Waseit study · UK · collected 2026-07-31
Which plumbers do AI assistants recommend in Cardiff?
We asked ChatGPT, Gemini and Perplexity 6 real buying questions about plumbers in Cardiff - the way customers actually ask. Every answer named specific businesses: 35 names came back for this trade in this city.
The names the assistants cite most
- 1.Checkatradecited 3 times · by gemini, perplexityplatform, not a local business
- 2.Why they are recommendedcited 2 times · by gemini
- 3.RM Plumbing & Electricalcited 2 times · by perplexity
- 4.Cardiff and Caerphilly Plumberscited 2 times · by perplexity
- 5.Cardiff Plumbing & Heatingcited 1 time · by openai
- 6.Plumbase Cardiffcited 1 time · by openai
- 7.Lloyds Plumbing Servicescited 1 time · by openai
- 8.Graham Plumbers Merchantcited 1 time · by openai
Counts are citations across our sampled answers for this trade and city, collected 2026-07-31 via the assistants' APIs. Answers vary between runs - across the whole study, assistants agreed with each other on only 3% of names. A snapshot, honestly labelled, not a permanent ranking.
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Full dataset and method: the 2026 UK study (1464 answers, 244 trade×city cells) · our methodology