Copp OakThe short version
- Most-named: Atlanta Plumbing & Drain, in 7 of 16 answers. All 7 were ChatGPT’s. Gemini never named it.Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
- Booking: ChatGPT offered to help book in 3 of its 8 answers. Gemini: 0 of 8. In 13 of the 16 answers, there was nothing beyond a phone number or a website.Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
- Where it breaks: The two assistants barely overlap. Asked the same question, they named at least one plumber in common in just 2 of the 8 pairs.Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
Who ChatGPT names most (8 answers)
| Business | Answers naming it (of 8) |
|---|---|
| Atlanta Plumbing & Drain | 7 |
| Fix & Flow Plumbing Co. | 5 |
| Emergency Plumbers LLC | 2 |
| Plumbing Express | 2 |
Who Gemini names most (8 answers)
| Business | Answers naming it (of 8) |
|---|---|
| Plumbing Express | 3 |
| Roto-Rooter | 3 |
| Superior Plumbing | 3 |
| Atlantis Plumbing | 2 |
| Delta Plumbing | 2 |
| Head's Plumbing Sales & Service | 2 |
| Morningside Plumbing | 2 |
| Mr. Plumber (Coolray) | 2 |
| Plumb Works Inc | 2 |
| Reliable Heating & Air (plumbing division) | 2 |
| TE Certified (plumbing division) | 2 |
| Zippy Plumbing | 2 |
Ties are listed alphabetically. Across both assistants, 24 different companies were named, and 7 of them appeared on both. Fix & Flow Plumbing Co. leans the same way as Atlanta Plumbing & Drain: 5 of 8 on ChatGPT, 1 of 8 on Gemini. Superior Plumbing runs the other way, with 3 of 8 on Gemini and none on ChatGPT.Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
Can you book them?
Three of the eight questions asked the assistant to book outright: the kitchen-drain “soonest slot” request, “Can you book a plumber…this week?”, and “Find me a plumber…and book the appointment for me.”Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
- Gemini said it could not complete the booking itself in all 3 of those answers. It gave contact details instead.Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
- ChatGPT opened an in-chat booking form in 2 of the 3, asking for a ZIP code or street address. In the third, it listed two companies and asked follow-up questions about the job, ZIP code and timing.Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
None of the 16 answers ended in a booked appointment, and our tester stopped at every form without entering anything. Across all eight questions, ChatGPT offered to help book in 3 of 8 answers and Gemini in 0 of 8. In 13 of the 16 answers (ChatGPT 6 of 8, Gemini 7 of 8), there was nothing beyond a phone number or a website. The homeowner gets a list and has to call, click or keep searching.Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
Named isn’t booked.
The takeaway for an Atlanta plumber
Which plumber gets named depends on which assistant the homeowner opens. ChatGPT has a clear favorite in Atlanta Plumbing & Drain. Gemini spreads its answers across a dozen names at 2 or 3 mentions each. Getting named is only half of it. Asked to book, Gemini declined all 3 times and handed back contact details. Being bookable the moment you’re named is the part a shop can control.Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
Method & data
8 customer questions × ChatGPT and Gemini, one paired run per question, captured November 4, 2026 (UTC) in our v2.1 re-run of the sweep. These answers are not part of the 5,788-answer study (collected October 5–28, 2026, across 20 Southeast U.S. metros), and we don’t compare or trend them against it. In that study, 79.1% of sampled ChatGPT/Gemini answers offered neither a booking path nor a connector (4,578 answers); on Gemini the rate was 92.2%. Neither the study nor this re-run measured completed appointments, and neither tested Google Search’s AI Mode. ChatGPT ran on its “Instant” setting and Gemini on “Flash”. When an assistant asked for a ZIP code or address, none was given and no form was submitted. A company counts once per answer, so when one ChatGPT answer listed two Atlanta Plumbing & Drain locations, that counted once. Obvious spellings of the same business were merged (for example “Fix & Flow Plumbing Company” and “Fix & Flow Plumbing Co.”, or three Roto-Rooter listings). Names we couldn’t confidently match were kept separate, such as “Peach Plumbing & Drain” and “Peach Plumbing Atlanta”. This is a count of mentions, not a review or a quality rating, and AI answers vary from run to run.Sources: https://coppoak.com/journal/top-plumbing-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04); https://doi.org/10.5281/zenodo.23745742 (retrieved 2026-11-05); https://coppoak.com/canopy/research/ai-assistant-booking (retrieved 2026-11-05)