E.ON Next Tulo Energy (September 2026)
Overview
There is no single best choice: compare price, service, app and green-energy evidence separately.
About E.ON Next and Tulo Energy
Who are E.ON Next?
E.ON Next is the retail brand of E.ON UK and is one of the UK's largest domestic energy suppliers. It offers a wide range of tariffs and gives customers a dedicated team of energy specialists for support. It also gained the Uswitch Flex Accreditation for 2026, which recognises suppliers that reward customers for moving their energy use to off-peak times.
Products & services
Awards & recognition
Who are Tulo Energy?
Tulo Energy is the trading name of Square1 Energy Limited, a smaller, independent UK energy supplier. The company was set up in 2017 and started taking on customers in 2019. Tulo Energy focuses on simplicity, clear pricing, and UK-based customer support. What sets it apart is its promise to avoid jargon and hidden fees. The supplier manages most of its customer support online, offering a web portal and a mobile app where users can submit meter readings, track their energy use, and manage their bills. Customers can also reach the support team through email, live chat, or phone.
Products & services
Use our referral link, and we'll both get £50 credit once your switch is complete.
Existing customer? Find out how you can benefit too. T&Cs apply (only one switching offer per household)
Tariffs and pricing
E.ON Next currently provides the lower-priced overall deal. Its most affordable plan is the Next Fixed 24m Exclusive v11, which costs £1,510 a year on a 24-month contract and carries a £200 total exit fee. Tulo Energy's lowest-priced option is the Tulo Vari-One standard variable tariff at £1,611 a year. This makes E.ON Next cheaper by £101 a year, or approximately £8 a month.
Households seeking a variable rate will find E.ON Next cheaper by £50 a year. The Next Pledge Tracker 12m v12 tariff costs £1,560 a year, compared to £1,611 a year for Tulo Energy's standard variable tariff. However, E.ON Next's tracker requires a 12-month term and includes a £50 exit fee, while Tulo Energy's variable plan has no fixed term and waives exit fees.
Additionally, E.ON Next supplies several fixed deals, whereas our comparison data currently shows only a variable tariff for Tulo Energy.
| Metric | E.ON Next | Tulo Energy |
|---|---|---|
| Cheapest tariff exit fee | £200 | £0 |
E.ON Next and Tulo Energy: Tariff Options
E.ON Next
E.ON Next offers a wide range of energy plans. This includes standard variable and fixed options, as well as specialist tariffs for electric vehicle owners, heat pump users, and homes with solar batteries.
Tulo Energy
Tulo Energy focuses on a simple product range and avoids complex tariff structures, offering a flexible standard variable option for households.
Customer reviews
Both suppliers hold high Trustpilot ratings, although E.ON Next has a significantly larger review base. Tulo Energy scores 4.6 out of 5 from 822 reviews, with 78% of users awarding it five stars. E.ON Next holds a 4.5 out of 5 rating across more than 225,000 reviews, where 75% give five stars and 9% give one star. Data shows E.ON Next replies to 99% of its negative reviews.
Feedback from E.ON Next customers frequently highlights helpful staff, punctual engineers, and a straightforward switching process, though some report concerns regarding rising costs and occasional communication delays. Tulo Energy users often mention an efficient support team, noting that queries are resolved quickly without automated loops. They also indicate reliable billing and a straightforward setup process.
In independent assessments, E.ON Next receives a Which? customer score of 66 out of 100. It achieves 8 out of 10 for smart meters, 8 out of 15 for complaints, and 9 out of 10 for help for those who need it. Its ratings for customer service and value for money are lower, at 2 out of 5. Tulo Energy does not currently hold a Which? rating.
App quality and features
E.ON Next provides an Android app scoring 4.3 out of 5 on the Google Play Store, based on over 16,000 ratings and more than a million installs. Recent updates indicate active maintenance. Our current data does not include an iOS App Store rating for E.ON Next.
Tulo Energy also offers a mobile app, though its user base is currently too small for a direct comparison. It holds a 5.0 out of 5 rating on the App Store from 2 ratings, and 3.1 out of 5 on the Google Play Store from 8 ratings. The iOS version received a recent update adding smart insights, whereas the Android app has not been updated in nearly a year.
Customer service and support
Average wait: 2.1 min
Hours: Mon–Thu 9am–5pm, Fri 9am–4pm, closed Saturday, closed Sunday
Replies: 91% within 2 days
Hours: 24/7
E.ON Next ranks 3rd in the latest Citizens Advice data, achieving an overall score of 3.71 out of 5. Customers contacting the supplier by phone experience an average call centre wait time of 2 minutes 3 seconds, and 90.7% of emails receive a response within two days. Additionally, E.ON Next has formal vulnerability commitments registered with Citizens Advice.
Tulo Energy does not currently hold a Citizens Advice score or rank, and data regarding its call wait times and email response rates is unavailable. For payment and contact options, E.ON Next accepts Direct Debit, Cash/Cheque, and Prepayment. Its phone lines operate Monday to Thursday from 9am to 5pm, and Friday from 9am to 4pm, remaining closed on weekends.
Complaints and performance
E.ON Next has complaints data for the second quarter of 2026. Tulo Energy does not have any complaints data available, so we cannot compare the two suppliers directly.
In Q2 2026, E.ON Next received 760 complaints for every 100,000 customers. It fixed 49.61% of these by the end of the next working day, and 89.69% within eight weeks.
Main reasons for complaints
The most common reason customers complained to E.ON Next was customer service, which made up 32.28% of cases. Other common issues included payments (12.16%) and general billing and meter reading issues (11.19%). Debt and debt-related disconnections caused 10.40% of complaints, and smart billing and meter reading issues accounted for 7.02%.
Green Energy Comparison
E.ON Next
E.ON Next supplies a mostly renewable mix, with some fossil fuels and a small amount of nuclear. The supplier also supports green home upgrades by offering discounts on heat pumps, electric vehicle chargers, solar panels, and home batteries. It partners with the Woodland Trust, pledging £500,000 over three years to help restore ancient woodlands, and makes a one-off donation when customers sign up for a fixed tariff. It also offers a specific green tariff backed by UK wind power.
Tulo Energy
Tulo Energy publishes a fuel-mix disclosure. For 1 April 2024 to 31 March 2025, it reported that 0.3% of the electricity it supplied came from renewables.[1]
Our verdict
| If you care most about | Choose |
|---|---|
| The lowest annual cost on our assumptions | E.ON Next |
There is no single best choice: compare price, service, app and green-energy evidence separately.
Use the decision table to match the available evidence to the factors that matter most to your household.
- Cheapest variable tariff at £1,560 / year
- 4.5 Trustpilot from 225,716 reviews
- Top-3 Citizens Advice ranking
- 91% of emails answered within 2 days
- Cheapest overall tariff carries a £200 exit fee
- 14% of Google Play ratings are negative
- Cheapest variable tariff at £1,611 / year
- 4.6 Trustpilot from 822 reviews
- 38% of Google Play ratings are negative
Frequently asked questions
Which is cheaper, E.ON Next or Tulo Energy?
On the stored annual-cost assumptions, E.ON Next is £1,510 and Tulo Energy is £1,611. E.ON Next is lower by about £101 a year.
Can E.ON Next and Tulo Energy complaint rates be compared directly?
No direct complaint-rate winner is declared because E.ON Next and Tulo Energy do not both have figures for the same stated reporting period.
Which supplier leads on customer service?
The supplied data does not support a like-for-like customer-service winner.
Which supplier has the better app evidence?
The supplied data does not support a like-for-like app winner.
Do tariff eligibility rules matter?
Yes. Specialist, time-of-use, EV, heat-pump and export tariffs can have equipment, meter or account requirements. Check the current supplier terms before applying.
Which supplier has the greener evidence?
The supplied data does not support a like-for-like green-energy winner. This row is based on published fuel-mix percentages.
Which is better overall, E.ON Next or Tulo Energy?
There is no single overall winner in this repaired draft. Price, service, app and green-energy evidence are kept as separate choices in the decision table.
When was this comparison updated?
The structured source payload is for September 2026.
What changed this month
This month, E.ON Next's iOS app updates in last 90 days fell from 3 to 0, E.ON Next's iOS sampled neutral reviews fell from 1 to 0, and Tulo Energy's iOS app days since last update fell from 51 to 30. There were 21 other data changes this month — see the full changelog below for details.
Data changes this month (26)
E.ON Next
- Trustpilot reviews219,212 → 225,716
- Trustpilot 5-star %74 → 75
- Trustpilot 4-star %12 → 11
- iOS app rating4.8 → no longer available
- iOS app ratings count49,000 → no longer available
- iOS app days since last update4 → no longer available
- iOS app updates in last 90 days3 → 0
- iOS sampled reviews avg stars3 → no longer available
- iOS sampled neutral reviews1 → 0
- Play Store rating4.324643 → 4.340909
- Play Store ratings count16,070 → 16,278
- Play Store days since last update5 → 4
- Play Store positive ratings %82.6 → 83.1
- Play Store negative ratings %14.2 → 13.8
- Play Store net-positive %68.4 → 69.3
- Cheapest variable tariff£1,747 → £1,560.38
- Cheapest fixed tariff£1,745.58 → £1,509.55
- Cheapest tariff£1,745.58 → £1,509.55
- Tariff count5 → 6
- Fixed tariffs available3 → 4
Tulo Energy
- Trustpilot reviews814 → 822
- Trustpilot negative reviews replied %0 → no longer available
- iOS app days since last update51 → 30
- Play Store days since last update332 → 362
- Cheapest variable tariff£1,804.78 → £1,610.84
- Cheapest tariff£1,804.78 → £1,610.84
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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.