When a homeowner asks ChatGPT for a plumber in Bergen County, the answer does not come from nowhere. ChatGPT pulls from a specific set of sources to build its recommendations, and most contractors have no idea which sources those are or whether their business appears in any of them.
The short answer: ChatGPT reads review sites, business directories, social platforms, and editorial content to decide which contractors to recommend. Google Business Profile, Yelp, Facebook, Angi, and Thumbtack all feed the pipeline. But the mix is not what most contractors expect, and the sources differ between ChatGPT, Google AI Overviews, Perplexity, and Gemini.
The 10 Sources ChatGPT Reads Most
Peec AI analyzed 30 million cited sources across AI search engines in July 2026 and published the top 10 most-cited domains. The list, in order:
- YouTube
- Wikipedia
- Forbes
- G2
- Yelp
- Medium
- TechRadar
Some of those make sense for contractors. Yelp, Facebook, and YouTube are places where trades businesses already show up through customer reviews, business pages, and project photos. Reddit shows up because homeowners ask for contractor recommendations in local subreddits, and the threads get cited.
Others are less obvious. LinkedIn matters because ChatGPT uses it to verify business entities and professional credentials. Wikipedia shows up for category-level queries ("what is HVAC maintenance") more than for specific contractor recommendations. Forbes and G2 are general business sources that appear when AI engines look for editorial context about service categories.
The key insight from Peec AI's data: the source mix differs by engine. ChatGPT leans on editorial sources like Wikipedia and Forbes. Google AI Overviews and AI Mode pull more from YouTube, Facebook, and Yelp. Perplexity builds answers from a wider net of sources and includes clickable citation links.
For a contractor, that means being on Yelp and Facebook is not optional. Those platforms feed both ChatGPT and Google AI Overviews.
Google Business Profile: The One Directory AI Engines Read First
Google Business Profile is the single most important listing for AI visibility. SOCi's 2026 Local Visibility Index found that ChatGPT's profile accuracy rate for business details sits at 68%, compared to 100% for Gemini. That gap exists because Gemini pulls directly from Google's own data, while ChatGPT cross-references Google data with other sources and introduces inconsistencies.
For contractors, the practical steps are straightforward. Claim the Google Business Profile. Fill out every field: services, service areas, hours, photos, license numbers. Post updates. Respond to reviews. Keep the business name, address, and phone number identical to what appears on the website, on Yelp, and on Facebook.
Scatterbranch Marketing's 2026 research found that businesses with schema markup on their websites receive 3.2 times more AI citations than those without. Adding LocalBusiness schema, or better yet a trade-specific subtype like HVACBusiness or Plumber, gives AI engines structured data they can parse and cite directly.
Yelp and Facebook: The Review Engines
Yelp and Facebook are the two platforms where customer reviews feed AI recommendations most directly. ChatGPT reads Yelp listings for business details, star ratings, and review content. Facebook pages provide business verification and customer posts that AI engines use as social proof.
The Foxxr 2026 Home Service AI Visibility Report studied 50 home service businesses and found something that surprised the researchers. One business with 181 reviews and a 4.8-star rating scored zero on AI visibility. Reviews alone do not guarantee AI recommendations. But missing from Yelp and Facebook almost certainly guarantees invisibility.
The play is simple. Claim the Yelp business page. Claim the Facebook business page. Keep both updated with current services, photos, and contact information. Ask happy customers to leave reviews on both platforms. Respond to reviews, positive and negative. AI engines read review content, not just star counts, to build their assessment of a business.
Angi and Thumbtack: Marketplace Listings Inside ChatGPT
Angi launched a ChatGPT app on March 4, 2026, and Thumbtack announced its integration in October 2025. Both marketplace platforms now appear inside ChatGPT's ecosystem. When a homeowner asks ChatGPT for a contractor, Angi and Thumbtack listings can surface through those integrations.
The catch: Steady Demand's August 2026 grounding drift study found that 60% of Gemini citations point to business websites, not directories or marketplaces. Directories help with discovery, but a contractor's own website with schema markup and answer-shaped content is the stronger long-term play for AI visibility.
Angi and Thumbtack are worth listing on, especially for trades businesses that already use them for lead generation. But they should complement a strong website, not replace one. The marketplace platforms take a cut of each lead and control the customer relationship. A contractor's own website, listed in directories and structured with schema, is the asset that builds durable AI visibility.
Reddit: Where Homeowners Ask for Recommendations
Reddit appears as the most-cited source across all AI search engines in Peec AI's data. That does not mean every contractor needs to start posting on Reddit. It means that homeowners go to local subreddits like r/BergenCounty, r/NYC, and r/HomeImprovement to ask for contractor recommendations, and AI engines cite those threads.
A contractor showing up in a Reddit thread with five upvotes and a homeowner saying "Joe's Plumbing fixed my leak fast" is worth more for AI visibility than a paid directory listing. AI engines read the thread, see the business name mentioned in a positive context, and factor that into recommendations.
The practical version: do not spam Reddit. Do respond to threads where homeowners ask for recommendations in the service area, if the contractor genuinely serves that area. Answer questions. Be helpful. Mention the business name and website naturally. Reddit threads persist and get cited by AI engines for months after they are posted.
The Directory Gap Most Contractors Miss
Most trades businesses have a Google Business Profile and maybe a Yelp page. Fewer maintain Facebook pages, and fewer still think about Reddit, LinkedIn, or schema markup on their own website.
The gap is consistency. SOCi's 2026 data shows that ChatGPT's business profile accuracy is 68%, meaning nearly one in three business listings has wrong or missing information when AI engines pull it. Inconsistent business names, outdated addresses, old phone numbers, and missing service descriptions all reduce AI visibility.
The fix is a directory audit. List every platform where the business appears. Check that the name, address, phone number, services, and hours are identical across all of them. Add the business to any platform where it is missing. Remove duplicate listings. This is not exciting work, but it is the foundation of AI visibility for trades businesses.
The Full Directory Checklist for AI Visibility
For a contractor building AI visibility from scratch, or fixing what exists, here is the order to work through:
Tier 1 (must have):
- Google Business Profile, fully completed with services, service areas, photos, and reviews
- Business website with LocalBusiness or trade-specific schema markup
- Yelp business page, claimed and updated
- Facebook business page, claimed and updated
Tier 2 (high value):
- Angi listing
- Thumbtack listing
- LinkedIn company page
- Reddit presence in local subreddits
Tier 3 (nice to have):
- Bing Places for Business listing
- Apple Maps listing via Apple Business Connect
- Better Business Bureau profile
- Trade association directory listings
Start with Tier 1. Most contractors stop at Google Business Profile and call it done. Adding Yelp, Facebook, and schema markup on the website puts a business ahead of the majority of competitors in the AI visibility pipeline.
Run a Free AI Visibility Audit
FirstCall Visibility offers a free 12-point AI visibility audit that checks which directories list a business, whether the information is consistent across platforms, whether schema markup is present on the website, and how the business appears in ChatGPT, Google AI Overviews, Perplexity, and Gemini for relevant local queries.
Run your free AI visibility audit
Frequently Asked Questions
Does ChatGPT use Yelp to recommend contractors?
Yes. Yelp is one of the top 10 most-cited domains across AI search engines according to Peec AI's July 2026 analysis of 30 million cited sources. ChatGPT pulls review data and business listings from Yelp when generating local contractor recommendations.
What directories does ChatGPT read for local business recommendations?
ChatGPT draws from Reddit, YouTube, LinkedIn, Wikipedia, Forbes, G2, Yelp, Facebook, Medium, and TechRadar according to Peec AI's analysis of 30 million cited sources. Google AI Overviews pull more from YouTube, Facebook, and Yelp, while ChatGPT leans on editorial sources like Wikipedia and Forbes.
How does a trades business get listed in directories that ChatGPT reads?
Claim and complete profiles on Google Business Profile, Yelp, Facebook, Angi, and Thumbtack. Keep business name, address, and phone number identical across all of them. Add trade-specific schema markup to the business website. Encourage customer reviews on platforms AI engines cite. Publish answer-shaped content that AI can parse and quote.
Does ChatGPT recommend Angi or Thumbtack listings for contractors?
ChatGPT can surface Angi and Thumbtack listings through marketplace integrations. But Steady Demand's August 2026 study found that 60% of Gemini citations point to business websites, not directories. Directories help with discovery, but a contractor's own website with schema markup is the stronger play for durable AI visibility.
Can a contractor pay to appear in ChatGPT recommendations?
No. ChatGPT does not accept paid placement in its recommendations. Visibility comes from being cited in the sources it reads: review sites, directories, editorial content, and the business's own website with structured data. FirstCall Visibility offers a free 12-point AI visibility audit to identify gaps.