Octopus Energy vs E.ON Next Energy Ltd: most-reported complaints compared
Most-reported issues at Octopus Energy and E.ON Next Energy Ltd, according to reviewers on Trustpilot — classified by our automated reader and backed by verbatim quotes from distinct reviews. This is a side-by-side of what reviewers report, not a score, rating or recommendation for either company.
Octopus Energy
TrustScore 4.8 · 876,929 reviews on Trustpilot.
3,669 reviews analysed, 2026-06-15 to 2026-09-27.
Complaint rate (recent window): 5%
97% of negative reviews get a company reply.
“Octopus have incorrectly switched our supply to another company, and attempted to charge my wife and I over £5000 of energy that we didn’t use.”
E.ON Next Energy Ltd
TrustScore 4.5 · 234,233 reviews on Trustpilot.
3,507 reviews analysed, 2026-07-04 to 2026-09-26.
Complaint rate (recent window): 12%
100% of negative reviews get a company reply.
“Took them 6 months and utterly unhelpful the whole way blaming everyone apart from themselves.”
Reported on both
Issues with an evidenced category (at least two verbatim quotes) on both sides.
| Issue | Octopus Energy | E.ON Next Energy Ltd |
|---|---|---|
| Support unhelpful | 42% | 31% |
| Billing errors | 28% | 19% |
| Support unreachable | 17% | 11% |
| Account/app problems | 10% | 9% |
| Overcharging | 6% | 12% |
Method: reviews are classified into a fixed complaint taxonomy by an automated reader; every category shown is backed by at least two verbatim quotes from distinct reviews. Figures are census classifications, not official statistics, and reflect what reviewers reported — not findings of wrongdoing by either company. Not affiliated with, endorsed by, or sponsored by Trustpilot A/S, Octopus Energy or E.ON Next Energy Ltd.