What is AEO? The Complete 2026 Guide
Methodology-first explanation of AI Engine Optimization: what it is, how it differs from traditional SEO, the 8 major LLM engines, and the AIS Index scoring framework (Visibility 40%, Authority 30%, Sentiment 20%, Adversarial 10%).
The guides you need before you start optimizing. Covers the methodology, the tools landscape, and the ROI case.
Interactive tools to benchmark your current position and calculate the value of improving it.
The infrastructure layer: structured files and schema that make your content machine-readable by LLMs.
Neutral, data-driven comparisons of the major AEO platforms. We're the analyst, not a participant.
Know your AIS score before optimizing
74% of brands score below 40/100. Free scan across ChatGPT, Claude, Perplexity, and Gemini — 60 seconds.
What is AEO and why does it matter in 2026?
AEO, or Answer Engine Optimization, is the discipline of optimizing a brand's online presence to be cited by large language models when they answer user queries. AEO matters because 40%+ of buyers under 35 now use ChatGPT or Perplexity for product research before Google.
How is AEO different from traditional SEO?
Traditional SEO targets Google ranking signals — backlinks, E-E-A-T, Core Web Vitals. AEO targets LLM citation signals — training-data breadth, third-party authoritative mentions, schema markup parseability, and brand disambiguation. The two share 60–70% of tactics but diverge on signal sources.
Does AEO require a separate content strategy?
AEO layers on top of SEO. Most AEO wins come from reinforcing E-E-A-T outside the brand's own site — directory listings, Wikipedia or Wikidata entries, named-tier trade press coverage, and an llms.txt file — rather than from new content production alone.
What is the AIS Index and how is it calculated?
The AIS Index is a 0 to 100 aggregation of four components: Visibility (40%) measuring share of voice across 24 buyer-intent prompts; Authority (30%) measuring citation breadth across trusted third-party domains; Sentiment (20%) measuring tone and accuracy; and Adversarial (10%) measuring resistance to competitor hullucination.