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Energy suppliers: Which? Recommended Providers
The accolade of Which? Recommended Provider for energy is only awarded to the companies that we’re confident meet the highest standards and are well liked by those who use them.
It’s not easy to achieve - if no companies live up to our high standards, we’re not afraid to leave the industry empty-handed.
Read on to find out which energy firms are Which? Recommended Providers for energy in 2025 and how we assess companies for the qualification.
Which? Recommended Provider for energy 2025
Three companies achieved the coveted Which? Recommended Provider (WRP) status in 2025. This is only the second time so many firms have made the grade. They are:
- Octopus Energy
- Utility Warehouse
- 100Green
WRPs must make it through our tough assessments, which include an analysis of their practices and what customers really think of them. Find out more below.
Octopus Energy has been a WRP for eight years running. This is the first time Utility Warehouse and 100Green have been named WRPs.
These three firms achieved the highest scores in our customer survey and all three received a five star rating for overall customer service.
Here's a snapshot of some key details:
| Criteria | Octopus Energy | Utility Warehouse | 100Green |
| Total score | 74% | 73% | 70% |
| Customer score | 78% | 73% | 76% |
| Which? assessment score | 70% | 73% | 65% |
Total score is a combination of customer score and Which? assessment score. Customer score is based on an online survey of 11,984 energy customers among the general public in Great Britain in September-October 2024. Sample sizes were Octopus Energy (2,469); Utility Warehouse (427); 100Green (191). Which? assessment score is based on complaints performance (30%), contacting your supplier (25%) support for those who need it (25%), performance against 2023 smart meter targets (10%) and switching performance (10%). Assessment carried out in September-November 2024.
Find out more about each company in our dedicated reviews of Octopus Energy, Utility Warehouse and 100Green.
Which? Recommended Provider criteria
Our energy satisfaction survey is the first piece in the puzzle for aspiring Which? Recommended Providers. Companies must be among the highest scorers, based on feedback from their customers.
See our full energy survey results to compare energy companies.
In addition to our customer satisfaction survey, we also carry out detailed behind-the-scenes analysis of energy companies' practices. We award Which? Recommended Provider (WRP) status to those companies which pass our criteria, so we're confident that they're the best of the best and won't let you down.
We also continually review and improve our criteria to make sure they're focused on what's most important to customers.
To become a Which? Recommended Provider, an energy supplier must:
- Be one of the top-ranked companies as rated by their customers, with a customer score of at least 70%.
- Have practices that we think are in the best interest of customers. We scored energy companies against a set of 17 criteria across five key areas: how well they provide methods of communication to customers, how they support customers who need it, how they deal with complaints, how they performed against their recent smart meter targets and how well they handle customers switching. Which? Recommended Providers must score above average in this assessment.
Previous energy WRPs
Ovo Energy, So Energy, Ecotricity and E (Gas & Electricity) are the only other energy firms to have previously been Which? Recommended Providers.
Ecotricity and E were WRPs in 2024 and So Energy was a WRP in 2020. Ovo Energy received the qualification in 2016, but lost it when it raised its prices. Ovo Energy was also our very first WRP in 2015.
Pure Planet was a 2021 WRP, but ceased trading in October 2021. Flow Energy was a 2016 WRP but its customers were moved to Octopus Energy when it ceased trading in 2019.
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