Our energy expert

Who are the Best UK Energy Suppliers in 2020?

Although most of us switch energy suppliers to help lower our energy bills, there's actually much more to it than simply saving money.

If you choose a provider who has trouble billing you accurately or offers poor customer service, you could find they're more trouble than they're worth, regardless of how cheap their energy prices are.

That's why it's useful to know who the UK's best and worst energy suppliers are - the key to switching energy is making an informed decision on everything, including price.

Here is a rundown of the UK's best (and worst) energy suppliers, as revealed in this year's energy survey from Which?, the consumer magazine.

What is the Which? Annual Energy Survey?

Each year, Which? runs a survey of 8,000 energy users to drill down into which UK energy suppliers are offering the best overall service, taking into account the following:

  • Bill accuracy
  • Customer service (phone)
  • Customer service (online)
  • Complaints handling
  • Helping you understand and reduce energy use
  • Value for money

When the results are in, each supplier is given a percentage rating, which dictates their final position in the table.

Check out this year's results to find out where your supplier ranks.

Who are the best energy suppliers?

Here is a list of the best energy suppliers in 2020:

Energy SupplierWhich? Customer Score
Octopus Energy83%
Bulb Energy78%
Pure Planet78%
People's Energy77%
So Energy75%
Bristol Energy73%
Co-operative Energy73%
OVO Energy73%

No-one likes high energy rates, so it's hardly surprising that the UK's best energy companies all ranked highly in the 'Value for money' category.

But the ease with which households can switch suppliers means they can demand more than just cheaper energy bills - if energy companies don't measure up in terms of billing and customer service, those customers can vote with their feet and move on.

Octopus Energy is the UK's number one energy supplier for the second year running, getting a five-star rating in three of the five categories and a hugely impressive customer satisfaction score of 83%.

Ebico improved on last year's 4th placed finish, moving into number two at the expense of So Energy, who dropped to joint 7th this year, and Bulb Energy was closely behind in third position, up five places on 2019.

It's the next two results that are most interesting though, as two newcomers entered in 4th and joint 5th - both are ethically and environmentally conscious energy suppliers, suggesting more households are looking for greener energy options to help do their bit for the planet as well as their pocket.

Who are the UK's worst energy suppliers?

In this list we show the worst energy companies in 2020:

Energy SupplierWhich? Customer Score
Robin Hood Energy65%
British Gas60%
EDF Energy60%
Shell Energy58%
Green Star Energy55%
Scottish Power51%
Spark Energy51%
Together Energy48%

If you're with one of the big six energy suppliers, the chances are you're not 100% happy with the service you're getting - amazingly, the UK's biggest providers of household gas and electricity usage all featured in the lower rankings.

The big surprises at the bottom of the table were Robin Hood Energy - who dropped from second place in 2019 to 20th this year following troubles which saw it needing a £25.5 million bailout from the government - and Scottish Power, who don't seem to have taken any of last year's failings on board and actually managed to get a lower score than 2019's meagre 51%.

It's probably no surprise that Spark Energy and Together Energy took the bottom two places though - Spark Energy almost went bust before Ovo Energy bailed it out with a takeover, while Together Energy was already struggling before it became completely overwhelmed by the flood of new customers it took on when it became the supplier of last resort for One Select customers.

What to do if you're unhappy with your energy supplier

If you're unhappy with your supplier, you can formally raise a complaint. The first thing to do in this instance is complain directly to your supplier, either in writing or by email so you have a written record of the complaint.

They will then have eight weeks to respond. If they don't, or they don't resolve the issue to your satisfaction, you can then escalate the complaint to the energy ombudsman. For more details on how to make an energy complaint, go to our energy supplier complaints page.

But the best thing to do if you're unhappy with your energy supplier is to switch to a different one - and you can compare energy suppliers online in just a few clicks with The Energy Shop.

To compare gas and electricity prices with The Energy Shop, just enter your postcode in the box at the top of the page and you'll be taken to our energy price comparison tool, where we just need a few more details to find the best gas and electricity deals in your area.

We'll then compare energy tariffs from suppliers across the entire energy market, so you can be sure there's a money-saving deal that's right for you.

When you find an energy deal you like, just click to switch and we'll take care of the rest - our switching tool will automatically send your application securely to your supplier of choice, who will then let your current supplier know that you want to leave.

The energy switch should then be completed within 21 days, meaning you'll be enjoying lower energy bills within a matter of weeks.

Compare Energy Prices. Switch & Save up to £232!

You may also be interested in:

Ofgem Confidence Code
Fully accredited by Ofgem since 2003