Compare The Top 4 Electricity Companies in the UK

Compare Electricity Suppliers

What’s in this guide?


Some customers think that every energy supplier is the same, so there’s no point in switching or looking for better deals.

Is this true?

Absolutely not.

While energy companies do have some similarities, as they generally get their energy from the same place, some stark differences tell some suppliers apart from each other.

For instance, Bulb Energy is a small independent energy supplier that only offers one tariff and no discounts or exit fees.

Bulb want their offers to be less confusing for their customers while also providing 100% renewable energy.

British Gas, on the other hand, offers many tariffs, but they also provide boiler cover and smart home gadgets that can not only save you money on your annual bill, but they can also help make your electricity and gas more convenient for you.

Why compare suppliers?

So why compare suppliers? Why not just go for the first deal that you see?

Because every supplier is unique in at least one way, whether it’s how their customer service rates or the services that they offer.

The ‘big six’ energy companies are enormous and reliable, with millions of customers. This attracts many customers, but on the other hand, their ratings on trusted websites such as Trustpilot tends to be more harmful than their independent competitors.

Smaller independent energy companies generally tend to offer competitive pricing and excellent customer service, but they do run more of a risk of going out of business.

This leaves a difficult choice for many customers, but there is a decent solution.

When you compare, you can place these companies next to each other and see how they match up regarding not only price but also customer satisfaction.

How do I compare?

Once you have decided that comparing energy suppliers would be an excellent choice for you, how do you get started?

First, you need to make a decision about what you value most in your supplier. Whether it costs, tariff choices, customer service and extra services.

Second, you need to have some information to hand. Ideally your postcode, your annual consumption and details like your email or phone number.

If you don’t have your annual energy consumption to hand, you can use the size of your home or the average use of your home.

Third, compare.

This is when you use a comparison tool that will give you every deal available to you within minutes, saving you a lot of time and effort.

Top 4 Electricity Suppliers

For an idea of the top electricity suppliers, this is a list of some of the most popular and highest rated energy suppliers on Trustpilot, with a rating of 4-stars and above.



Bulb Energy is a newer energy company, having been launched in 2015. This was by two industry experts that wanted to offer a more open energy company.

This fresh approach to energy has to lead to thousands of customers leaving 5-star reviews on Trustpilot, claiming that the company is ethical, well-priced and helpful.

So Energy

So Energy

So Energy claims to give their customers great value as well as giving you control over where your energy comes from. This means either solar, wind, biomass, hydroelectric or tidal and their Ofgem report will reflect what their customers have chosen.


Affect energy logo

Affect is a business that has a team with over 50 years of experience with one of the bigger energy companies. In that time they discovered that what people want is simple.

Affordable prices, and for their energy supplier to do what they say they are going to do.

So that’s what their aim is, and according to their high customer rating, they are succeeding.



Boost Power is a subsidiary of OVO Energy, which is a favourite independent energy company in the UK.

This company was explicitly created to serve prepayment customers of OVO, but they also welcome new customers. This is in a move to make sure that OVO’s prepayment customers have the support team they deserve.

Compare prices

Company Bulb So Energy Affect Boost Power
Overall Trustpilot Score ★★★★★ ★★★★★ ★★★★★ ★★★★
Discounts No No £15.75 per fuel per year No
The average cost for dual fuel three bedroom home £82 £78 £90.00 £80
Positive Reviews on Trustpilot 92% Positive 86% Positive 86% Positive 52% Positive

Switching FAQ

Is switching complicated?

No. Your new energy company will take care of things for you, including informing your current supplier that you are switching and the process of exchanging information.

How long does it take to switch?

Energy suppliers have a 14 day cooling off period where you can cancel your switch without a fee.

Energy companies do not do anything during that period as it gives you a chance to back out of your switch, sometimes this might be in light of new information.

After that, however, it can take around a month to complete the switching process.

Energy suppliers will update you frequently on the process of your switch.

Aren’t all energy suppliers the same?

The difference between many suppliers is not just cost, but it’s also the way that they treat their customers regarding customer support and dealing with complaints.

Many customers say that customer service is more important than the price of the tariffs, which many customers say they are happy to pay a bit more to stay with a helpful and considerate supplier.

Can my tariff come with me when I move?

You may be able to take your cheap tariff with you when you move, but you need to get in contact with your supplier first and check.

Once I switch, will my supplier tell me if prices rise?

Prices are predicted to increase between 30% and 40% in the next five years.

This can mean some serious rises in costs for customers, especially those who might already be paying more for their energy.

But, your energy supplier has to warn you about these price rises with a minimum of 30 days notice.


Are you on the cheapest electricity tariff? Would you like to see your options?

Take a look at the EnergySeek guides to find out more about your energy, or see reviews of the top 7 energy switching sites to compare gas & electricity.