San Francisco, CA · October 2026
Which plumbers in San Francisco do AI assistants recommend?
We asked ChatGPT, Gemini, Perplexity and Claude Who is the best plumber in San Francisco, CA?
3 times each and counted every plumber they named.
Last updated · 12 answers
- 19plumbers named
- 4named by 3 or more engines
- 44/100answer stability
What the answers show
- AI assistants named 19 different plumbers in San Francisco, but only 4 came up on three or more engines.
- Answers here are unstable. Asking the same assistant the same question three times often produced a different list (stability 44/100), so a single check of your visibility can mislead. ChatGPT varied most, at 12/100.
- Ace Plumbing & Rooter and Advanced Plumbing & Drain were named most often, in 6 of 12 answers each. Ace Plumbing & Rooter came up in 3 of 3 Gemini answers but 1 of 3 on ChatGPT.
- Of the directory and review sites, consumeraffairs.com was cited most, in 7 of 12 answers. That is where the assistants went to check plumbers in San Francisco.
Plumbers AI assistants named in San Francisco
| Plumber | ChatGPT | Gemini | Perplexity | Claude | Total |
|---|---|---|---|---|---|
| 1Ace Plumbing & Rooter | 1/3 | 3/3 | 0/3 | 2/3 | 6/12 |
| 2Advanced Plumbing & Drain | 2/3 | 3/3 | 0/3 | 1/3 | 6/12 |
| 3Cabrillo Plumbing, Heating and Cooling | 2/3 | 3/3 | 0/3 | 1/3 | 6/12 |
| 4Magic Plumbing | 1/3 | 3/3 | 0/3 | 2/3 | 6/12 |
| 5George Salet Plumbing | 1/3 | 0/3 | 0/3 | 2/3 | 3/12 |
| 6Genteel Plumbers | 0/3 | 0/3 | 3/3 | 0/3 | 3/12 |
| 7O'Grady Plumbing | 0/3 | 3/3 | 0/3 | 0/3 | 3/12 |
| 8Atlas Plumbing & Rooter | 1/3 | 1/3 | 0/3 | 0/3 | 2/12 |
| 9Fast Response Plumbing & Rooter | 0/3 | 0/3 | 2/3 | 0/3 | 2/12 |
| 10Heise's Plumbing | 2/3 | 0/3 | 0/3 | 0/3 | 2/12 |
Also named: 24-7 Rooter & Plumbing (1), Advanced Plumbing & Rooter (1), Albert Hall Plumbing (1), Albert Nahman Plumbing & Heating (1), Discount Plumbing San Francisco (1), Kenneth Asire Plumbing (1), Mr. Rooter Plumbing of San Francisco (1), One Source Plumbing & Rooter (1), Wizard Plumbing & Drain (1).
Sources AI assistants cited
The websites the engines linked to most often in these answers.
- consumeraffairs.com7 of 12 answers
- trustanalytica.org5 of 12 answers
- angi.com4 of 12 answers
- bestprosintown.com3 of 12 answers
- checkbook.org3 of 12 answers
Is your business in these answers?
Leolens asks ChatGPT, Gemini, Perplexity and Claude the questions your customers ask, every month, and shows whether they name you and whether what they say about you is true.
Plans start at $799 per month for one location. For plumbing businesses we write your question set with you first, and nothing is charged until it exists.
Why some plumbers show up and others don’t
Assistants recommend what they can find and cross-check. What tends to help:
- Show emergency availability where assistants look for it: 24/7 hours on your Google Business Profile, the same hours on your website, and a phone number a person answers.
- Keep your business name, address and phone number identical on Google, Yelp, Angi, the BBB and HomeAdvisor.
- Publish a page for each job type (water heaters, drain clearing, slab leaks, repiping) and each city you cover, with your license number and what a visit includes.
- Collect reviews that name the job and the neighborhood. "Replaced our water heater in San Francisco" gives an assistant more to work with than five stars alone.
Questions
Which plumbers in San Francisco do AI assistants recommend most often?
In October 2026, Ace Plumbing & Rooter was named in 6 of 12 answers from ChatGPT, Gemini, Perplexity and Claude, followed by Advanced Plumbing & Drain (6) and Cabrillo Plumbing, Heating and Cooling (6). The table above has the full count.
What is the best plumber in San Francisco, according to AI?
The assistants do not settle on one. Asked Who is the best plumber in San Francisco, CA?
3 times each, they named 19 different plumbers, and 4 came up on three or more engines. Which one an assistant suggests can change from one ask to the next.
Do AI assistants give the same answer every time?
No. Each assistant was asked the same question 3 times. On a 0–100 scale, where 100 means the same names every time, their answers scored 44 on average: ChatGPT 12, Gemini 89, Perplexity 56, Claude 17.
Where do AI assistants get their recommendations for plumbers in San Francisco?
From the sources they search and cite. The most-cited here were consumeraffairs.com (7 answers), trustanalytica.org (5 answers), angi.com (4 answers), along with the businesses’ own websites. A business's own website and listings on those sites are what the assistants read.
Does Leolens rank or endorse these businesses?
No. The table counts how often AI assistants named each business. Leolens did not rate, review or rank them, and no business paid to appear.
How we collected this
In October 2026 we asked ChatGPT (gpt-5.6-terra), Gemini (gemini-3.8-flash), Perplexity (perplexity/sonar) and Claude (claude-sonnet-5) the question Who is the best plumber in San Francisco, CA?
3 times each, through each provider’s API with web search turned on, as a new conversation with no account, history or location. A separate model listed the businesses each answer named; we checked every name against the answer’s own text and merged different spellings of the same business. Sources are the sites the engines linked to.
The apps use your location and history, so what you see there can differ. Nothing on this page is a rating or review by Leolens, and no business paid to appear. For how this market compares with the rest, see the October 2026 study.
Spot an error, or want your business removed from this page? Email hello@tryleolens.com and we’ll correct it.