100Green EDF Energy (August 2026)
Overview
100Green offers stronger customer service scores and a cheaper fixed deal, though EDF Energy ranks higher for app users and those wanting a variable tariff.
100Green leads this comparison due to its strong customer service scores and a lower-priced fixed tariff. However, EDF Energy may suit households looking for a cheaper variable option or higher-rated mobile apps.
About 100Green and EDF Energy
Who is 100Green?
100Green is an independent UK energy supplier based in Hertfordshire. Set up in 2001 and previously known as Green Energy UK, it operates as a premium supplier focusing entirely on green energy for households. Because of its higher costs to support renewable generation, it holds a special exemption from the Ofgem price cap.
Who are EDF Energy?
EDF Energy is the British arm of the French state-owned energy company, Électricité de France. Formed in 2002, it is now one of the UK's largest domestic energy suppliers and a major generator of electricity. A key difference is its scale as a generator of zero-carbon electricity, running several nuclear power stations across the country and leading large infrastructure projects.
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Tariffs and pricing
100Green offers the lowest overall price in this comparison. Its Exclusive Spring 100% Green 12M August 27 fixed tariff costs £1,749 a year, which is £6 cheaper than EDF Energy's most affordable deal, the Simply Tracker Sep27 at £1,755 a year. While 100Green requires a 12-month commitment, it does not charge exit fees. In contrast, EDF Energy's variable tariff has a 0-month term but includes a £50 exit fee.
For households seeking a fixed deal, 100Green is £75 a year cheaper than EDF Energy. EDF Energy's lowest-priced fixed option costs £1,824 a year, requires a 24-month term, and carries a £150 exit fee. Conversely, EDF Energy is the cheaper choice for variable deals. Its Simply Tracker Sep27 tariff costs £1,755 a year, undercutting 100Green's Sparkling SVT option by £221 annually.
100Green and EDF Energy: Tariff Options
100Green
100Green offers a focused range of household energy plans, including standard variable and fixed options. It also has specialist tariffs for electric vehicle drivers and homes with solar panels.
EDF Energy
EDF Energy has a wide selection of energy plans, covering standard variable and fixed deals alongside tracker options. The supplier also offers specialist tariffs designed for electric vehicle owners and households that generate their own renewable energy.
Customer reviews
EDF Energy holds a Trustpilot rating of 4.8 out of 5 across 243,334 reviews, compared to 100Green's 4.6 out of 5 from 1,539 reviews. Five-star ratings make up 83% of EDF Energy's feedback, while 100Green receives five stars in 74% of its reviews. Both suppliers have a 7% share of one-star ratings.
Reviewers for 100Green frequently mention helpful staff, highlighting quick response times and an understanding approach. Similarly, EDF Energy customers note the professionalism and politeness of agents, alongside prompt replies that simplify account management.
In the annual Which? survey, 100Green achieves an overall score of 72, ahead of EDF Energy at 58. 100Green receives 4 out of 5 for customer service and 9 out of 12 for contacting your supplier. In those same categories, EDF Energy scores 2 out of 5 and 3 out of 12. However, EDF Energy performs better for helping those who need it, scoring 9 out of 10 compared to 100Green's 4 out of 10. Both suppliers receive 1 out of 5 for the switching process.
App quality and features
EDF Energy receives higher ratings for its mobile apps. The iOS version holds a 4.6 out of 5 rating from 185,000 reviews, and the Android app scores 4.4 out of 5 from 50,315 reviews. Recent update notes for both platforms highlight a new design, quick actions, and easier access to the Priority Services Register.
100Green's apps receive lower scores, although these are based on a smaller sample size. The iOS app is rated 1.1 out of 5 from 21 reviews, while the Android version scores 1.2 out of 5 from 30 reviews. Recent iOS feedback for 100Green indicates that users find the app basic and difficult to navigate, with several noting login issues.
Customer service and support
100Green places 1st overall in the Citizens Advice table, scoring 4.33 out of 5. EDF Energy ranks 11th with a score of 2.9 out of 5. Both suppliers maintain formal vulnerability commitments registered with Citizens Advice.
Call wait times differ notably between the two providers. 100Green customers wait an average of 7 seconds to speak to an agent, while EDF Energy customers wait 2 minutes 46 seconds. 100Green is also slightly faster at handling written queries, responding to 90.9% of emails within two days, compared to 85.6% for EDF Energy.
100Green operates its contact channels from 8am to 8pm on weekdays, and 9am to 1pm on weekends. EDF Energy is open from 8am to 6pm Monday to Thursday, and 8am to 4pm on Fridays, but remains closed on Saturdays and Sundays.
Complaints and performance
In the first quarter of 2026, 100Green received 144 complaints for every 100,000 customers. Data showing how fast the supplier resolved these complaints was not available. 100Green also did not share the main reasons why its customers complained.
Green Energy Comparison
100Green
100Green supplies a 100% renewable electricity mix. It buys its electricity directly from over 3,000 independent UK renewable generators. For gas, it supplies 100% biomethane produced from farm and food waste, rather than relying on carbon offsetting to balance out fossil fuel use. This means customers get energy that comes entirely from renewable sources.
EDF Energy
EDF Energy supplies an electricity mix that is largely nuclear, with some fossil fuels and renewables. The supplier focuses heavily on generating zero-carbon electricity through its nuclear fleet rather than relying solely on renewable sources. It backs some of its tariffs with zero-carbon nuclear electricity and invests in building new nuclear and renewable energy sites in the UK to help reach net zero targets.
Our verdict
| If you care most about | Choose |
|---|---|
| The lowest annual cost on our assumptions | 100Green |
| Overall customer service | 100Green |
| A well-rated mobile app | EDF Energy |
| A greener fuel mix | 100Green |
100Green offers stronger customer service scores and a cheaper fixed deal, though EDF Energy ranks higher for app users and those wanting a variable tariff.
100Green achieves higher customer service scores and provides a lower-priced fixed deal, while EDF Energy may appeal more to app users and households seeking a variable tariff.
Households prioritising fast call answering times and a fixed deal with no exit fees may find 100Green suitable. Alternatively, EDF Energy could be a better fit for those who prefer managing their account via a mobile app or who want a lower-priced variable tariff.
- Places 1st in the Citizens Advice ratings
- Average call wait time of 7 seconds
- Lower-priced fixed tariff with no exit fees
- Supplies 100% renewable electricity and green gas
- Low app ratings on both iOS and Android
- Standard variable tariff is more expensive
- Higher-rated apps on both major platforms
- High volume of positive Trustpilot reviews
- Lower-priced tracker tariff
- Ranks lower in the Citizens Advice table
- Longer average call wait times
- Its lowest-priced fixed deal carries a £150 exit fee
Frequently asked questions
Which supplier is better overall, 100Green or EDF Energy?
100Green edges ahead based on the data we reviewed. It ranks first with Citizens Advice, answers calls in just 7 seconds, and currently offers a cheaper fixed tariff. However, EDF Energy is a strong alternative if you prefer higher-rated mobile apps or want a cheaper variable tariff.
Does 100Green or EDF Energy offer cheaper energy tariffs?
100Green offers the cheaper fixed tariff, costing £1,749 a year with no exit fees, which is £75 cheaper than EDF Energy's most affordable fixed deal. However, EDF Energy is much cheaper if you want a variable tariff, undercutting 100Green by £221 a year.
Do customers prefer 100Green or EDF Energy?
Both suppliers perform well on Trustpilot. EDF Energy holds a 4.8-star rating from 243,334 reviews, while 100Green scores 4.6 stars from 1,539 reviews. However, 100Green performs better in the annual Which? survey, scoring 72 compared to EDF Energy's 58.
Are the 100Green and EDF Energy apps easy to use?
EDF Energy offers much higher-rated mobile apps, scoring 4.6 out of 5 on the App Store and 4.4 on Google Play. In contrast, 100Green's apps receive low scores of 1.1 and 1.2 respectively, with users frequently complaining about basic design and login issues, though these scores are based on a small number of reviews.
Which supplier is faster at answering customer calls?
100Green answers calls faster, with an average call centre wait time of just 7 seconds. EDF Energy customers wait an average of 2 minutes and 46 seconds to speak to an agent. Both suppliers answer the vast majority of customer emails within two days.
Should I switch to 100Green or EDF Energy?
If you value fast customer service and want a well-priced fixed deal with no exit fees, 100Green is the better option. However, if you prefer managing your account through a reliable mobile app or want a cheaper variable tariff, EDF Energy is the stronger choice.
Do 100Green and EDF Energy charge exit fees?
100Green's cheapest fixed tariff comes with no exit fees, meaning you can leave without penalty. EDF Energy's cheapest fixed deal carries a £150 exit fee, and even its variable Simply Tracker Sep27 tariff includes a £50 exit fee.
Are 100Green and EDF Energy open on weekends?
100Green is open on weekends, with phone lines available from 9am to 1pm on both Saturday and Sunday. EDF Energy's customer service lines are closed on weekends, operating only from Monday to Friday.
Do 100Green and EDF Energy offer support for vulnerable customers?
Yes, both suppliers have formal vulnerability commitments registered with Citizens Advice. EDF Energy also scores very highly in the Which? survey for helping customers who need it, achieving 9 out of 10 in that category.
How do 100Green and EDF Energy perform in the Which? survey?
100Green scores 72 overall in the Which? survey, achieving 4 out of 5 for customer service. EDF Energy scores 58 overall and gets 2 out of 5 for customer service, though it scores an impressive 9 out of 10 for helping those who need it.
What changed this month
This month, 100Green's play store days since last update rose from 15 to 38, 100Green's iOS app updates in last 90 days rose from 0 to 3, and EDF Energy's iOS app updates in last 90 days rose from 0 to 3. There were 19 other data changes this month — see the full changelog below for details.
Data changes this month (26)
100Green
- Trustpilot reviews1,511 → 1,539
- iOS app ratingnow available (1.1)
- iOS app ratings countnow available (21)
- iOS app days since last updatenow available (38)
- iOS app updates in last 90 days0 → 3
- iOS sampled reviews avg starsnow available (1)
- iOS sampled negative reviews0 → 3
- Play Store days since last update15 → 38
- Avg social media response time55 → no longer available
- Cheapest fixed tariff£1,671.16 → £1,748.8
- Cheapest tariff£1,671.16 → £1,748.8
EDF Energy
- Trustpilot reviews234,962 → 243,334
- iOS app ratings count182,000 → 185,000
- iOS app days since last update754 → 6
- iOS app updates in last 90 days0 → 3
- Play Store rating4.4540496 → 4.4256063
- Play Store ratings count49,305 → 50,315
- Play Store days since last update20 → 7
- Play Store positive ratings %87.2 → 86.3
- Play Store negative ratings %9.1 → 9.8
- Play Store neutral ratings %3.7 → 3.9
- Play Store net-positive %78.1 → 76.5
- Cheapest fixed tariff£1,692.77 → £1,824.37
- Cheapest tariff£1,692.77 → £1,754.76
- Cheapest tariff exit fee£150 → £50
- Cheapest tariff term24 months → 0 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.