AEO vs SEO: what’s the difference?
SEO gets you ranked in a list of links. AEO gets you named inside the answer an AI engine generates. They share roots, but they optimize for two different moments — and modern B2B SaaS needs both.
Updated June 2026
The one-line difference
SEO (Search Engine Optimization) optimizes for ranking — appearing high in a list of links on Google or Bing. AEO (Answer Engine Optimization) optimizes for being named inside the single synthesized answer an AI engine gives. One wins a click from a list; the other wins the recommendation itself.
Side by side
| SEO | AEO | |
|---|---|---|
| Goal | Rank in the list of results | Be named in the generated answer |
| Surface | Google, Bing search pages | ChatGPT, Claude, Perplexity, Gemini |
| Output | Ten blue links | One synthesized recommendation |
| Key signals | Backlinks, keywords, page speed | Structured data, llms.txt, consistent mentions |
| Metric | Keyword rank, organic traffic | Share-of-answer |
Where they overlap
AEO is not a replacement for SEO — it’s built on top of it. Several SEO fundamentals directly help answer engines:
- Crawlable, fast pages — if a crawler can’t read your content, neither an index nor a model can use it.
- Clear, well-structured content — good headings and semantics help both rankers and models.
- Authority and consistency — being described the same way across the web builds trust for both systems.
Where they diverge
AEO weighs signals most SEO programs ignore — machine-readable llms.txt files, schema that states exactly what your product is and who it’s for, and buyer-question content written in the phrasing people actually use with a chatbot. And the measurement is different: you can rank #1 on Google and still never be named by an LLM, because ranking and recommendation are separate systems.
Which should B2B SaaS invest in?
Both — but the urgency has shifted. SEO is mature and competitive; AEO is early, which means the companies that supply clear, structured answers now tend to become the defaults models cite later. If your buyers are starting their research in ChatGPT — and increasingly they are — being invisible there is a gap no amount of SEO will close.
The pragmatic path: keep your SEO healthy, then layer AEO on top so the same content that ranks also gets you recommended. That’s exactly the work Nivonto does.