Does traditional SEO help you rank in ChatGPT?

Yes, but only part of the way. Traditional SEO (search engine optimization, the work of getting your pages crawled, indexed and ranked on Google) makes your firm's site readable to every AI engine, and it is nearly all Google asks for its own AI answers. It does not decide who ChatGPT names. ChatGPT uses its own crawler and picks its own sources, and the published studies show little overlap with Google's first page.

This post sets out what Google, OpenAI, Perplexity and Microsoft each document, what the overlap studies measured, and where they disagree. It is written for a managing partner who wants to know how much of the firm's existing SEO spend already counts.

What does each engine say it needs from your site?

Each company publishes its own rules, and they are not the same rules. The table summarizes what the documentation says. The paragraphs after it give the detail and the links.

Google. Google is the plainest. Its documentation says there are no additional requirements to appear in AI Overviews or AI Mode, and no special optimizations: a page must be indexed and eligible to be shown with a snippet. Its newer guide goes further and says that, from Google Search's perspective, optimizing for generative AI search is still SEO, because those features retrieve pages from the same Search index using the same core ranking systems.

The same guide lists what you can skip for Google: llms.txt files, breaking content into small "chunks," rewriting pages for AI, and adding special structured data. It also names one setting worth knowing about: a site must be included in Search generative AI features in Search Console to be eligible, and a generative AI performance report there shows how your pages appear.

OpenAI. OpenAI documents several crawlers with different jobs, and they are easy to mix up in a robots.txt file. OAI-SearchBot is the search crawler: OpenAI says sites that opt out of it will not be shown in ChatGPT search answers, though they can still appear as navigational links. GPTBot is the training crawler: disallowing it tells OpenAI not to use your content to train its models. ChatGPT-User fetches a page when a user's action calls for it, and OpenAI says it is not used to decide whether content may appear in search.

So a firm can refuse training and still be eligible for answers, by blocking GPTBot and allowing OAI-SearchBot. OpenAI's crawler page says nothing about how ChatGPT ranks the pages it can reach, and it does not say which outside search indexes, if any, supplement its own crawl. Anyone who tells you the exact formula is guessing.

Perplexity. Perplexity's rules follow the same pattern. Its documentation says PerplexityBot surfaces and links websites in Perplexity's results and is not used to crawl content for AI foundation models. It recommends allowing PerplexityBot in robots.txt and permitting its published IP ranges, and it includes firewall instructions, because a web application firewall can block the bot even when robots.txt allows it. A second agent, Perplexity-User, fetches pages at a user's request and generally ignores robots.txt.

Microsoft. Microsoft ties its AI answers to Bing's tools. In February 2026 it added an AI Performance report to Bing Webmaster Tools that shows how often a site is cited across Microsoft Copilot, AI-generated summaries in Bing and select partner integrations. The same post recommends IndexNow, which notifies participating search engines when a page changes, along with clear headings, tables and FAQ sections. If your SEO program has never touched Bing, this is the part of the picture it has not seen.

What do the overlap studies show, and where do they conflict?

They show that a top Google ranking overlaps a great deal with Google's own AI answers and much less with ChatGPT's. They also disagree with each other, so treat every figure as one measurement on one date.

ChatGPT and the other assistants. Ahrefs ran 15,000 long-tail prompts through Google, Bing and four assistants, using data collected in early July 2025. On average, 12% of the links the assistants cited appeared in Google's top 10 for the same prompt. For ChatGPT the figure was 8.0% for in-text citations and 6.1% for reference links, with 8.1% overlap against Bing's top 10. Perplexity was the outlier at 28.6%. About 80% of the cited pages did not rank anywhere in Google for the original prompt.

A conflicting reading. Profound, which sells AI visibility monitoring, published its own analysis in August 2025. It reported that ChatGPT's alignment with Google rose from 12% in April 2025 to 33% in July 2025, while its alignment with Bing fell from 26% to 8%. That July figure for Google is about four times what Ahrefs measured in the same month. Profound's post does not define how it counted a match, and the two studies used different prompts, so the gap may be method as much as substance. Both agree on one thing: most of what ChatGPT cites is not on Google's first page for the question asked.

Google's own AI Overviews. Here overlap is higher, and it has moved. Ahrefs' July 2025 study found about 76% of pages cited in AI Overviews ranked in the top 10 for the same query. Its March 2026 update, covering 863,000 keywords and 4 million AI Overview links, found about 38% in the top 10, 31% in positions 11 to 100 and 31% outside the top 100. Ahrefs attributes most of the change to Google's query fan-out, and it also says it improved how it detects citations between the two studies. So the two numbers are not a clean before and after.

Why the overlap is low is less mysterious than it looks. Google's guide explains that its AI features issue several related searches for one question (query fan-out) and assemble an answer from all of them. An assistant may never search the exact words your prospect typed. A page can be cited for a question it does not rank for, and a page that ranks first can be passed over.

What carries over from SEO?

The foundation does. Three parts of ordinary SEO work help in every engine:

• Technical access. A site that loads quickly, renders without being blocked and has a clean robots.txt is readable by any crawler. Google's guide says existing technical SEO best practices remain worthwhile for its AI features.
• Pages that answer the question. Google's guide puts unique, useful, first-hand content above everything else in it. A practice page that states who you represent, in which matters, where and on what fee basis is easier for any system to quote.
• Google Business Profile. Google says a Business Profile can help a local business appear in AI responses as well as regular results.

If your firm has paid for competent SEO, none of that money was wasted. A firm with a slow, thin or half-indexed site should fix that before buying anything labeled AI.

What does not carry over?

Four things your SEO program measures or assumes do not transfer.

• Your ranking position. The Ahrefs figures above show that ranking in Google's top 10 does not make a page one of ChatGPT's sources.
• Google-only crawler checks. Search Console confirms Googlebot can reach you. It says nothing about OAI-SearchBot or PerplexityBot, and a firewall rule can block those while Google passes.
• Your reports. A rank report cannot show which firms an assistant named. Google and Microsoft each report AI citations for their own products and partners. Nothing in OpenAI's crawler documentation describes an equivalent report for ChatGPT, so someone has to ask the questions and log the answers.
• The sources that vouch for you. Assistants read directories, reviews and press alongside your site. Our post on how law firms get recommended by ChatGPT covers which outside sources matter for a firm and how the advertising rules apply, so it is not repeated here.

Steps you can take today

None of these needs a vendor. An office manager and whoever hosts your site can finish them in an afternoon.

1. Read your robots.txt. Open yoursite.com/robots.txt. Confirm OAI-SearchBot and PerplexityBot are not disallowed, and check that a blanket rule against AI bots has not caught them. Decide separately whether to block GPTBot.
2. Ask your host about the firewall. Send one email: "Does our CDN, security plugin or firewall block OAI-SearchBot or PerplexityBot?" Both companies publish IP ranges your host can allow.
3. Confirm Google can show your pages. In Search Console, check that your practice pages are indexed, that no nosnippet or noindex tag is on them by accident, and that the site is included in Search generative AI features.
4. Verify the site in Bing Webmaster Tools. Submit your sitemap, then open the AI Performance report to see whether Copilot has cited you. Ask your developer whether your platform supports IndexNow.
5. Update your Google Business Profile. Check the firm name, address, hours, categories and attorney list against your website.
6. Put the key facts in text. Practice areas, counties served, bar admissions and fee structure should be written on the page, not locked in an image or a PDF.
7. Run five questions. Ask ChatGPT, Perplexity, Copilot and Google's AI Mode the questions your intake team hears most, with your city. Record the date, the firms named and the sources linked. Repeat monthly.

How to check where you stand

Step seven is the test. If your firm is named for most of your questions, your SEO is carrying over and you may not need anything more than a monthly re-check. If you rank well on Google and are missing from the assistants, the gap is in the list above, and the linked sources in each answer tell you where to look. If you are weighing whether to add this work to an existing retainer, our AEO vs SEO cost comparison shows what overlaps so you do not pay for it twice, and what law firm SEO costs in 2026 covers what the retainer itself should include.

If you would rather have it run for you, our free AI visibility audit puts your practice-area questions to five engines and shows which firms are named and which sources the answers rely on. More on how we work with firms is on the law firms page.

Frequently asked questions