Checked October 15, 2026 · 60 answers · 5 cities
loc.aiThe local AI index

Edition 01 · Plumbers · 5 US cities

We asked 4 AIs who to hire. Here's who they picked.

60 answers from ChatGPT, Gemini, Claude and Perplexity. 226 plumbers named. Every one checked against Google Maps on October 15, 2026.

Browse the cities ↓Model leaderboard
plumbers named by all 4 engines, across 5 cities
13plumbers named by all 4 engines, across 5 cities
plumbers named by only one engine. The AIs mostly disagree.
151 of 226plumbers named by only one engine. The AIs mostly disagree.
Google Maps top-10 plumbers named by any AI at all
16 of 50Google Maps top-10 plumbers named by any AI at all

The cities

Three prompts per city, four engines each. Ranked by how many engines named a business, then how often.

  1. 0154 named · 30% overlap

    Austin, TX

    1. Abacus Plumbing, Air Conditioning & Electrical4 of 4 engines · 9 of 12 answers
    2. Radiant Plumbing, Air Conditioning, & Electrical4 of 4 engines · 5 of 12 answers
    3. Proven Plumbing & Air4 of 4 engines · 4 of 12 answers
    7 not found on Maps
  2. 0251 named · 26% overlap

    Denver, CO

    1. Roto-Rooter Plumbing & Water Cleanup4 of 4 engines · 8 of 12 answers
    2. Applewood Plumbing Heating & Electric4 of 4 engines · 7 of 12 answers
    3. Prime Plumbing & Heating3 of 4 engines · 6 of 12 answers
    5 not found on Maps
  3. 0357 named · 28% overlap

    Phoenix, AZ

    1. Robins Plumbing, Inc4 of 4 engines · 6 of 12 answers
    2. Roto-Rooter Plumbing & Water Cleanup4 of 4 engines · 5 of 12 answers
    3. The Aussie Plumber3 of 4 engines · 6 of 12 answers
    1 not found on Maps
  4. 0434 named · 38% overlap

    Nashville, TN

    1. 100 Percent Plumbing4 of 4 engines · 7 of 12 answers
    2. Benjamin Franklin Plumbing of Nashville4 of 4 engines · 4 of 12 answers
    3. Parthenon Plumbing, Heating, & AC Repair3 of 4 engines · 6 of 12 answers
    6 not found on Maps
  5. 0530 named · 57% overlap

    Columbus, OH

    1. The Waterworks Plumbing, Drain, Heating & Cooling4 of 4 engines · 7 of 12 answers
    2. Eco Plumbers, Electricians, and HVAC Technicians4 of 4 engines · 7 of 12 answers
    3. Roto-Rooter Plumbing & Water Cleanup4 of 4 engines · 5 of 12 answers
    2 not found on Maps

  6. Next editions

    This edition covers plumbers in five cities. More trades and cities to come.

    How we check every name →

For business owners

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