LLM SEO: How to Optimize for AI Search Across ChatGPT, Claude, Perplexity, and Google AI Overviews

How Customers Are Finding Service Businesses in 2026

If you own a service business in 2026, your customers’ search habits have already shifted. They open Google for some things, but more and more often they ask an AI tool first.

I tested this directly. In our 10-city AEO study, we asked ChatGPT for the best HVAC and roofing companies in 10 markets and compared the results to what Google was showing for the same query. Across 50 top-ranked Google businesses, only 24 appeared in ChatGPT’s recommendations. Less than half. In Dallas, the overlap was zero — not one of Google’s top HVAC results made it onto ChatGPT’s list.

That gap matters because consumer behavior keeps moving in this direction. Pew Research has documented steady growth in everyday AI use across U.S. adults, and homeowners are using these tools to make real decisions — including who to hire for a leaky water heater or a busted AC. If your business doesn’t show up when an AI is the one answering, you’re invisible to a growing share of buyers.

Some SEO folks are starting to call this LLM SEO — getting your business in front of customers who use AI tools to make decisions. It’s a clunky term and it doesn’t mean much to most contractors. The plain-English version is simpler: AI tools have become a kind of search engine of their own, and the rules for showing up on them are different from the rules for showing up on Google. This guide walks through what those rules actually are, in language you can use, and ends with a 60-day plan you can run yourself.

The Four AI Tools Your Customers Are Asking

There are four AI tools worth thinking about for a local service business. Each works a little differently, and each has a slightly different audience.

ChatGPT. The biggest one. The one most homeowners have heard of. They ask things like “best HVAC company in Phoenix” or “who should I call for a roof leak in Dallas” and ChatGPT gives them a short list of three to five businesses. ChatGPT pulls heavily from comparison articles, Reddit threads, and “best of” listicles when it builds those answers.

Claude. Made by a different company (Anthropic). Used more by professionals and people who want longer, more thoughtful answers. Claude tends to be more cautious about naming specific businesses unless it has strong sources to cite. If your name appears in well-written articles and detailed reviews, Claude is more likely to surface you than if you’re only mentioned in casual forum posts.

Perplexity. A newer search-style AI tool. It looks like a search engine but answers in full sentences with sources cited inline at the end of each paragraph. Perplexity tends to lean on news articles, Reddit, and the public web in roughly equal measure. It’s growing fast in the homeowner-research segment.

Google AI Overviews

This is Google’s own AI answer that appears at the top of regular search results for many queries. If you’ve searched anything on Google in the last year and seen a paragraph-style answer with citations before the blue links start, that’s an AI Overview. The big question for service businesses is how to rank in AI Overviews — and the answer turns out to be very similar to the rules for ChatGPT, Claude, and Perplexity. Google’s AI is reading the same web everyone else’s AI is reading.

The four tools serve different audiences but they all read text the same way. They look for sentences that name your business, what you do, where you do it, and what other businesses you compete against. The more often that pattern appears about you across the open web, the more likely you are to be the recommendation.

Where the AI Tools Agree and Where They Don’t

Here’s a quick comparison of how the four AI tools weigh different things when they pick businesses to recommend. The cell language is rough — none of these companies publish exact ranking formulas — but the patterns are consistent across our testing and across what Search Engine Journal and other industry researchers have observed.

What AI Looks At	ChatGPT	Claude	Perplexity	Google AI Overviews
Comparison articles (“best of [city]“)	Loves them	Loves them	Loves them	Loves them
Reddit threads	Heavy use	Light use	Heavy use	Medium use
Local news features	Medium use	Heavy use	Heavy use	Heavy use
Yelp/Houzz reviews with detailed text	Medium use	Heavy use	Medium use	Heavy use
Backlinks to your site (Google-style SEO)	Low weight	Low weight	Low weight	Medium weight
Your own website’s wording	High weight	High weight	High weight	High weight
Google Ads spend	No weight	No weight	No weight	No weight
Number of Google reviews (no text)	Low weight	Low weight	Low weight	Medium weight

Two patterns stand out in this table.

First, comparison articles win everywhere. Every single one of the four AI tools leans heavily on “best of [your city]” listicles and roundups. If you’re going to do exactly one thing for AI search, it’s getting your business named in three or four good comparison articles in your market.

Second, Google Ads spend buys nothing on AI search. None of the four AI tools see paid placement at all. Whitespark’s Local Search Ranking Factors has documented for years that paid placement on Google doesn’t help organic Google rankings either, but most contractors still assume their ad spend is buying them search visibility somewhere. On AI tools, it’s buying them nothing. The only signal AI tools see is what’s written about your business across the open web — which, if you’re spending all your marketing money on paid acquisition, is probably very little.

The third quieter pattern: contextual reviews matter more than star counts. According to BrightLocal’s Local Consumer Review Survey, 87% of consumers read online reviews before hiring local businesses. AI tools read those reviews too — but they read the words, not the stars. A Yelp review that says “Desert Air came out at 11pm in July, fixed our AC in two hours, charged a fair price” is worth more on AI search than fifty five-star Google reviews with no text.

What to Do on Your Website

Here’s the section on how to optimize for AI search — the practical, on-your-website moves that work across all four AI tools at once. Five changes, all of them straightforward, none of them requiring a developer.

Use your customer’s exact wording in your H1

Your H1 should literally contain the question a customer would ask AI. “The Best HVAC Company in Phoenix for Same-Day Repairs” is better than “Phoenix’s Trusted Heating Partner.” This feels wrong if you’ve been told for ten years not to repeat keywords. AI tools reward you for it. Our ChatGPT SEO playbook goes deeper on why exact-match wording works on AI when it failed on old Google.

Add an FAQ section that mirrors real customer questions

Don’t write the questions you wish customers asked. Write the questions they actually type into ChatGPT. “How much does HVAC repair cost in Phoenix?” “Who’s the best HVAC company in Phoenix for same-day service?” “What should I do if my AC stops working at night?” Pair each with a 60-100 word answer that names your business, your service area, and what makes you different.

Open your homepage with a sentence that names what you are

Something like: “Desert Air Mechanical is the best HVAC company in Phoenix for same-day AC repairs and emergency service.” It sounds like marketing copy. It’s actually how AI tools learn what category your business belongs in. They read that sentence and learn that you compete in the “best HVAC company in Phoenix” category.

Publish at least one comparison page on your own site

Write a piece called “The 5 Best HVAC Companies in Phoenix” and include yourself, plus three or four real competitors. Be honest. Cover pricing ranges, response times, service areas, and specialty work. AI tools cite this kind of content more than any other format. It feels weird to publicly compare yourself to competitors. It works.

Add structured data to your website

This is the technical bit. Ask your developer to add LocalBusiness, Service, and FAQPage schema markup. The Google Search Central documentation covers it. It’s a one-time job, takes maybe two hours, and it tells AI tools exactly what your business does and where it operates.

These five changes together typically take a half-day of work. They don’t break anything else — they don’t hurt your Google ranking, your ad performance, or your conversion rate. They’re pure upside for AI search visibility.

Where to Get Your Business Mentioned

The bigger lift is off your own website. AI tools pull most of what they say from sources you don’t control directly. The good news is you can earn placement on those sources with consistent effort.

The five highest-value places to get mentioned, in rough order of impact:

Reddit threads

Subreddits like r/[your city], r/HVAC, r/Plumbing, and r/HomeImprovement carry serious weight, especially for ChatGPT and Perplexity. The pattern that works: spend 20 minutes a day reading threads. Answer five questions where people ask for recommendations or troubleshooting help. Be genuinely useful. Mention your own business only when it’s the right answer, and only after you’ve earned credibility through unrelated helpful answers. A roofer in Charlotte who answers a dozen real questions about wind damage repair across r/Charlotte and r/HomeImprovement over three months will end up cited in AI responses when someone asks about Charlotte roofers.

”Best of [your city]” listicles

Type “best HVAC company [your city]” into Google. The articles that show up in the top 10 are the same articles AI tools are reading. Email each author. Tell them you’d like to be considered for the next update. Provide your credentials, your reviews, and three examples of work you’re proud of. Most local writers are happy to add real, qualified businesses — they want their lists to be useful too. This is the single highest-leverage move available to most service businesses, and almost no one does it.

Local news and community blogs

Your local newspaper, neighborhood blog, and city-focused magazine all cite local businesses heavily. Pitch a news angle — community involvement, an unusual project, a customer story. Offer yourself as a local expert source for any home services article. One feature article in your city’s paper is worth roughly five backlinks for AI search visibility.

Yelp, Houzz, and BBB write-ups with real text

It’s not the star rating that matters here — it’s whether your reviewers write actual paragraphs. Reach out to your best 20 customers and ask them to leave detailed reviews on Yelp or Houzz. Detailed means: which service they used, what neighborhood they live in, how the job went, what made it different. The more specific the review, the more useful it is to AI tools.

Industry directories with editorial content

ServiceTitan partner pages, Houzz Pro features, awards lists from publications like ACHR News (HVAC) or Roofing Contractor (roofing). These have small audiences but high citation weight because AI tools treat industry-specific publications as authoritative.

The pattern across all five surfaces is the same: AI tools want to see your business named in context, alongside competitors, with reasons given for why you’re a good choice. Anywhere that pattern shows up is a citation. The more places it shows up, the more often you get recommended.

How to Tell If It’s Working

You can’t optimize what you don’t measure. The good news is measuring AI search visibility is easier than measuring Google rankings, because the test is simple: ask the AI directly.

Once a quarter, run this test:

1. Open ChatGPT, Claude, Perplexity, and Google search.
2. Ask each one the question your customers would ask. “Best HVAC company in Phoenix.” “Roofer in Charlotte for storm damage.” Whatever fits your business.
3. Write down the businesses each AI recommends.
4. Note where you appear, where you don’t, and which competitors are showing up that weren’t there last quarter.

This 15-minute exercise tells you more about your AI search visibility than any tracking software can right now. Some SEO folks call this LLM optimization tracking — same thing as what we’re doing here.

When you start the work, you typically won’t be on any of the four lists. By month 3 of consistent effort, you’ll usually appear on one. By month 6, on two or three. By month 12, you should be appearing on most of them in your market.

Track three numbers across each quarter:

• Number of AI tools that recommend you for your top query. Goal: 4 of 4 within 12 months.
• Number of citation surfaces where your business is named. Reddit threads, listicles, news features, detailed Yelp reviews. Goal: at least 8-10 by month 6.
• Phone call volume change. This is the bottom-line measurement. If your AI visibility is growing, your call volume from “found you online” sources should grow too.

Don’t trust black-box tracking tools that claim to measure AI search visibility. The technology is too new and the methodologies aren’t mature. The manual quarterly check is more reliable for now.

Your 60-Day Plan

Here’s the eight-week version of what to do, week by week. It assumes you can put in 30-60 minutes a day on this work. Most contractors do it before the first call of the morning or at the end of the day.

Weeks 1-2 — Website work

Update your H1, add the FAQ section, write the homepage opener sentence, draft a comparison page. Have your developer add the structured data. Most of this is content writing — the technical lift is a couple hours.

Weeks 3-4 — Comparison content and Reddit

Publish your comparison page. Start spending 20 minutes a day on Reddit, in the subreddits where your customers hang out. Answer real questions. Don’t pitch. Just be helpful.

Weeks 5-6 — Listicle outreach and reviews

Email 5-10 authors of “best of [your city]” articles asking to be added. Reach out to your best 20 customers and ask them for detailed Yelp/Houzz reviews. Pitch one local news angle to your city paper.

Weeks 7-8 — Measurement and iteration

Run the four-AI test. Compare results to where you were on day 1. Identify which surfaces you’re showing up on and which you’re not. Double down on what’s working.

The first measurable visibility improvements typically show up between weeks 8 and 14. Don’t expect day-30 wins. The system starts working in month 2 and compounds from there.

When AI Sends You Calls, Your Phone Has to Pick Them Up

There’s one half of this you can do everything right on, and still lose money: when AI starts recommending you, the customer picks up the phone. If they get voicemail, the entire visibility work was wasted on that lead.

Home services businesses miss an average of 27% of inbound calls, and after-hours and weekend calls — exactly when emergency AC failures and water leaks happen — get missed at much higher rates. The contractors winning right now are working both halves at once: they’re getting visible on AI search, and they’re making sure every call gets answered.

This is the gap Ignitvio was built to close. It’s an AI receptionist designed for HVAC, plumbing, roofing, and other service businesses. It picks up every call 24/7, sounds like a real person, qualifies the lead, books the appointment directly into your dispatch software, and texts you a summary the moment the call ends. The customer gets a real conversation. You get a booked job. No call ever goes to voicemail again.

Layered with the AI search work in this guide, the math compounds. Every percentage point of AI visibility you gain is direct top-of-funnel growth. Every missed call you stop missing is direct close-rate growth. Together, they make the difference between a contractor whose phone rings 30 times a week and books 12 jobs, and a contractor whose phone rings 50 times a week and books 35.

The Money Math

Run the numbers for an HVAC business with average tickets of $400 for service calls and $7,500 for system replacements:

• 2-3 missed calls per day after-hours, recovered. $15,000-$30,000 a month in revenue previously lost to voicemail.
• 20-30% of calls coming from AI search instead of Google. If your current monthly call volume is 200, that’s 40-60 calls a month coming through a channel where you weren’t visible at all six months ago.
• Compound growth over 12 months. A contractor who runs the 60-day AI search plan, then keeps iterating, plus stacks 24/7 call capture on top, typically sees 30-40% top-line growth within a year — without increasing ad spend.

The contractors who build both halves now will be the names that own their markets in 2027 and 2028. The ones who stay on the Google-only playbook will spend the next two years watching their organic visibility decay while their competitors capture the calls.

The window is open right now because most service businesses haven’t started yet. Our 10-city study found that less than half of Google’s top-ranked HVAC and roofing companies appear in ChatGPT’s recommendations. That gap is your opportunity. Close it before your competitors do.