Which plumbing companies does AI recommend in Denver?
We asked ChatGPT, Google Gemini, and Perplexity to recommend plumbing companies in Denver, CO — 6 hiring questions, 18 recorded answers, every one saved. They named 42 different businesses. These are the 17 that came up more than once.
Recommendations were more concentrated. Blue Sky Plumbing, Heating, Cooling & Electric appeared in 11 of 18 answers.
Definition: openness measures how spread out the business names were in these 18 answers. Higher means more dispersed; lower means more concentrated. It is not market saturation, demand, or a quality score.
The 17 plumbing companies that came up more than once.
Ordered by how many of the 18 answers named them. This is not a ranking of quality and none of these are our clients — it is a record of who three assistants named for Denver, CO on July 26, 2026. If you are one of the plumbing companies in this market and you are not on this list, the scan did not observe your business among the repeat names.
- Blue Sky Plumbing, Heating, Cooling & Electric
- Roto-Rooter (Denver)
- Brothers Plumbing, Heating & Electric
- Time Plumbing, Heating & Electric
- Leak Fix CO
- Plumb Pros Inc.
- Benjamin Franklin Plumbing of Denver
- Mr. Rooter Plumbing of Denver
- High 5 Plumbing
- Bell Plumbing, Heating, Cooling & Electrical
- A Perfect Plumber
- Mile High Drain
- Colorado Water Works
- King Rooter & Plumbing
- High 5 Plumbing (High 5 Plumbing, Heating, Cooling & Electric)
- Denver Plumbing & Drain Pro
- Plumbline Services
Even Blue Sky Plumbing, Heating, Cooling & Electric does not win everything here. It was never named when we asked about best plumber. Those question types returned different names in our sample.
All three assistants agreed on 4 of them
Blue Sky Plumbing, Heating, Cooling & Electric, Roto-Rooter (Denver), Brothers Plumbing, Heating & Electric, Bell Plumbing, Heating, Cooling & Electrical were named by ChatGPT, Gemini, and Perplexity alike. Agreement across three systems that read different sources is a stronger observed pattern than appearing in only one system. In Denver, that happened for 4 businesses.
Denver has more aging pipe than plumbers to work it.
The supply side here is comparatively thin: 159 employer plumbing, heating, and air-conditioning contractors in Denver County — one per 2,218 county housing units, under the code Census shares between the two trades. Set that against a median build year of 1974 — supply lines, stacks, and water heaters age with the house — and capacity, not demand, is the constraint. The assistants named 42 plumbing businesses for Denver, only 17 of them repeatedly.
City figures: American Community Survey 2019-2023 5-year estimates, Denver city, Colorado. County figures: County Business Patterns 2023, Denver County; establishment counts include only businesses with paid employees. The two boundaries are different sizes and are never divided into each other.
In Denver, the evidence sits on brothersplumbing.com.
This is a record of observed answers, not a paid ranking. In Denver they read brothersplumbing.com and rotorooter.com when forming their answers. The industry page explains how we address website and third-party evidence: what we build for plumbing companies.
For a plumbing companies business in Denver competing with evidence from brothersplumbing.com, Routeless can build the website and connected systems. Inspect the production work.
For Denver, the source cited most was brothersplumbing.com.
All three assistants searched the web before answering and cited what they read. Across the Denver, CO answers they cited 171 sources. These were the most frequently cited sources behind the plumbing companies named here:
- brothersplumbing.com10
- rotorooter.com8
- blueskyplumbing.com7
- reddit.com6
- expertise.com5
- teamdavelogan.com5
- serviceagent.ai5
- timeplumbing.rankloft.com4
- aperfectplumber.com4
- facebook.com4
- leakfixco.com4
- benjaminfranklinplumbing.com4
- plumblineservices.com4
- firstindenver.com3
- todayshomeowner.com3
- consumeraffairs.com3
- plumbprosinc.com3
- coloradowaterworks.com3
- yelp.com3
- bellplumbing.com3
Directories accounted for only 19.3% of the Denver citations; the rest came from businesses' own sites and local coverage. Much of that evidence can be updated directly on the business website.
Additional results from the Denver scan.
25 more were named exactly once
These came up in a single answer, from a single assistant, and never again across the other 17. The sample contains a small group named repeatedly and a longer list named once. A single mention may not repeat in the next run.
- Water Heater Experts Plumbing
- Rooter Guy
- Tipping Hat
- No Limits Plumbing & Drains
- Hyper Flow Service Company
- Applewood
- Applewood Plumbing Heating & Electric
- Prime Plumbing Heating Inc.
- Vectra Mechanical
- Flow-Rite Plumbing
- Imperial Plumbing LLC
- Repipe Specialists
- Knight Plumbing LLC
- Rooter 66 Plumbing
- Deft Plumbing
- Done! (ItsDone / Done Plumbing & HVAC)
- Bill Smith Plumbing & Heating
- Doctor Fix-It Plumbing, Heating and Electric
- Bluefrog Plumbing + Drain
- Done!
- Afford-A-Rooter
- Superior Denver Plumber
- Apex Fix Solutions
- Roto-Rooter Plumbing & Water Cleanup
- Apple Plumbing Repair
How many each assistant would name
- ChatGPT 24 plumbing companies named in Denver
- Google Gemini 18 plumbing companies named in Denver
- Perplexity 16 plumbing companies named in Denver
The assistants disagreed on 3 of 6 questions
Asked the identical question about Denver, 3 of 6 comparisons produced no shared business at all — three assistants, three separate shortlists. There is no single "AI answer" for this market to optimize against, which is why being named by one assistant tells a Denver owner very little about the other two.
Same questions, other markets.
The plumbing companies study puts all five cities side by side — which brands cross city lines, and which sources decide the answer trade-wide.
Plumbing companies in the other cities we measured
- Las Vegas, NV 42 named · most cited: Pure Plumbing & Air
- Tampa, FL 48 named · most cited: EVERYDAYPLUMBER.com
- Phoenix, AZ 37 named · most cited: Parker & Sons
- Austin, TX 52 named · most cited: Reliant Plumbing
Other trades in Denver
- Law firms 43 named · 40.1% from directories
- Roofing companies 56 named · 9.6% from directories
- HVAC companies 49 named · 23.4% from directories
- Dental practices 43 named · 15.4% from directories
- Med spas 41 named · 8.7% from directories
Exactly what we asked in Denver.
- Who is the best plumber in Denver, CO? commercial
- A pipe burst under my sink in Denver, CO and water is going everywhere. Which local plumber should I call right now? situational
- Who is the best company for whole-house repiping in Denver, CO? commercial
- My water heater failed in Denver, CO and I need it replaced this week. Which local plumbing company should I hire? situational
- Which plumbing company in Denver, CO has the best customer reviews? commercial
- Which plumber in Denver, CO offers 24-hour emergency service? commercial
Method. 6 questions × 3 assistants = 18 answers for Denver, CO alone, collected July 26, 2026 from ChatGPT (gpt-5-mini), Google Gemini (gemini-flash-latest), Perplexity (sonar), with web search enabled because that is what a buyer's app does. Names were resolved across spelling variants first, so one company spelled three ways counts once. Assistants are non-deterministic; this is one dated run, not a standing ranking. The full methodology gives the prompts, the scoring formula, and what these numbers cannot support. Want it for your own business? The free AI visibility report runs it against your market.
Want to know what this means for your business?
Run the same measured scan against your business, or send us the website and problem if you want help building the response.
The scan is free. Project scopes and prices are always put in writing before work begins.