Insite Energy vs ScottishPower: most-reported complaints compared
Most-reported issues at Insite Energy and ScottishPower, 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.
Insite Energy
TrustScore 4.7 · 4,394 reviews on Trustpilot.
314 reviews analysed, 2025-10-03 to 2026-09-17.
Complaint rate (recent window): 5%
98% of negative reviews get a company reply.
“Email: Replies require a ridiculous 9 business days, rendering this channel useless for urgent issues.”
ScottishPower
TrustScore 4.4 · 208,522 reviews on Trustpilot.
3,603 reviews analysed, 2026-05-24 to 2026-09-27.
Complaint rate (recent window): 9%
93% of negative reviews get a company reply.
“a debt collector turning up at our door”
Reported on both
Issues with an evidenced category (at least two verbatim quotes) on both sides.
| Issue | Insite Energy | ScottishPower |
|---|---|---|
| Support unreachable | 38% | 15% |
| Support unhelpful | 36% | 37% |
| Billing errors | 22% | 22% |
| Account/app problems | 14% | 16% |
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, Insite Energy or ScottishPower.