Energy Suppliers
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Key information
Energy suppliers are the companies that supply the gas and electricity in your home. Most energy companies in the UK do not own any of the networks of cables or pipes that deliver the gas and electricity to your home.
We’ve made it easy to start an energy comparison and switch suppliers using Utility Saving Expert.
In the UK there are around 60 energy suppliers. We check the tariffs of every single energy supplier and show you the best tariffs you can get in your home. If you decide to switch to a cheaper supplier, it’s quick and simple with Utility Saving Expert.
We are paid a fee from the suppliers for every switch completed. The fee is already included within the marketing budgets of the energy suppliers so the prices you see on our site are the same as you’ll see on theirs.
Who are the ‘Big 6’ energy suppliers?
You’ve probably heard people talking about the ‘Big 6’ energy suppliers.
When people refer to the ‘Big 6’, they mean the six largest companies supplying gas and electricity to homes and businesses in the UK. Together, the ‘Big 6’ energy companies supply over 90% of the homes in Britain, which means they completely dominate the market.
The ‘Big 6’ energy companies are:
- British Gas
- EDF Energy
- nPower
- EON UK
- Scottish Power
- SSE
Ofgem accredited
Power to Switch
Our Fuel Poverty Promise
Which energy supplier should I choose?
You can find out more about the UK’s 60+ energy suppliers here. Each of our guides includes:
- A basic introduction to the energy supplier
- The history of the energy suppliers
- The schemes the energy suppliers have in place to help people who are on a low income or in debt
- The fuel mix used in the energy suppliers electricity generation
- The current tariffs offered by the energy suppliers
To switch commercial energy please visit our business energy page.
Compare Business Electricity Prices, Suppliers & kWh Rates
List of UK energy suppliers
Use this section of the website to find out more about the UK’s energy suppliers.
| Energy Supplier | Supplier Overview | Which? Customer score* |
|---|---|---|
| Affect Energy | Affect Energy is one of the newer energy suppliers in the market | Not Yet Rated |
| Green Energy (UK) | Green Energy (UK) supplies all its electricity from renewable sources | Not Yet Rated |
*Which? customer score is a percentage of overall satisfaction with a particular energy supplier. It takes into account the following; 1. Bill accuracy 2. Bill clarity 3. Customer Service (phone) 4. Customer Service (online) 5. Complaints handling 6. Helping customers understand and reduce energy use and 7. overall value for money. For more information please visit: https://switch.which.co.uk/energy-suppliers/energy-companies-rated.html
Compare Business Electricity Prices, Suppliers & kWh Rates
List of business energy suppliers
Our business supplier comparison engine compares the following providers and many more:
Compare business gas and business electricity tariffs within minutes through Utility Saving Expert.
| Energy Supplier | Supplier Overview | Which? Customer score* |
|---|---|---|
| Affect Energy | Affect Energy is one of the newer energy suppliers in the market | Not Yet Rated |
| Green Energy (UK) | Green Energy (UK) supplies all its electricity from renewable sources | Not Yet Rated |
| Avro Energy | Avro Energy is a new supplier that entered the market in 2015 | 64% |
| Beam Energy | Beam Energy is new supplier owned and operated by London Borough of Barking and Dagenham Council. | 64% |
| Green Star Energy | Green Star Energy focuses on offering cost-effective gas and electricity | 65% |
| Better Energy | Better Energy promises to offer the lowest gas prices available | Not Yet Rated |
| Enstroga Energy | Enstroga Energy is a new independant gas and electricity supplier | Not Yet Rated |
| Angelic Energy | Angelic Energy is owned and operated by Islington Council | Not Yet Rated |
| ESB Energy | ESB Energy offers great valuie gas and electricity tariffs | Not Yet Rated |
| Bristol Energy | Bristol Energy describes itself as an energy supplier with a social conscience | 72% |
| British Gas | British Gas is the biggest of all the energy suppliers in the UK | 56% |
| Bulb Energy | Bulb is a supplier of renewable energy that promises competitive prices | 72% |
| Cardiff Energy Supply | CESL promises you will always pay one of the lowest tariffs on the market | Not Yet Rated |
| Co-Operative Energy | Co-operative Energy is the only energy supplier owned by its customers | N/A |
| Boost Power | Boost Power is a releatively new pre-payment energy provider | N/A |
| Utility Warehouse | Utility Warehouse is committed to offering cheaper tariffs than the Big 6 | 73% |
| Daligas | Daligas is an energy company promising transparency and simplicity | Not Yet Rated |
| EBICo | EBICo is a not-for-profit renewable energy company offering fair prices | 76% |
| Economy Energy | Economy Energy is a gas and electricity company offering low tariffs | 53% |
| Ecotricity | Ecotricity is a not-for-profit renewable energy company with ethical pricing | N/A |
| E.On | E.ON UK is the fourth biggest energy supplier in the UK | 57% |
| EDF Energy | EDF Energy is the second biggest energy supplier in the UK | 57% |
| Fairerpower | Fairerpower is a partnership between OVO Energy and Cheshire East Council | Not Yet Rated |
| Shell Energy (formerly First Utility) | Shell Energy (formerly First Utility) is one of the UK’s largest independent energy companies | Not Yet Rated |
| Flow Energy | Flow Energy is one of the energy market’s newest suppliers | 68% |
| Future Energy | Future Energy only offers one gas and one electricity tariff | Not Yet Rated |
| GB Energy | GB Energy is now part of The Co-operative Energy | Not Yet Rated |
| Glide | Glide provides bill sharing services and student utility bills | Not Yet Rated |
| Gen4U | Gen4U is an energy company offering low prices and good service | Not Yet Rated |
| Go Effortless Energy | Go Effortless Energy only offers one gas and one electricity tariff | Not Yet Rated |
| Good Energy | Good Energy supplies all its electricity from renewable sources | Not Yet Rated |
| GnERGY | GnERGY promises to be an open and honest gas and electricity company | Not Yet Rated |
| White Rose Energy | White Rose Energy is a not-for-profit gas and electricity supplier | Not Yet Rated |
| Utilita | Utilita provides prepayment meters to low income and energy conscious households | 71% |
| Octopus Energy | Octopus Energy is a new energy supplier with straightforward pricing | 80% |
| Iresa Limited | Iresa Limited focuses on delivering straightforward prices, billing and service | Not Yet Rated |
| npower | npower is the third biggest gas and electricity supplier in Britain | 54% |
| Peterborough Energy | Southend Energy is a partnership between OVO Energy and Peterborough City Council | Not Yet Rated |
| Tonik Energy | Tonik Energy wants to halve customers’ energy bills by 2022 | Not Yet Rated |
| Together Energy | Together Energy wants to be the most trusted energy company | 60% |
| The Energy Deal | The Energy Deal wants to combine fair prices and enjoyable service | Not Yet Rated |
| SO Energy | SO Energy promises its tariffs will always be among the cheapest | 78% |
| Robin Hood Energy | Robin Hood Energy is an independent not-for-profit gas and electricity supplier | 78% |
| Sainsbury Energy | Sainsbury’s Energy is a partnership between Sainsbury’s and npower | 63% |
| Scottish Power | Scottish Power is the fifth biggest energy supplier in the UK | 54% |
| Places for People Energy | Places for People Energy promises great service and great savings | Not Yet Rated |
| iSupply Energy | iSupply Energy promises to offer straightforward low prices, not complicated deals | 57% |
| LoCO2 Energy | LoCO2 Energy is an independent company offering renewable energy at competitive prices | Not Yet Rated |
| M&S Energy | M&S Energy matches all its electricity with UK-based renewable sources | Not Yet Rated |
| National Gas | National Gas is a very new energy supplier that only supplies gas | Not Yet Rated |
| OVO Energy | OVO Energy delivers a high proportion of its energy from renewable sources | 74% |
| Southend Energy | Southend Energy is a partnership between OVO Energy and Southend-on-Sea Borough Council | Not Yet Rated |
| Spark Energy | Spark Energy is one of the biggest energy companies outside the Big 6 | 52% |
| SSE | SSE is the sixth biggest gas and electricity supplier in Britain | 58% |
| SSE Airtricity | SSE Airtricity is a member of the SSE Group | 62% |
| SSE Southern Electric | SSE Southern Electric is a member of the SSE Group | 62% |
| SSE SWALEC | SSE SWALEC is a member of the SSE Group | Not Yet Rated |
*Which? customer score is a percentage of overall satisfaction with a particular energy supplier. It takes into account the following; 1. Bill accuracy 2. Bill clarity 3. Customer Service (phone) 4. Customer Service (online) 5. Complaints handling 6. Helping customers understand and reduce energy use and 7. overall value for money. For more information please visit: https://switch.which.co.uk/energy-suppliers/energy-companies-rated.html
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