Agent readiness vs SEO vs AEO
SEO gets a page ranked by search engines. AEO (answer engine optimization, also called GEO) gets it quoted when someone asks ChatGPT, Claude or Perplexity. Agent readiness makes sure an AI agent acting for a person can reach the site, read it and finish the task it came for: answer a question, buy something, sign someone up or get an API key. All three need crawlable, server-rendered pages with structured data. Agent readiness adds things search never checked: AI user-agents getting past your bot rules, controls an agent can operate, and an action path that works without a human.
From our data: In our 1,846-company benchmark (11 Oct 2026), 11% of sites served AI agents a bot wall, so a page can rank in Google and still be unreadable to ChatGPT-User. As of 3 Nov 2026, 198 of the 214 software vendors in our rankings had their homepage copy in the raw HTML and 174 published llms.txt.
Side by side
SEO: be found
Who it's for: search crawlers such as Googlebot and Bingbot. Success means rankings and clicks. The work: crawlable, indexable pages, internal links, sitemaps and content worth ranking.
AEO / GEO: be quoted
Who it's for: answer-engine crawlers (OAI-SearchBot, Claude-SearchBot, PerplexityBot) and the user agents that fetch a page mid-chat (ChatGPT-User, Claude-User, Perplexity-User). Success means being named and cited. The work: let those bots in, open key pages with a one-sentence definition, publish dated facts, and add Organization and FAQ markup.
Agent readiness: get the job done
Who it's for: agents acting for a person, from ChatGPT agent in a cloud browser to a coding agent reading your docs. Success means the task is finished. The work: no bot wall, buttons and form fields an agent can identify, and an action path (cart, sign-up, API key or MCP server) with no step only a human can do.
What Google says
Google's AI optimization guide says appearing in AI Overviews and AI Mode is still SEO: the same ranking systems apply, and Google Search doesn't use llms.txt, markdown copies or special AI markup. The same guide also says browser agents that book and compare things for people read screenshots, the DOM and the accessibility tree, and points site owners to web.dev's guide to agent-friendly sites. So: do SEO for Google, and do agent readiness for the agents, including Google's own.
Where they pull in different directions
Bot rules
SEO teams allow Googlebot and often challenge everything else. That catches ChatGPT-User and Claude-User, which fetch a page because a person asked about you.
JavaScript
Google renders JavaScript. Most AI fetchers don't, so copy that only appears after scripts run is invisible to them.
Gated facts
"Contact us for pricing" can still rank. An agent asked "how much is it?" gets nothing to quote and no way to sign up.
Files Google ignores
llms.txt and markdown copies do nothing for Google Search, but coding agents and docs tools do read them. They're cheap; add them for agents, not for rankings.
What to fix first
Start with the checks worth the most points in our score. They help all three.
Agents get the real page, not a bot wall
Serve AI user-agents (Claude-User, ChatGPT-User) the same HTML as browsers: no challenge, no 403. Check your WAF and bot rules.
robots.txt lets user-triggered agents in
Don't Disallow ChatGPT-User, Claude-User or Perplexity-User. They fetch pages because a person asked.
Content is in the raw HTML
Server-render the page. If the copy isn't in the response to a plain request, most AI crawlers can't see it.
Structured data (JSON-LD)
Add JSON-LD: Organization (or Person on a personal site), plus Product, SoftwareApplication, LocalBusiness or Article depending on the page.
Answer-engine crawlers are allowed
Allow OAI-SearchBot, Claude-SearchBot, PerplexityBot and meta-webindexer in robots.txt so you can be cited.
Check it yourself
The first two commands fetch your homepage as Claude and ChatGPT: you want 200. The third prints the visible text an AI fetcher gets without running JavaScript. If your product name and what you do aren't in it, agents can't see them either.
curl -s -o /dev/null -w "%{http_code}\n" \
-A "Mozilla/5.0 (compatible; Claude-User/1.0)" https://example.com/
curl -s -o /dev/null -w "%{http_code}\n" \
-A "Mozilla/5.0 (compatible; ChatGPT-User/1.0; +https://openai.com/bot)" https://example.com/
curl -s -A "Mozilla/5.0 (compatible; Claude-User/1.0)" https://example.com/ \
| sed -e 's/<script[^>]*>.*<\/script>//g' -e 's/<[^>]*>//g' | tr -s ' \n' | head -c 1500Questions
Is AEO the same as GEO?
Yes, in practice. Answer engine optimization and generative engine optimization both mean making your site easy for AI assistants to find, read and cite. Agent readiness is the next step: whether an agent can act on the site, not just quote it.
Does agent readiness replace SEO?
No. Assistants still find most pages through search indexes, and Google says its AI features run on the same systems as Search. Agent readiness sits on top of good SEO.
Do I need llms.txt for Google?
No. Google's AI optimization guide says Search doesn't use llms.txt. Coding agents and docs tools do read it, so it's still worth a few minutes.
Can a site rank well and still fail agent readiness?
Yes, and it's common. A bot wall that lets Googlebot through but challenges AI user-agents, a JavaScript-only pricing table, or a sign-up behind a CAPTCHA all leave rankings intact and stop agents cold.