Plumbers in San Francisco that AI assistants recommend
We asked ChatGPT and Claude the four questions a buyer asks when looking for plumbers in San Francisco, three times each, in English, and counted who they named. These are the businesses named in two or more of the 24 answers.
Names are printed as the assistants wrote them. We have not checked that any of them is good, open, or real.
- Answers
- 24
- Businesses named
- 29
- Named only once
- 17
- Named by 2+ assistants
- 9 of 12
- Named again on a rerun
- 25%
Edition September 2026. Download the data
Asked for plumbers in San Francisco, ChatGPT and Claude most often named Mr. Rooter Plumbing of San Francisco (50% of answers), Plumbing Guys (46%) and Advanced Plumbing & Rooter (29%). Across 24 answers they named 29 different businesses, 17 of them only once. Each of four buyer questions was asked three times, in English, in September 2026.
The ranking
Share is the fraction of the 24 answers that named a business. The range under it is a 95% confidence interval: where two ranges overlap, the gap between those businesses could be chance.
| # | Business | Share | ChatGPT | Claude | Questions | Avg. position |
|---|---|---|---|---|---|---|
| 1 | Mr. Rooter Plumbing of San Francisco | 95%: 31 to 69% | 33% | 67% | 4 of 4 | 1.9 |
| 2 | Plumbing Guys | 95%: 28 to 65% | 33% | 58% | 3 of 4 | 1.8 |
| 3 | Advanced Plumbing & Rooter | 95%: 15 to 49% | 42% | 17% | 4 of 4 | 2.3 |
| 4 | Albert Nahman Services | 95%: 12 to 45% | 33% | 17% | 3 of 4 | 1.2 |
| 5 | Roto-Rooter Plumbing & Water Cleanup San Francisco | 95%: 9 to 41% | 25% | 17% | 3 of 4 | 1.8 |
| 6 | Heise's PlumbingAlso written Heise’s Plumbing | 95%: 4 to 31% | 25% | 0% | 2 of 4 | 1.3 |
| 7 | Ace Plumbing & Rooter | 95%: 4 to 31% | 8% | 17% | 1 of 4 | 2 |
| 8 | Benjamin Franklin Plumbing San FranciscoAlso written Benjamin Franklin Plumbing - San Francisco | 95%: 4 to 31% | 8% | 17% | 3 of 4 | 2.7 |
| 9 | Discount Plumbing Rooter | 95%: 2 to 26% | 17% | 0% | 2 of 4 | 2.5 |
| 10 | Discount Plumbing Rooter and Water HeaterAlso written Discount Plumbing Rooter & Water Heater | 95%: 2 to 26% | 8% | 8% | 2 of 4 | 2.5 |
| 11 | Roto-Rooter Plumbing & Water Cleanup of San Francisco | 95%: 2 to 26% | 8% | 8% | 2 of 4 | 2.5 |
| 12 | Mike Counsil Plumbing and Rooter | 95%: 2 to 26% | 0% | 17% | 1 of 4 | 3.5 |
Each assistant column is the share of that assistant's own answers. Questions counts how many of the four produced the name at least once; position is where it came in the answer's list, 1 being first. 17 more names came up in a single answer and are counted above but not listed.
What each assistant said
The same questions, the same number of times, and often different names. Each column is one assistant's top five from the ranking above, with the share of its own answers that named them.
| # | ChatGPT | Claude |
|---|---|---|
| 1 | Advanced Plumbing & Rooter42% | Mr. Rooter Plumbing of San Francisco67% |
| 2 | Mr. Rooter Plumbing of San Francisco33% | Plumbing Guys58% |
| 3 | Plumbing Guys33% | Advanced Plumbing & Rooter17% |
| 4 | Albert Nahman Services33% | Albert Nahman Services17% |
| 5 | Roto-Rooter Plumbing & Water Cleanup San Francisco25% | Roto-Rooter Plumbing & Water Cleanup San Francisco17% |
Named here? Put it on your site
Every business in the ranking was named in two or more answers. The badge says that and nothing more: no position, because the ranges above do not support one. It links back to this page, so anyone can check.
<a href="https://aigrow.gg/index/plumbers/san-francisco"><img src="https://aigrow.gg/badges/index/2026-09/plumbers/san-francisco.svg" width="312" height="100" alt="Named by AI assistants: Plumbers in San Francisco, AIGROW AI Visibility Index, September 2026"></a>The questions
Asked word for word, three times each, to every assistant through its API. The prompt is the one the free scan uses. No web search, no location and no chat history, so every answer starts from the same place.
- 1Who is the best plumber in San Francisco?
- 2I have a leaking pipe at home in San Francisco. Which plumbing company should I call?
- 3I need an emergency plumber in San Francisco tonight. Who would you recommend?
- 4Which plumber in San Francisco would you trust to replace a water heater?
How to read this page
- What it measures
- Which names these models produce when asked cold, from what they learned in training. It is not a review, a rating or our recommendation, and a business missing here may simply be one the models were never shown.
- Why the ranges matter
- 24 answers is a sample. Asked again next month, most shares will move by a few points; the ranges say how far they could move by chance alone.
- One business, several spellings
- Branches, legal suffixes and spellings of one business are merged, and the other spellings are printed under its name. Names that might be two businesses are kept apart.
- A name is wrong
- If a business here is closed, misnamed or yours and you want it removed, tell us. We correct or remove it when the page is next published.
Elsewhere in the Index
- Also in San Francisco
- DentistsLawyersAccountantsGymsReal estate agenciesRestaurants
Is your business on this list?
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Edition September 2026 · data under CC BY 4.0