Best plumbers in San Francisco, CA, according to AI
We ask ChatGPT, Claude, Gemini, Perplexity and 8 more AI assistants the questions real customers ask — like “Who are the best plumbers in San Francisco, CA?” — and publish who they name. Here is this month's answer, ranked by how often they name each business.
As of October 1, 2026, Ace Plumbing & Rooter is the plumber AI assistants most recommend in San Francisco, CA, named by 5 of the 10 assistants that answered (12 asked). Magic Plumbing and Discount Plumbing Rooter Inc. rank next.
AI's top plumbers in San Francisco for October 2026
Every business below was named by the AI assistants themselves when we asked for plumbers in San Francisco, CA. The more assistants that name a business — and the more often — the higher it ranks.
Ace Plumbing & Rooteraceplumbingandrooter.com
Named by 5 of 10 AIs · 10 times
ChatGPTClaudeGeminiPerplexitySiri
Open AI profile
#2
Magic Plumbingmagicplumbing.com
Named by 4 of 10 AIs · 7 times
ClaudeGeminiMeta AISiri
Open AI profile
#3
Discount Plumbing Rooter Inc.discountplumbingrooterinc.com
Named by 4 of 10 AIs · 5 times
ChatGPTClaudeGeminiSiri
Open AI profile
- RankWho the AIs name most often, and most in agreement.
- AIs that name itHow many of the 10 assistants that answered put this business in their answer. We asked all 12; 2 gave no usable answer for this city and category this month.
- vs last monthUp, down or new since the previous monthly edition.
Every plumber AI named (18)
Tap a name for that business's AI profile: rank history, which assistants name it, and who's just ahead.| Rank | Business & the AIs that name it | AIs that name it | Times named | vs last month |
|---|---|---|---|---|
| 1 |
ChatGPTClaudeGeminiPerplexitySiri
|
5 of 10 | 10 | same |
| 2 |
ClaudeGeminiMeta AISiri
|
4 of 10 | 7 | ▲ 2 places up |
| 3 |
ChatGPTClaudeGeminiSiri
|
4 of 10 | 5 | ▼ 1 places down |
| 4 |
DeepSeekGrokMistralPerplexity
|
4 of 10 | 5 | ▲ 3 places up |
| 5 |
GeminiMeta AISiri
|
3 of 10 | 5 | ▲ 9 places up |
| 6 |
ClaudePerplexity
|
2 of 10 | 5 | ▲ 3 places up |
| 7 |
ClaudeMeta AIMistral
|
3 of 10 | 4 | ▲ 14 places up |
| 8 |
DeepSeekGrokMistral
|
3 of 10 | 4 | new |
| 9 |
ChatGPTClaude
|
2 of 10 | 4 | ▼ 4 places down |
| 10 |
DeepSeekMeta AI
|
2 of 10 | 3 | new |
| 11 |
Galvanized Plumbing & Heating galvanizedplumbing.com Mistral
|
1 of 10 | 3 | new |
| 12 |
Atlas Plumbing & Rooter atlasplumbingandrooter.com ChatGPTMeta AI
|
2 of 10 | 2 | ▲ 6 places up |
| 13 |
ChatGPTDeepSeek
|
2 of 10 | 2 | ▲ 9 places up |
| 14 |
Cabrillo Plumbing, Heating and Cooling ClaudeGemini
|
2 of 10 | 2 | ▲ 9 places up |
| 15 |
Heise’s Plumbing heisesplumbing.com ChatGPTPerplexity
|
2 of 10 | 2 | ▼ 12 places down |
| 16 |
Fast Response Plumbing & Rooter Claude
|
1 of 10 | 2 | new |
| 17 |
George Salet Plumbing plumbingpro.com Claude
|
1 of 10 | 2 | ▼ 6 places down |
| 18 |
Whistle Plumbing Gemini
|
1 of 10 | 2 | new |
Asked the ways customers actually ask
The same assistants, the same week, three phrasings of one need — ranked separately. A business that wins “best” but loses “most affordable” is losing a different customer each time.
- 1Ace Plumbing & Rooter
- 2Magic Plumbing
- 3O'Grady Plumbing
- 4Advanced Plumbing & Drain
- 5Atlas Plumbing & Rooter
- 6Bay Area Plumbing Co.
28 sources the assistants read
Every site behind this month's answers, ranked by share of all citations, with how many assistants relied on each. Earning a mention on the pages near the top is what moves a ranking — and nothing on this page can be bought.
- 01 consumeraffairs.comDirectory & reviews 9.8% 2 of 10 assistants
- 02 expertise.comDirectory & reviews 7.3% 2 of 10 assistants
- 03 trustanalytica.org 4.9% 2 of 10 assistants
- 04 bestprosintown.comDirectory & reviews 4.9% 1 of 10 assistants
- 05 advancedplumbingsf.com 4.9% 1 of 10 assistants
-
06
aceplumbingandrooter.comRanked #1 · Ace Plumbing & Rooter
4.9%
1 of 10 assistants
- 07 local.yahoo.com 4.9% 1 of 10 assistants
- 08 yelp.comDirectory & reviews 4.9% 1 of 10 assistants
Show 17 more sourcesShow fewer
- 09 thumbtack.comDirectory & reviews 4.9% 1 of 10 assistants
-
10
rotorooter.comRanked #4 · Roto-Rooter
4.9%
1 of 10 assistants
- 11 serviceagent.ai 2.4% 1 of 10 assistants
- 12 diamondcertified.org 2.4% 1 of 10 assistants
- 13 discovercabrillo.com 2.4% 1 of 10 assistants
- 14 eplumbingsolutions.com 2.4% 1 of 10 assistants
- 15 atlasplumbingandrooter.comRanked #12 · Atlas Plumbing & Rooter 2.4% 1 of 10 assistants
- 16 plumbinginsf.com 2.4% 1 of 10 assistants
- 17 sfbayplumbing.com 2.4% 1 of 10 assistants
- 18 go.advancedplumbingsf.com 2.4% 1 of 10 assistants
- 19 homeguide.comDirectory & reviews 2.4% 1 of 10 assistants
- 20 buildzoom.com 2.4% 1 of 10 assistants
- 21 chosenrooter.com 2.4% 1 of 10 assistants
- 22 yellowpages.comDirectory & reviews 2.4% 1 of 10 assistants
-
23
mrrooter.comRanked #8 · Mr. Rooter
2.4%
1 of 10 assistants
- 24 checkbook.org 2.4% 1 of 10 assistants
- 25 angi.comDirectory & reviews 2.4% 1 of 10 assistants
+ 3 more sites cited less often, together 7.7% of citations.
No business can pay to be ranked · how this is measured
Is your business in this answer?
12 assistants answered “Who are the best plumbers in San Francisco, CA?” this month and named 18 plumbers in San Francisco, CA. Which side of that list you are on decides whether a customer asking that question ever hears your name.
On the list, and want to be higher?
Rank here is set by how many assistants repeat your name and which sources they read to decide it — the 25 sources above are the ones that shaped this answer. Our platform measures exactly that for one business: the same 12 assistants, daily instead of monthly, which of those sources you appear on and which you don't, and every fix tracked until the answer changes.
You're not on the list
Then for this question you were not in the answer at all — not ranked low, absent from the shortlist, with nothing to tell you it happened. That is the ordinary case: most plumbers in San Francisco, CA are never named. AI Pulse shows you what each assistant says about your business and what to change so it names you.
Common questions
Who is the best plumber in San Francisco, CA, according to AI?
As of October 1, 2026, Ace Plumbing & Rooter — named by 5 of the 10 AI assistants that answered (12 asked), 10 times in all. Magic Plumbing and Discount Plumbing Rooter Inc. rank next.
How many plumbers did AI assistants name in San Francisco, CA?
59 businesses were named across 36 answers from 10 assistants, on 3 phrasings of the question. 18 of them were named often enough to rank.
How often is this ranking updated?
Every month. This edition covers October 2026; the next one publishes in November 2026. Each business's move since the last edition is shown in the "vs last month" column.
How is this ranking measured?
Fixed, unbranded consumer questions — including "Who are the best plumbers in San Francisco, CA?" — are put to the same assistants every month. Named businesses are resolved to one entity, a name mentioned only once is dropped as unverifiable, and a cell publishes nothing until enough answers accumulate. No business can pay to appear or to rank higher.
The questions we ask
The prompt set is fixed and unbranded, so month-over-month movement means the assistants changed their answer — not that we changed the question.
- Who are the best plumbers in San Francisco, CA?
- I need a plumber in San Francisco, CA. Who do you recommend?
- Best affordable plumber near San Francisco?
More San Francisco rankings
Every category we track in San Francisco, CA, measured the same way.
Plumbers in other cities
Move up this list
This page measures a whole market once a month, for free. Our software measures a single business across the same 12 assistants daily — which ones name you, which sources they trust to decide it, what to fix next, and whether the answer actually moved.
AI Pulse: all 12 AI assistants, every feature, cancel anytime.