Which is the UK's best energy supplier in 2021?

Person next to electricity symbol representing best energy supplier

Are you looking to switch your energy supplier? In this guide, we compare providers in terms of price, customer service and sustainability to help you find the best energy supplier for your home.

The UK energy market consists of nearly 60 energy suppliers. With so many options, it can be difficult to decide which is the best energy supplier for your household.

When choosing the best energy supplier for your home, there are a few different aspects that you may want to consider. We recommend you establish your priorities before starting to compare energy plans in order to find the best energy supplier to suit your needs.

Are you looking for the tariff with the cheapest price, or are you more concerned with having reliable customer support? Maybe you’re interested in saving the planet and would like to go with a green energy supplier.

Whatever it may be, we’re here to help! In this guide, we break down the top energy suppliers in terms of price, customer service and sustainability so that you can decide which is the best energy supplier for you and your home.

Get free energy advice and switch to a great offer!Our trained advisors can find you a cheaper offer in just a few minutes. Call 01704 335 575 or get a free callback now.

Which supplier offers the best price?

When it comes to choosing an energy provider, most people are concerned with finding the best energy supplier in terms of price.

Unfortunately, there is no one best energy supplier for all when it comes to price. How much you pay for gas and electricity varies depending on your location and the amount of energy that your household consumes.

To give you an idea, we break down the top suppliers with the cheapest dual-fuel energy tariffs for a mid-sized household in London in the table below. For our calculations, we have used the national consumption averages of 2,900 kWh of electricity and 12,000 kWh of gas per year.

Energy Provider Cheapest tariff Estimated monthly spend Estimated annual spend
Outfox the Market Fix’d 20 11.0 £63.89 £766.68
Tonik Energy Green SuperPower £64.22 £770.66
Avro Energy Simple and SuperFixed £64.57 £774.85
Yorkshire Energy GreenMalham £66.21 £794.50
Igloo Energy Igloo Pioneer £66.63 £799.59

You should compare prices based on your own location and consumption for the most accurate price projection.

Here at Selectra, we can compare deals in your area to find you the best price. Call 0170 433 5575 or request a callback a free comparison.

For a more detailed analysis on how to find the best energy supplier when it comes to price, check out our guides for the cheapest electricity supplier and cheapest gas supplier.

Which is the best energy supplier for customer satisfaction?

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When deciding on an energy supplier for your home, the cheapest one may not actually be the best choice.

We recommend you choose a supplier that provides high-quality customer support. You want a supplier that you can trust to answer the phone when you’ve got a problem and that will provide accurate billing instead of just relying on estimates.

The table below displays the best energy suppliers in terms of customer service and support, according to the latest research from Citizens Advice. The organisation regularly compares UK energy suppliers across the following six categories:

  • Number of complaints per 10,000 customers
  • Average call centre wait time
  • Switches completed within 21 days
  • Customers who had an accurate bill in the past year
  • Bills and statements sent on time
  • Customer guarantees
Rank Energy Supplier Rating
1 EDF Energy 4.45
2 Igloo Energy 4.4
2 So Energy 4.4
4 M&S Energy 4.35
5 SSE Energy 4.2
6 ESB Energy 4.05
7 Octopus Energy 3.95
7 British Gas 3.95
9 Npower 3.8
10 Co-operative Energy 3.75

Which supplier receives the fewest complaints?

Suppliers that excel at customer service are more likely to receive fewer customer complaints.

Energy suppliers are required to publish their complaints handling data. Let’s have a look at which are the best energy suppliers in terms of receiving the least amount of complaints.

In the table below, we list the number of complaints per 10,000 customers, thus enabling a fair comparison that does not depend on the size of the companies’ customer base.

M&S Energy, Octopus Energy and Co-operative Energy share the same number of complaints because these suppliers are all operated by Octopus Energy.

Rank Energy Supplier Number of complaints per 10,000 customers
1 Igloo Energy 0.5
2 So Energy 1.9
3 Affect Energy 4.5
4 SSE 4.8
5 E Gas and Electricity 6.4
6 People’s Energy Company 7.4
7 EDF Energy 11
8 ESB Energy 12.1
9 M&S Energy 13.2
9 Octopus Energy 13.2
9 Co-operative Energy 13.2
12 Utility Warehouse 13.8

Which are the best green energy suppliers?

wind turbine

If you’re interested in doing your part to protect the environment, then choosing a supplier that gets 100% of its electricity from renewable sources (like solar, wind and hydropower) may be the best energy supplier for you.

Energy providers buy electricity and gas on the wholesale market from electricity generators and gas producers. Electricity can be generated from a variety of sources, and we are continuing to see an increase in the use of renewable energy sources in particular.

Contrary to common belief, green energy suppliers are no longer much more expensive, if at all, than other energy suppliers who rely on nonrenewable sources.

The following energy suppliers provide 100% renewable electricity. Some other suppliers, such as Eon and Ovo Energy, also provide select energy tariffs with 100% renewable electricity.

100% Renewable Electricity Suppliers
So Energy M&S Energy Octopus Energy
Co-operative Energy People’s Energy Company Good Energy
Shell Energy Bulb Energy Yorkshire Energy
Tonik Energy Pure Planet Outfox the Market
Green Star Energy Robin Hood Energy Ecotricity

Want to help stop the climate crisis?Low carbon electricity and gas can be just as cheap as normal energy. Call one of our advisors to get a quote today! Call us for a free assessment today. Call 01704 335 575 or get a free callback now.

Which is the best out of the Big Six?

The term ‘Big Six’ is used to describe the six largest energy companies in the UK. This dominant group has traditionally been made up of the following providers:

EDF Energy stands out as the best energy supplier among these six companies. Founded in France, the supplier is one of Europe’s largest energy companies.

EDF Energy received the highest customer satisfaction rating from Citizens Advice, coming in at first place out of all the energy suppliers in the UK! The company offers a wide range of tariffs for all customers and meter types. The cheapest plans are managed entirely online and paid via a monthly direct debit.

EDF Energy is also a leader in providing low-carbon energy. The company owns 35 wind farms and 70% of its energy comes from nuclear power, which is the most affordable source of low-carbon energy that is available in the UK.

If you would like EDF Energy to supply your home’s gas and electricity, give us a call at Selectra on 0170 433 5575 to get a free quote.

Compare and switch with Selectra

Here at Selectra, our dedicated energy experts can help you decide which is the best energy supplier for your home. We also offer exclusive deals that are not available through provider websites.

Give us a call on 0170 433 5575 or request a callback today. You’ll quickly get through to one of our advisors and be able to get expert energy advice for free!

We’ll be able to compare energy prices in your area and tell you which supplier has the best offer. We can even go ahead and register you with a new provider so that you can start receiving better service and saving hundreds on your energy bills today.

We recommend having the following details ready when you call to switch:

  • Account holder name and address.
  • The name of your current energy supplier and tariff.
  • Your meter type.
  • Your annual energy consumption and/or spend.

Not sure how much energy your household consumes? Try using our consumption calculator.

If you’re not able to provide any of the above details, that’s okay. We can still search for the best deals in your area with just your postcode.

Switching to the best energy supplier for you is quick and easy. After you register, you’ll have a 14-day cooling-off period, during which you can cancel the switch and nothing happens. After this two-week period ends, it can take up to a week before the supply officially switches. You can rest assured that at no time will your energy supply be interrupted.

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