Octopus Energy vs So Energy (2024 Comparison)

Last updated: 8th March 2023

In this article, we will compare energy suppliers Octopus Energy and So Energy to see which could be the best supplier for you to switch to.

We look at customer reviews, their tariffs, their prices and much more to see how they compare against each other.

Our top rated supplier Octopus Energy is currently offering £50 credit to any new customer that uses our referral link. Click below to see why we rate them so highly and get your £50.

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Who is So Energy?

So Energy started in 2015 and is one of the smaller energy suppliers in the UK. Despite the energy crisis in 2021, which caused many companies of its size to fail, So Energy is still going strong. It even teamed up with what used to be ESB Energy. Right now, the supplier has about 300,000 customers.

Its focus is on green energy and customer service, wanting to help people lessen their impact on the environment.

An interesting thing about So Energy is that customers can choose where their green energy comes from through voting. This is something special that we haven’t seen with any other company.

Who are Octopus Energy?

Octopus Energy, although not the biggest energy company in the UK, has managed to gain about 5 million customers since starting in 2016.

It invests heavily in green energy and claims to try to give its customers renewable energy at a good price.

Octopus has also helped out by taking in customers from other energy companies that have shut down recently, like Bulb and Avro Energy.

Octopus Energy vs So Energy: What’s the difference in price?

We compared Octopus Energy and So Energy with a head-to-head comparison to see which offers the best value for money across all tariffs.

For each comparison, we used the following details:

  • Dual Fuel supply
  • Standard Meter
  • Medium usage (3-bedroom house with four occupants)
  • 2,900 kWh of electricity and 12,000 kWh of gas
  • Postcode in East Midlands

Let’s see if Octopus Energy is cheaper than So Energy or vice versa.

So Energy

So Energy offered us two tariffs on its website, one fixed tariff and one variable:

Tariff NameTariff DescriptionMonthly Cost
So FlexPrices can go up and down over time. No exit fees.£164.90
So OrangeThis is a 12-month fixed tariff with 100% renewable electricity and £75 exit fees.£146.47


We used the same details to get a price from Octopus Energy.

Here are the prices it offers:

Tariff NameTariff DescriptionMonthly Cost
Tracker TariffSmart tariff where prices change daily. No contract. No exit fees.*£92.99
Flexible OctopusFlexible tariff where prices go up and down with the market. No contract.£141.67
Octopus 12M Fixed12-month, fixed rate contract. No exit fees.£142.51
*Using an average rate over previous months for both fuels. Only available to existing customers. Source.

Conclusion: Is Octopus cheaper than So Energy? Yes, if you want a fixed tariff, variable tariff or even a smart tariff, Octopus is cheaper for all three.

What’s the difference in tariff options?

Here we compare the tariffs which Octopus and So Energy offer their new customers.

Firstly, let us look at So Energy’s options:

So Energy

So Flex

– No Exit Fees
– Your prices could go up or down over time
– No tariff end date

So Orange

– Tariff is fixed for 12 months
– 100% green electricity
– Exit fees of £75 per fuel


At this time, Octopus is offering three tariffs:

Flexible Octopus

– This is a variable rate tariff
– Offers 100% renewable electricity
– No exit fees

Octopus 12M Fixed

– This is a 12-month contract with unit prices and standing charges fixed for that time
– No exit fees
– 100% renewable electricity

Tracker Tariff

– Unit rates change daily
– No exit fees
– Only available with a smart meter
– Not available on signing up – see below for more details
– Unit rate is capped at 100p/kWh for electricity and 30p/kWh for gas (including VAT)
Conclusion: Regarding tariffs, there isn’t much difference between these two suppliers, as they both offer one fixed and one variable tariff. Octopus offers a smart tariff, however, which slightly sets it apart.

Other differences are that the Octopus variable tariff comes with renewable electricity, whereas So Energy does not, and the Octopus fixed tariff has no exit fees.

Who has better customer reviews?

We checked out customer reviews for Octopus Energy and So Energy on Trustpilot to see how these energy companies compare in terms of service and how they treat their customers.

We chose Trustpilot for our comparison because it has the most reviews for each that are written by real customers.

Here is what we found:

  • So Energy scores 4.0 out of 5 based on over 16,000 reviews (source)
  • Octopus score 4.8 out of 5 based on over 245,000 reviews (source)

14% of So Energy customers gave them a 1-star rating on Trustpilot, and 73% of reviewers gave them a 5-star rating.

Octopus come off much better when being reviewed by their customers. With 89% of their customers giving them a 5-star excellent rating. Most customers state they always receive friendly service, and their queries are quickly resolved.

Conclusion: When it comes to customer reviews, Octopus clearly performs better than So Energy. It has a much higher overall score, with a higher proportion of customers providing 5-star reviews.

Who has the better app?

Here we normally compare both suppliers’ apps to see if one is better than the other. So Energy does not have an app on either iOS or Android, so it is not possible to review their app!

Octopus Energy offers an app for both iOS and Google Play, and it has received widespread acclaim from users on both platforms. The iOS app boasts an impressive rating of 4.8 out of 5 from more than 88,000 reviews, while the Android version has a strong rating of 4.5 out of 5 from over 17,000 reviews.

These apps enable users to fully manage their accounts, including bill payments, usage monitoring, and submitting meter readings for those without smart meters.

A unique feature of the app is its support for ‘Savings Sessions.‘ Users can get notifications about when these sessions are set to occur, register to participate, and even track the amount of energy they save through the app.

Conclusion: With only Octopus actually having an app, they win this round!

Octopus vs So Energy: Who has the better customer service?

On the Citizens Advice website, you can see how energy suppliers perform in key areas when it comes to customer service. These stats are updated by Citizens Advice every quarter.

Below, we have picked out the key stats for these two suppliers:

OctopusSo Energy
Average call centre wait time04:5004:12
Emails responded to within 2 days66.1%36.3%
Fewer complaints received2/51/5
Contact waiting time2/52/5
Customer commitments5/55/5
Opening hours9 am – 5 pm (4 pm Friday)Mon to Fri 9 am – 5 pm
Contact via PhoneYesYes
Contact via EmailYesYes
Contact via WebchatNoNo
Source: Citizens Advice
Conclusion: Apart from call centre waiting times, where So Energy perform slightly better, Octopus perform either better or the same in every other area.

The biggest difference is in the percentage of emails that are responded to within two days, with Octopus performing much better.

What are the main differences between the two?

We’ve looked in detail at how each supplier performs in the key areas you need to know when switching suppliers. Below is a summary of our findings:

Tariff OptionsWhen it comes to tariff choices, this is close, but Octopus won with an additional tariff option, 100% renewable electricity and no exit fees.Octopus
PriceWhen it comes to price, Octopus are the cheapest across all tariff optionsOctopus
Customer ReviewsOctopus wins again here with much higher review scoresOctopus
AppWith only Octopus having an app, they win this round.Octopus
Customer ServiceThis was close, with neither supplier performing well, but Octopus came out slightly better.Octopus

Is Octopus Energy better than So Energy?

In our opinion, Octopus Energy is likely to be the better option for most people looking to switch energy suppliers. It offers better tariff options and cheaper prices, has an app and has better customer reviews and customer service.

Our top rated supplier Octopus Energy is currently offering £50 credit to any new customer that uses our referral link. Click below to see why we rate them so highly and get your £50.

Read our review


Hi, I'm Rob and I run Energy-Review.co.uk. I initially started this project 5 years ago when I was looking to switch energy suppliers and found there wasn't a website that provided simple, data backed reviews on all the suppliers available. Since then, I spent have a lot of time (too much some may say!) looking at all publicly available data about each supplier and writing reviews using this information. These reviews are updated as regularly as possible and any data is backed up by a source where necessary. I have also started writing guides on various energy related topics which hopefully you will find useful. If you find any issues, please use our contact form to let us know.

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