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Energy suppliers

With many energy suppliers currently active in the UK, it can be hard to know who's who. We've rounded up reviews and company information about gas and electricity suppliers of all sizes.

UK energy statistics show that British Gas remains the biggest energy supplier in the UK with 20% of the overall market share, but there are plenty of other alternatives on the market.

ScottishPower is one of the big six UK energy suppliers, responsible for supplying gas and electricity in the UK to more than five million customers...

OVO Energy is one of the newer “big six” energy suppliers, having risen rapidly to provide energy to millions of customers across the UK.

One of the most popular and innovative energy suppliers in the UK, Octopus Energy entered the UK energy market in 2016, using technology to create a leaner business from the ground up and ensure future room to grow.

E.ON Next is part of the E.ON group, focusing on providing renewable energy to customers across the UK.

Find out about EDF - one of the UK's big six energy suppliers and a significant producer of low-carbon electricity - here.

Compare market-leading British Gas energy deals and get more information about the UK's oldest energy supplier here.

Find out about prepayment supplier E (sometimes called E (Gas and Electricity)) here.

Fuse Energy is an electricity-only supplier that focuses on providing 100% renewable energy to UK customers. Find out more about it here.

Co-op Energy is part of the Midcounties Co-operative and is partnered with Octopus Energy. The partnership brings together two companies that aim to offer fair pricing, simplicity and excellent customer service.

Utilita is the leading supplier of prepayment energy in Great Britain using smart meters.

Good Energy was founded in 1999 with an aim of enabling homes and businesses to be part of a sustainable solution to climate change.

100Green (formerly Green Energy UK) sources its energy from UK-only renewable sources, excluding nuclear power.

Ecotricity is a renewable electricity and gas supplier, founded by Dale Vince and based in Stroud in Gloucestershire.

Based in Leicester, Outfox The Market launched in September 2017 and is one of the more prominent small energy suppliers operating throughout the UK.

Utility Warehouse offers a way for energy, mobile, broadband and home phone consumers to bundle their services together into one utility bill.

So Energy is a small energy supplier offering green energy plans to households in the UK. All of the electricity supplied by So Energy is from renewable sources.

Sainsbury's Energy is a small supplier offering gas and electricity tariffs backed by a big six supplier.

Ben Gallizzi author headshot
Written by Ben Gallizzi, Senior Content Editor
Updated on 28 February 2025