Octopus Energy Fuse Energy (July 2026)
Overview
Octopus Energy offers proven customer service, but Fuse Energy provides a much cheaper fixed tariff.
Octopus Energy places first overall due to its established service ratings from independent bodies and strong customer reviews. However, Fuse Energy currently offers a notably cheaper fixed tariff, which may suit households looking to secure a set price.
About Octopus Energy and Fuse Energy
Who are Octopus Energy?
Octopus Energy started in 2015 and is now the UK's largest domestic energy supplier. It grew quickly by taking on customers from suppliers that closed down. The company runs its own in-house technology platform to manage customer accounts and billing. It is known for its wide range of smart tariffs, which help people save money if they can shift their energy use to cheaper times of day. It also installs home technology, such as heat pumps and electric vehicle chargers, and runs a rewards scheme called Octoplus.
Who are Fuse Energy?
Fuse Energy is an app-based supplier founded in 2022 that launched publicly in 2023. Started by two former executives from a banking app, it is backed by major investment funds and is one of the UK's newer challenger suppliers. Customers can manage their accounts, track their energy use, and contact customer support through the Fuse app, which includes an AI assistant to answer questions. The app gives customers daily billing forecasts that update every 30 minutes.
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Tariffs and pricing
The lowest-priced deal across both suppliers is the July 2026 Fixed (15m) V6 from Fuse Energy. Priced at £1,563 a year, it includes a £100 exit fee. In comparison, Octopus Energy's most affordable option is the Octopus 12M Fixed July 2026 v2, costing £1,697 a year with an identical £100 exit fee. While both are fixed-term tariffs, the Fuse Energy contract lasts for 15 months, whereas the Octopus deal runs for a 12-month term.
Households seeking a contract without a fixed term might consider the Flexible Octopus variable tariff, which costs £1,792 a year. The equivalent Variable Import tariff from Fuse Energy is priced slightly higher at £1,805 a year.
Octopus Energy and Fuse Energy: Tariff Options
Octopus Energy
Octopus Energy offers mainstream standard variable and fixed-term tariffs, alongside a wide range of smart and specialist options for engaged customers and those with green technology.
Fuse Energy
Fuse Energy offers standard variable and fixed-term tariffs, as well as specialist options for electric vehicle drivers and homes with solar panels.
Customer reviews
Both suppliers hold a Trustpilot rating of 4.8 out of 5, and 90% of reviewers award them five stars. Octopus Energy has accumulated a substantial volume of feedback with over 820,000 reviews. Fuse Energy has a smaller sample size, currently standing at just over 7,000 reviews.
Feedback for Octopus Energy frequently highlights helpful staff and prompt issue resolution, though some customers report difficulties connecting by phone or interacting with less experienced agents. Fuse Energy customers commonly mention professional support and fast response times, alongside a straightforward switching process.
In the latest annual Which? survey, Octopus Energy achieves a score of 74. This includes a 4 out of 5 rating for customer service and 10 out of 10 for helping those who need it. Fuse Energy does not currently hold a Which? score.
App quality and features
The Octopus Energy iOS app maintains a 4.8 rating across more than 245,000 reviews, placing it slightly ahead of the Fuse Energy app, which scores 4.7. Both applications have received recent updates.
For Android users on Google Play, Fuse Energy holds a higher rating of 4.79, compared to 4.43 for Octopus Energy. Fuse Energy also records a larger proportion of positive Android ratings, although Octopus Energy operates with a significantly broader user base of over 1,000,000 installs.
A recent sample of iOS reviews for Fuse Energy indicates that customers appreciate the human support team. However, one user noted that broader company service required improvement, even with effective chat support in place.
Customer service and support
Octopus Energy places 4th in the latest Citizens Advice data, achieving an overall score of 3.67 out of 5. The supplier answers calls in an average of 1 minute 17 seconds and responds to 86.1% of emails within two days. Fuse Energy does not currently feature in the Citizens Advice rankings.
Octopus Energy maintains formal vulnerability commitments registered with Citizens Advice. Its telephone support operates Monday to Thursday from 9am to 5pm, and Friday from 9am to 4pm, remaining closed on weekends. Payment methods accepted include Direct Debit, cash, cheque, and prepayment.
Complaints and performance
In the last three months of 2025, Octopus Energy received 495 complaints for every 100,000 customers. It fixed 45% of these by the end of the next working day, and 79% within eight weeks. There is no complaints data available for Fuse Energy.
Green Energy Comparison
Octopus Energy
Octopus Energy supplies 100% zero-carbon electricity. Based on Citizens Advice data from early 2026, this is made up of a mostly renewable mix, with some nuclear power. The company also invests directly in building new wind and solar farms through its own generation business and helps customers move to greener technology by installing heat pumps, solar panels, and electric vehicle chargers.
Fuse Energy
Fuse Energy takes a different approach to green claims. It openly states that it does not buy renewable energy certificates just to label its electricity as 100% renewable. Instead, it sells the certificates it earns from its own wind and solar farms and reinvests 100% of its profits into building new renewable energy projects around the world. The company also supports green technology by offering tariffs designed for electric vehicles and solar panel exports.
Our verdict
| If you care most about | Choose |
|---|---|
| The lowest annual cost on our assumptions | Fuse Energy |
| Overall customer service | Octopus Energy |
| A well-rated mobile app | Octopus Energy |
Octopus Energy offers proven customer service, but Fuse Energy provides a much cheaper fixed tariff.
As the UK's largest energy supplier, Octopus Energy leads in independent service metrics and iOS app ratings, while also providing a slightly cheaper standard variable tariff. Conversely, Fuse Energy offers a significantly cheaper fixed tariff.
As a newer challenger supplier, Fuse Energy currently lacks the independent Which? and Citizens Advice data where Octopus Energy performs strongly. Fuse Energy may suit households prioritising a cheaper fixed deal based on current prices, whereas Octopus Energy is an alternative for those who prefer a supplier with an established service history.
- Established customer service record in independent surveys
- Lower-priced standard variable tariff
- Highly rated iOS application
- Fixed tariff costs more than the Fuse Energy equivalent
- Lower Google Play rating compared to Fuse Energy
- Significantly cheaper fixed tariff
- Higher Google Play rating
- Strong Trustpilot scores
- Lacks Citizens Advice and Which? data
- Standard variable tariff is slightly more expensive
Frequently asked questions
Which supplier is better overall?
Octopus Energy wins overall because it has established ratings from independent bodies like Citizens Advice and Which?. However, Fuse Energy currently offers a much cheaper fixed tariff, making it a strong option for households focused on price.
Who has the cheapest fixed tariff?
Fuse Energy has the cheaper fixed deal. Its July 2026 Fixed (15m) V6 tariff costs £1,563 a year, compared to £1,697 a year for Octopus Energy's cheapest fixed option.
What do customers say on Trustpilot?
Both suppliers score 4.8 out of 5 on Trustpilot. Octopus Energy has over 820,000 reviews, with customers praising helpful staff and quick problem resolution. Fuse Energy has a smaller total of over 7,000 reviews, with customers highlighting professional support and a smooth switching process.
Who has the better mobile app?
Octopus Energy leads on iOS with a 4.8 rating on the App Store, compared to 4.7 for Fuse Energy. However, Fuse Energy takes the lead on Android with a 4.79 rating on Google Play, while Octopus Energy scores 4.43.
Do both suppliers have a Citizens Advice score?
No. Octopus Energy scores 3.67 out of 5 and ranks 4th in the latest Citizens Advice data. Fuse Energy is a newer supplier and is not currently included in the rankings.
Should I choose Octopus Energy or Fuse Energy?
If you want a cheaper fixed tariff, Fuse Energy is the better choice based on current prices. If you prefer a supplier with a proven track record for customer service in independent surveys, Octopus Energy is the more evidence-backed choice.
Are there exit fees on their cheapest tariffs?
Yes. Both the Octopus 12M Fixed July 2026 v2 and the Fuse Energy July 2026 Fixed (15m) V6 carry a £100 exit fee.
Do they offer green energy?
Yes. Octopus Energy supplies 100% zero-carbon electricity and invests directly in renewable generation. Fuse Energy does not buy renewable certificates, but instead reinvests its profits into building new renewable energy projects.
What changed this month
This month, Fuse Energy's cheapest tariff term changed from a variable tariff to a 15-month fixed deal, Octopus Energy's cheapest tariff term changed from a variable tariff to a 12-month fixed deal, and Fuse Energy's tariff count rose from 1 to 3. There were 37 other data changes this month — see the full changelog below for details.
Data changes this month (44)
Octopus Energy
- Trustpilot reviews807,247 → 821,111
- iOS app ratings count244,000 → 245,000
- iOS app days since last update25 → 9
- Play Store rating4.4444447 → 4.4341745
- Play Store ratings count46,777 → 46,873
- Play Store days since last update25 → 11
- Play Store positive ratings %87 → 86.7
- Play Store negative ratings %9.8 → 10
- Play Store neutral ratings %3.2 → 3.3
- Play Store net-positive %77.2 → 76.7
- Citizens Advice rank3 → 4
- Citizens Advice score3.78 → 3.67
- Complaints per 10,000 customers21.8 → 21.3
- Avg call centre wait time72 → 77
- Emails responded within 2 days %90.4 → 86.1
- Cheapest variable tariff£1,566.25 → £1,792.32
- Cheapest fixed tariff£1,691.36 → £1,697.05
- Cheapest tariff£1,566.25 → £1,697.05
- Cheapest tariff exit fee£0 → £100
- Cheapest tariff termvariable → 12 months
Fuse Energy
- Trustpilot reviews6,367 → 7,274
- Trustpilot 5-star %89 → 90
- Trustpilot 4-star %4 → 3
- Trustpilot negative reviews replied %69 → 76
- iOS app ratings count542 → 548
- iOS app days since last update6 → 9
- Play Store rating4.77 → 4.7884617
- Play Store ratings count570 → 617
- Play Store days since last update24 → 9
- Play Store positive ratings %93.3 → 93.6
- Play Store negative ratings %4.8 → 4.6
- Play Store neutral ratings %1.9 → 1.8
- Play Store net-positive %88.5 → 89
- Cheapest variable tariff£1,584.42 → £1,805.29
- Cheapest fixed tariffnow available (£1,563.27)
- Cheapest tariff£1,584.42 → £1,563.27
- Cheapest tariff exit fee£0 → £100
- Cheapest tariff termvariable → 15 months
- Cheapest fixed tariff exit feenow available (£100)
- Cheapest fixed tariff termnow available (15 months)
- Tariff count1 → 3
- Fixed tariffs available0 → 2
- Shortest fixed termnow available (13 months)
- Longest fixed termnow available (15 months)
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Written by
Rob Gibbs
Hi, I'm Rob, and I run Energy-Review.co.uk. I initially started this project in 2018 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 have spent 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.