Boston, MA · October 2026
Which plumbers in Boston do AI assistants recommend?
We asked ChatGPT, Gemini, Perplexity and Claude Who is the best plumber in Boston, MA?
3 times each and counted every plumber they named.
Last updated · 12 answers
- 19plumbers named
- 2named by 3 or more engines
- 21/100answer stability
What the answers show
- Ask four AI assistants about plumbers in Boston and you get 19 different names. Only 2 of them 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 21/100), so a single check of your visibility can mislead. Perplexity varied most, at 11/100.
- The most-named plumber was Horvitz Plumbing & Heating, in 6 of 12 answers across 3 of 4 engines.
- expertise.com was the listing site AI assistants cited most often for plumbers in Boston (6 of 12 answers), so a listing there matters.
Plumbers AI assistants named in Boston
| Plumber | ChatGPT | Gemini | Perplexity | Claude | Total |
|---|---|---|---|---|---|
| 1Horvitz Plumbing & Heating | 2/3 | 0/3 | 2/3 | 2/3 | 6/12 |
| 2Vaughan Plumbing & Heating | 0/3 | 1/3 | 1/3 | 2/3 | 4/12 |
| 3Boston Standard Company | 0/3 | 3/3 | 0/3 | 1/3 | 4/12 |
| 4Roto-Rooter Boston | 2/3 | 0/3 | 1/3 | 0/3 | 3/12 |
| 5Winters Home Services | 0/3 | 3/3 | 0/3 | 0/3 | 3/12 |
| 6Boston Budget Plumbing, Heating & Cooling | 1/3 | 0/3 | 1/3 | 0/3 | 2/12 |
| 7Plumbing Solutions | 1/3 | 1/3 | 0/3 | 0/3 | 2/12 |
| 8T-Flow Inc. Plumbing Repair | 0/3 | 1/3 | 0/3 | 1/3 | 2/12 |
| 9Big Blue Plumbing & Heating | 2/3 | 0/3 | 0/3 | 0/3 | 2/12 |
| 10Drain Flow | 0/3 | 0/3 | 0/3 | 2/3 | 2/12 |
Also named: Trust 1 Services Plumbing & Heating (2), Z Plumberz of Greater Boston (2), 128 Plumbing, Heating, Cooling & Electric (1), Boston Best Plumbing (1), Chase Plumbing Co., Inc. (1), Floros Plumbing & Heating (1), Jeff's Drains (1), The Boston Plumber (1), Trethewey Brothers (1).
Sources AI assistants cited
The websites the engines linked to most often in these answers.
- expertise.com6 of 12 answers
- bestprosintown.com a named business’s website4 of 12 answers
- consumeraffairs.com4 of 12 answers
- bestpickreports.com a named business’s website3 of 12 answers
- bestplumbingservicesinboston.com a named business’s website3 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 Boston" gives an assistant more to work with than five stars alone.
Questions
Which plumbers in Boston do AI assistants recommend most often?
In October 2026, Horvitz Plumbing & Heating was named in 6 of 12 answers from ChatGPT, Gemini, Perplexity and Claude, followed by Vaughan Plumbing & Heating (4) and Boston Standard Company (4). The table above has the full count.
What is the best plumber in Boston, according to AI?
The assistants do not settle on one. Asked Who is the best plumber in Boston, MA?
3 times each, they named 19 different plumbers, and 2 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 21 on average: ChatGPT 20, Gemini 35, Perplexity 11, Claude 17.
Where do AI assistants get their recommendations for plumbers in Boston?
From the sources they search and cite. The most-cited here were expertise.com (6 answers), consumeraffairs.com (4 answers), checkbook.org (3 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 Boston, MA?
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.