AEO vs SEO — what's actually different
On May 15, 2026, Google published its AI Optimization Guide and stated plainly: there is no separate playbook for AI Overviews. GEO and AEO are still SEO. What changed isn't the work — it's the measurement surface. Here's the honest breakdown.
The two-line definition
What overlaps and what doesn't
- Overlap: E-E-A-T signals, schema markup, crawlable HTML, internal linking, original research, and earned third-party mentions help both surfaces.
- Overlap: Google AIO and Gemini ground in the Google index — so classic Google SEO directly drives AIO citations.
- Divergence: ChatGPT grounds in Bing — Bing's index weights different signals than Google. Same brand, different surface rate.
- Divergence: Claude grounds in Brave — a smaller, structurally different index. Surface rates run 30-40 points lower than ChatGPT.
- Divergence: Perplexity runs its own index plus live web fetches — citation density is higher than any other surface.
- Practical: you can't replace SEO with AEO, you bundle them. Same canonical content; two measurement layers.
Frequently asked
What is the difference between AEO and SEO?
SEO (Search Engine Optimization) optimises pages to rank in classic blue-link results on Google, Bing, and other engines. AEO (Answer Engine Optimization) optimises content to be cited or extracted by AI answer engines — ChatGPT, Google AIO, Gemini, Claude, Perplexity. The work overlaps heavily: clean structure, strong entity signals, trustworthy sources, and crawlable HTML help both. The measurement surface differs — AEO needs Brand Radar-style query dispatching across LLMs; SEO needs classic rank tracking.
Did Google really say GEO and AEO are still just SEO?
Yes. Google's May 15, 2026 AI Optimization Guide explicitly stated that there is no separate playbook for AI Overviews — the same E-E-A-T fundamentals, the same content quality signals, the same structured data, and the same crawlability rules apply. Google AIO is powered by Gemini 3 running RAG over the same Google index that powers classic search. The distinction isn't 'new playbook' — it's 'new measurement surface for the same playbook'.
If GEO/AEO is still SEO, why do I need a separate tool?
Because the measurement surface is genuinely new. Classic rank trackers tell you position-1 vs position-5 in blue-link SERPs. They don't tell you whether ChatGPT recommends you when a buyer asks 'best [category] tool', whether Claude cites your docs, or which of your URLs Perplexity grounds on. You still need rank tracking — and you also need Brand Radar-style measurement across the four AI indexes (Bing for ChatGPT, Brave for Claude, Google for AIO+Gemini, Perplexity's own).
What overlaps between AEO and SEO content work?
Almost everything that's worth doing. Clear H1/H2 structure, definitional answers near the top, schema markup, internal linking to canonical pages, fast load, mobile-friendly layout, original research, citing primary sources, and earned mentions on third-party sites. The same content that wins position-1 in Google generally wins a citation in AIO and Gemini — because AIO grounds in the Google index. The divergence appears on Claude (Brave index) and ChatGPT (Bing index) where the underlying ranking signals differ.
How does Citare measure both AEO and SEO?
One platform, both surfaces. Classic SEO: Site Explorer, Keywords Explorer, Rank Tracker, Site Audit, Content Explorer (Ahrefs-class depth via DataForSEO backend). AI search: Brand Radar dispatch across all 5 surfaces — ChatGPT, AIO, Gemini, Claude, Perplexity — with persona-anchored queries. Bundled at every tier from $35/mo. No separate $99 AI addon.
Measure both surfaces in one place
Classic SEO suite plus 5-platform AI Brand Radar, bundled at every tier from $35/mo. Free forever for 1 project.