electricity and gas

Find out which energy companies came top in Northern Ireland in our annual customer satisfaction survey.

7 January 2022