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The 'Big Six Energy Companies' are Britain's largest energy suppliers - between them they supply gas and electricity to over 50 million homes and businesses in the UK. The Big Six are also the oldest energy companies, having been created with the privatisation of the energy sector in 1990. However, since 1997 many smaller independent suppliers have entered the UK market, with the aim of providing real competition for the Big Six, and creating a fairer market for consumers in the process.

UKPower.co.uk compare all suppliers for the home energy market, so you can be sure you'll find the best price through our service.

The Big Six Energy Suppliers

British Gas British Gas
  • Leading Big Six energy supplier in the UK.
  • British Gas is owned by parent company Centrica.
  • British Gas supply 15 million homes in the UK.
E.ON E.ON
  • UK market leader is producing combined heat and power.
  • E.ON is the world's largest investor owned utility service.
  • E.ON serves over 26 million customers.
EDF Energy EDF Energy
  • Largest producer of electricity in the UK.
  • EDF Energy is a French state owned company.
  • EDF Energy supplied 5.6 million homes in the UK.
npower npower
  • Npower is owned by German company RWE.
  • Previously npower was known as Innogy.
  • Npower supply gas and electricity to 6.5 million customers in the UK.
ScottishPower ScottishPower
  • Scottish Power is owned by Spanish parent company Iberdrola.
  • One of the smaller of the Big Six energy companies.
  • Scottish Power serve 5.3 million customers in the UK.
SSE SSE
  • SSE trade under different names, including SSE, SWALEC and Scottish Hydro depending on the region.
  • SSE is the second largest Big Six supplier in the UK.
  • SSE supply 9.1 million customers in the UK.

Other Energy Suppliers

Affect Energy Affect Energy
  • A team of ex-employees who used to work for one of the Big Six.
  • Over 50-years' combined experience in the energy market.
  • Affect energy pride themselves on their level of customer service.
Angelic Energy Angelic Energy
  • Robin Hood Energy is a not-for-profit supplier.
  • Boast a UK-based call centre.
  • Look to provide energy at the lowest price possible.
Avro Energy Avro Energy
  • Avro Energy began trading in 2015.
  • They look to provide simple and competitively prices energy products.
  • Avro Energy is based in Nuneaton, Warwickshire.
better energy better energy
  • Better Energy began supplying energy to customers in 2011.
  • Better Energy currently only offers gas to customers.
  • Better Energy's motto is "Same energy, Better price".
Brighter World Energy Brighter World Energy
  • Brighter World Energy began trading in 2016.
  • Every 2,000 customers who switch means they build a sustainable solar powered micro grid in a village in Africa.
  • Works in partnership with not-for-profit supplier Robin Hood Energy.
Bristol Energy Bristol Energy
  • Bristol Energy committed to local development and reinvestment.
  • They pride themselves on a transparent service.
  • Bristol Energy supply around 10,000 customers in Britain.
Bulb Energy Bulb Energy
  • Bulb specialise in renewable energy products.
  • They look to take on the Big Six by empowering their customers.
  • Bulb Energy supports independent renewable generators.
Co-operative Energy Co-operative Energy
  • Only UK supplier to be owned by their customers.
  • Coop Energy has been operating since 2010.
  • Coop Energy boast a fair and transparent service.
Daligas Daligas
  • Only offer gas to their customers.
  • Helps SMEs with a simplified pricing structure.
  • Boast a transparent and trustworthy service.
EBICo EBICo
  • EBICo was founded in 2008.
  • One of the few suppliers who offer zero standing charge tariffs.
  • EBICo also offer competitive pay-as-you-go tariffs.
Economy Energy Economy Energy
  • Economy Energy fight to keep their customer's bills falling.
  • Over 5% of their energy is generated from renewable sources.
  • Boast a service that has local communities at its heart.
Ecotricity Ecotricity
  • Ecotricity are always looking for new ways to invest in green energy sources.
  • Ecotricity regularly feature amongst the top of Which's satisfaction survey.
  • Ecotiricty is not-for-dividend, which means their customers always come first.
EnergySW EnergySW
  • Energy SW work alongside OVO to offer improved levels of customer service.
  • Offer competitive pricing.
  • Offer per-payment meters for landlords to help residents enjoy savings as well.
Engie Engie
  • ENGIE look to push boundaries in low carbon energy solutions.
  • They offer data led energy products to help customers save money.
  • Serve more than 14,000 customers in both public and private sectors.
Entice Energy Entice Energy
  • Entice Energy offers low cost gas to homes all over the UK.
  • Their service boasts a state of the art online account service.
  • Each customer has access to an account manager.
Extra Energy Extra Energy
  • Extra Energy is the sister company of German company extraenergie.
  • Considered a main challenger to the Big Six.
  • Aim to offer low prices with excellent service standards.
Fairerpower Fairerpower
  • Provides competitive energy prices to residents of Cheshire East.
  • Run by Cheshire East Council, who have partnered with OVO.
  • Payments will be collected by OVO on behalf of Fairerpower.
first:utility first:utility
  • First:utility is the fastest growing energy supplier in the UK.
  • They are committed to helping reduce energy bills by offering cheaper tariffs.
  • As a supplier they campaign for positive changes, including faster switching.
Flow Energy Flow Energy
  • Flow Energy employ market leaders to deliver the best prices for customers.
  • Their UK-based customer service team can offer support every step of the way.
  • Pioneers of the electricity-generating Flow boiler.
Future Energy Future Energy
  • Future Energy can boast low prices as well as transparent billing.
  • Based in Newcastle and prodominently supplies the North East of England.
  • Offer both gas and electricity products as part of their service.
GnERGY GnERGY
  • GnERGY is a new breed of community suppliers.
  • They aim to offer gas and electricity in an open and honest way.
  • They boast a multi lingual UK-based call center.
Go Effortless Energy Go Effortless Energy
  • Go Effortless Energy is built from the ground-up using customer perspective.
  • They offer one honest simple and fair tariff to all their customers.
  • They steer clear of misleading lyalty bonuses and cash-back schemes.
Good Energy Good Energy
  • Good Energy offers renewable energy products.
  • Founded in 1999, they were the first supplier to have a 100% renewable energy fuel mix.
  • Good Energy has an expanding community of generators across the UK.
Green Energy (UK) Green Energy (UK)
  • Green Energy can supply domestic and business customers.
  • They buy energy from anyone generating their own surplus electricity.
  • They also offer lower cost products by harnessing the power of water, wind and sun.
Green Star Energy Green Star Energy
  • Offer gas and electricity to customers across the UK.
  • Part of the larger American group Just Energy.
  • They state their aim as a company looking to develop cost effective energy solutions for their customers.
Iresa Energy Iresa Energy
  • Iresa is an independent energy supplier based it Nottingham.
  • They focus their business model around three things: price, billing and quality of service.
  • They look to use technology to bring down operational costs, the savings of which are passed on to customers.
isupplyenergy isupplyenergy
  • iSupply is based in Bournemouth and launched in 2012.
  • Their mission is to provide low pricing and easy access to an online management account.
  • iSupply prioritise price and service for their customers.
M&S Energy M&S Energy
  • Work in partnership with SSE.
  • M&S Energy prides itself in offering straightforward energy options to customers.
  • Unavailable in the Channel Islands, Isle of Man, Ireland and Northern Ireland.
Octopus Octopus
  • Octopus is the largest investor in solar farms.
  • Octopus offers a better experience for customers through transparency, honesty and simplicity.
  • Puts the planet first with long term investment in low CO2 alternatives.
Peterborough Energy Peterborough Energy
  • Offers local residents to Peterborough fair and competitive prices.
  • In partnership with OVO.
  • OVO will collect payments on Peterborough Energy's behalf.
PFP Energy PFP Energy
  • PFP Energy offers simple tariffs and bills, so you know exactly what you're getting.
  • Offer discounts for online accounts and direct debits.
  • Owned by the PFP Group, PFP Energy launched in 2015.
Robin Hood Energy Robin Hood Energy
  • Robin Hood Energy is a not-for-profit supplier.
  • Boast a UK-based call centre.
  • Look to provide energy at the lowest price possible.
Sainsbury's Energy Sainsbury's Energy
  • Sainsbury's Energy works in association with British Gas.
  • The look to provide customer service and energy expertise.
  • Offer gas, electricity and boiler services.
So Energy So Energy
  • So Energy was set up to restore customer trust in suppliers.
  • Committed to delivering low prices for their customers.
  • A simplistic approach and the latest technology gives So Energy a competitive edge.
Southend Energy Southend Energy
  • Southend Energy works in partnership with OVO.
  • Dedicated to bringing competitive energy prices to Southend-On-Sea Borough Council.
  • Focus not just on low prices, but also sustainable prices.
Spark Energy Spark Energy
  • The only suppliers built around the UK lettings industry.
  • Offer tenants a tailored service and better value than the Big Six alternatives.
  • Utilise customer feedback to constantly improve their service.
Tonik Energy Tonik Energy
  • Tonik Energy is looking to halve customer bills by 2020.
  • They offer fari prices through smart technology and transparent pricing.
  • Tonik Energy is based in Birmingham.
TOTO Energy TOTO Energy
  • TOTO Energy offers customers low prices by purchasing energy at wholesale.
  • They offer a variety of payment methods to suit all customer's needs.
  • Look to provide offerings cheaper than the Big Six.
Utilita Utilita
  • Utilita is the leading provider of pre-payment meters in the UK.
  • Utilita puts per payment customers first to offer them a better deal.
  • Payments can be sent to a meter remotely, allowing customers more freedom.
Utility Warehouse Utility Warehouse
  • At least 0.5% cheaper than the Big Six.
  • Utility Warehouse will always put you on their cheapest tariff.
  • Supplies more than 500,000 domestic and commercial customers.
White Rose Energy White Rose Energy
  • White Rose Energy was launched in 2016.
  • A not-for-profit supplier.
  • Serves customers in Yorkshire.
Zog Energy Zog Energy
  • Zog Energy uses cloud computing to provide unrivalled customer service.
  • It's aim is to provide the best possible value energy to its customers.
  • They look to keep their own overheads down and pass savings on to customers.

Home gas and electricity price comparison

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