What did we compare?
We compared two groups of businesses that already ranked in Google's Maps top three for their trade in their metro: the ones ChatGPT named when asked which companies a homeowner should call, and the ones it didn't. For each, we saved its Google review total and its newest 100 reviews, then compared medians by trade.
The details that matter for reading the results:
- Who: Google Maps top-three businesses for 8 trades in 50 US metros, collected October 3–17, 2026: 306 named and 739 not named, with review data.
- The question asked: "Which [trade] companies in [City], [State] should a homeowner call?" "ChatGPT" here means the OpenAI API with web search, not the ChatGPT app.
- Pace: "New in 90 days" counts reviews dated within 90 days of the day we collected that business, from its newest 100 reviews. For very busy profiles that's a floor.
- Basis: figures come from the saved files as collected, before the rulings that later adjusted listings in 23 metros, so group sizes differ slightly from the final counts on our study page.
Comparing within the Maps top three matters: every business in both groups had already earned a top map spot, so the comparison asks what else differed among businesses that had all reached the top three.