EDF Energy So Energy (September 2026)
Overview
There is no single best choice: compare price, service, app and green-energy evidence separately.
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Tariffs and pricing
Annual estimates use the stored consumption assumptions. Check current regional rates, terms and eligibility before switching.
Customer reviews
Each review service uses its own method and scale, so the measures below should be read separately.
App experience
App-store scores are shown by platform. No winner is declared where either ratings sample is missing or too small.
Service and support
Only like-for-like service measures with data for both suppliers are ranked.
Complaints and performance
Complaint figures are shown with each supplier’s reporting period. No winner is declared when periods differ or one figure is missing.
Green energy
Published fuel-mix figures are shown only where both a source URL and reporting period are present in the stored data.
Our verdict
| If you care most about | Choose |
|---|---|
| The lowest annual cost on our assumptions | So Energy |
| Overall customer service | EDF Energy |
| A well-rated mobile app | So Energy |
| A greener fuel mix | So Energy |
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 £1,611 / year
- 4.8 Trustpilot from 251,360 reviews
- iOS app rated 4.6 out of 5
- 86% of emails answered within 2 days
- 11% of Google Play ratings are negative
- Cheapest variable tariff at £1,508 / year
- 4.5 Trustpilot from 30,767 reviews
- iOS app rated 4.7 out of 5
- 91% of emails answered within 2 days
- Cheapest overall tariff carries a £190 exit fee
Frequently asked questions
Which is cheaper, EDF Energy or So Energy?
On the stored annual-cost assumptions, EDF Energy is £1,611 and So Energy is £1,508. So Energy is lower by about £103 a year.
Can EDF Energy and So Energy complaint rates be compared directly?
Yes. Both figures cover Q2 2026: EDF Energy reports 965 complaints per 100,000 customers and So Energy reports 1474.
Which supplier leads on customer service?
On the comparable customer-service measure used in the decision table, EDF Energy leads.
Which supplier has the better app evidence?
On the comparable app measure used in the decision table, So Energy leads.
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?
On the comparable green-energy measure used in the decision table, So Energy leads. This row is based on published fuel-mix percentages.
Which is better overall, EDF Energy or So 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, EDF Energy's iOS app days since last update rose from 6 to 13, So Energy's iOS sampled neutral reviews rose from 0 to 1, and EDF Energy's play store days since last update rose from 7 to 14. There were 26 other data changes this month — see the full changelog below for details.
Data changes this month (35)
EDF Energy
- Trustpilot reviews243,334 → 251,360
- iOS app ratings count185,000 → 187,000
- iOS app days since last update6 → 13
- iOS sampled reviews avg stars2 → 2.33
- Play Store rating4.4256063 → 4.3837585
- Play Store ratings count50,315 → 51,073
- Play Store days since last update7 → 14
- Play Store positive ratings %86.3 → 85.2
- Play Store negative ratings %9.8 → 10.6
- Play Store neutral ratings %3.9 → 4.2
- Play Store net-positive %76.5 → 74.6
- Cheapest variable tariff£1,754.76 → £1,610.88
- Cheapest fixed tariff£1,824.37 → £1,691.28
- Cheapest tariff£1,754.76 → £1,610.88
- Cheapest tariff exit fee£50 → £0
- Cheapest fixed tariff exit fee£150 → £200
- Tariff count4 → 3
- Variable tariffs available2 → 1
So Energy
- Trustpilot reviews30,220 → 30,767
- Trustpilot negative reviews replied %100 → 99
- iOS app ratings count197 → 225
- iOS app days since last update45 → 75
- iOS sampled reviews avg stars3.67 → 3.75
- iOS sampled neutral reviews0 → 1
- Play Store rating4.62 → 4.64
- Play Store ratings count127 → 138
- Play Store days since last update46 → 76
- Play Store positive ratings %92 → 91.9
- Play Store negative ratings %3.2 → 2.2
- Play Store neutral ratings %4.8 → 5.9
- Play Store net-positive %88.8 → 89.7
- Avg social media response time351 → no longer available
- Cheapest variable tariff£1,687.08 → £1,508.13
- Cheapest fixed tariff£1,828.88 → £1,734.74
- Cheapest tariff£1,687.08 → £1,508.13
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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.