AEO (AI Engine Optimization) focuses on getting your product recommended by AI assistants like ChatGPT and Perplexity. GEO (Generative Engine Optimization) focuses on appearing in AI-generated search results. SEO (Search Engine Optimization) focuses on ranking in traditional Google search. They overlap significantly but target different systems. Most SaaS teams in 2026 need SEO + AEO together — here's how they compare and when each matters.
The Quick Answer
- SEO = Optimize for Google's ranking algorithm. You want to rank on page 1 for your target keywords.
- AEO = Optimize for AI assistants (ChatGPT, Perplexity, Gemini, DeepSeek, Claude, Mistral). You want to be recommended when someone asks an AI for advice.
- GEO = Optimize for AI-generated search results (Google AI Overviews, Perplexity answers). You want your content cited in AI-generated summaries.
In practice, AEO and GEO are converging — the same techniques work for both. SEO remains a separate discipline with some overlap.
SEO: What It Is and Where It Falls Short
SEO has been the foundation of digital marketing for 20+ years. You optimize your pages with keywords, build backlinks, improve page speed, and earn trust through domain authority. Google's algorithm ranks you based on these signals.
The problem: AI assistants don't use Google's algorithm. When someone asks ChatGPT 'what's the best project management tool?', ChatGPT doesn't check Google rankings. It synthesizes an answer from its training data and (in some cases) live web retrieval. Your #1 Google ranking means nothing if ChatGPT doesn't know your product exists.
Key insight: We've seen SaaS tools ranking #1 on Google for their main keyword that don't appear in any ChatGPT or Perplexity responses. SEO visibility and AI visibility are completely independent metrics.
AEO: AI Engine Optimization
AEO is the practice of making your product discoverable and accurately described by AI assistants. The term was coined to distinguish this from traditional SEO — because the optimization targets are fundamentally different.
What AEO optimizes for:
- Training data representation — Is your product well-documented across the web? AI models learn from internet text. More high-quality mentions = better representation.
- Answer-first formatting — 72% of pages cited by AI engines put the core answer in the first 40-60 words. AI models extract these direct answers.
- Structured data (JSON-LD) — Schema markup helps AI engines parse your product's features, category, and pricing accurately.
- Entity consistency — Using the same product name, description, and positioning everywhere helps AI engines build a confident internal model of what your product does.
- Freshness signals — 76% of top-cited pages were updated within 30 days. Stale content falls out of AI answers.
- Comparison content — AI engines love structured comparisons. Pages that explicitly compare your product to alternatives are more likely to be cited.
AEO covers all AI assistants: ChatGPT, Perplexity, Gemini, DeepSeek, Claude, and Mistral. Each engine has different biases, but the optimization principles are the same.
GEO: Generative Engine Optimization
GEO is a term coined by researchers to describe optimization specifically for generative AI search results. The most prominent example is Google AI Overviews — the AI-generated summary boxes that appear at the top of Google search results.
GEO and AEO overlap heavily. The core difference is scope:
- GEO focuses specifically on search-integrated AI (Google AI Overviews, Perplexity search, Bing Copilot).
- AEO covers all AI assistants, including conversational ones (ChatGPT, Claude, DeepSeek) that aren't search engines.
In practice, the optimization techniques are nearly identical. If you optimize for AEO, you're also optimizing for GEO. We prefer the AEO framing because it's broader — it covers the full spectrum of AI engines that potential customers use to discover products.
AEO vs SEO: Side-by-Side Comparison
- Target: SEO targets Google's ranking algorithm. AEO targets AI assistant response generation.
- Key signals: SEO relies on backlinks, keywords, page speed. AEO relies on structured data, entity consistency, answer-first content.
- Measurement: SEO measures rankings and organic traffic. AEO measures citation rate across AI engines (score 6-18).
- Timeline: SEO changes take weeks-months to impact rankings. AEO changes can be reflected in AI responses within days (for retrieval-augmented engines like Perplexity).
- Cost: SEO tools ($100-500/mo for Ahrefs, SEMrush). AEO tools ($29-99/mo for most, some free tiers).
- Overlap: Both benefit from clear, structured, authoritative content. Good AEO content also tends to rank well in SEO.
Do You Need Both SEO and AEO?
Yes — but the priority depends on your growth stage:
- Pre-launch / early stage: Focus on AEO first. You need AI engines to know you exist. A free AEO audit is the fastest way to see where you stand.
- Growing (1-100 customers): Do both. SEO drives organic search traffic. AEO ensures AI assistants recommend you when asked.
- Established (100+ customers): AEO becomes critical for defense. Competitors will try to steal your AI visibility. Daily monitoring catches changes early.
The companies that dominate both Google rankings AND AI citations will own their categories. Ignoring either channel leaves revenue on the table.
Which Term Should You Use?
The industry hasn't settled on a single term yet. You'll see AEO, GEO, LLM SEO, AI SEO, and 'AI visibility optimization' used interchangeably. Here's our take:
- AEO (AI Engine Optimization) — Best term for the full scope. Covers all AI engines, not just search-integrated ones.
- GEO (Generative Engine Optimization) — Good for academic contexts or when specifically discussing AI search results.
- AI SEO — Intuitive but misleading. It implies AI is an extension of SEO, when it's actually a separate channel.
- AI visibility — Plain English, works well in business contexts. 'How's our AI visibility?' is a natural question.
We use AEO at EurekaNav because it most accurately describes what we measure: how AI engines cite and recommend your product.
How to Get Started With AEO
The fastest way to understand your current AI visibility is to run a free audit. EurekaNav's free AEO audit queries 6 AI engines (ChatGPT, Perplexity, Gemini, DeepSeek, Claude, Mistral) in real time and shows you exactly where you're visible and where you're invisible.
- Takes 30 seconds, no signup required.
- Score from 6 (invisible everywhere) to 18 (cited by all engines).
- Specific recommendations for what to fix.
Try it free at eurekanav.com/aeo/free-audit
