Waseit study · US · collected 2026-09-13
Which plumbers do AI assistants recommend in Phoenix?
We asked ChatGPT and Gemini 4 real buying questions about plumbers in Phoenix - the way customers actually ask. 14 names came back for this trade in this city.
No name here is cited by more than one assistant: each of the 14 businesses found comes from a single engine. This is a field without consensus - being cited by one says nothing about the others.
The names the assistants cite most
- 1.Peoria Plumbingcited 2 times · by ChatGPT
- 2.Arizona Plumbing Servicescited 1 time · by ChatGPT
- 3.Schneider Plumbingcited 1 time · by ChatGPT
- 4.Johns Plumbingcited 1 time · by ChatGPT
- 5.The Plumbing & Drain Cocited 1 time · by ChatGPT
- 6.Roto-Rooter Plumbing & Water Cleanupcited 1 time · by ChatGPT
- 7.Simply Plumbcited 1 time · by ChatGPT
- 8.Cactus Plumbing and Aircited 1 time · by ChatGPT
Counts are citations across our sampled answers for this trade and city, collected 2026-09-13 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 labeled, not a permanent ranking.
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Full dataset and method: the 2026 US study (872 answers, 218 trade×city cells) · our methodology