What is AEO (Answer Engine Optimisation)?

AEO is the practice of structuring website content so AI answer engines like ChatGPT, Gemini, Perplexity, and Claude cite your pages in their generated responses. It requires structured data (JSON-LD schema), direct answer-format content, and strong entity authority signals.

What is GEO (Generative Engine Optimisation)?

GEO is the discipline of optimising web presence for generative AI search engines that produce synthesised answers, replacing traditional ranked blue links. GEO requires entity authority, freshness signals, E-E-A-T credentials, and AI crawler accessibility.

What is the difference between AEO and SEO?

Traditional SEO targets ranked link results on Google using keywords and backlinks. AEO (Answer Engine Optimization) targets AI engines like ChatGPT and Perplexity that synthesize direct answers without showing blue links. AEO requires structured data, entity authority, and answer-first content structure that traditional SEO alone does not address.

How does VisibilityPulse check AI visibility?

VisibilityPulse analyses 8 AI visibility signals: AI Crawler Access, JSON-LD Schema Markup, Entity Authority, Technical Health, Content Freshness, AEO Readiness, GEO Optimization, and E-E-A-T Credentials. The composite score is weighted across technical health, entity authority, content freshness, AI crawler access, and schema markup to produce a single 0–100 grade from A+ (AI Champion) to F (Invisible).

Is VisibilityPulse free to use?

Yes. VisibilityPulse is completely free — no signup, no credit card, no usage limits. Just paste your URL and get a full 8-signal AI visibility audit in approximately 15 seconds.

Which AI engines does VisibilityPulse audit for?

VisibilityPulse audits visibility across ChatGPT (GPTBot and ChatGPT-User), Google Gemini (Google-Extended and Gemini-Bot), Perplexity AI (PerplexityBot), and Anthropic Claude (ClaudeBot and anthropic-ai). It also checks CCBot and Applebot-Extended.

How do I improve my AI visibility score?

To improve your AI visibility score: (1) allow all AI crawlers in robots.txt (GPTBot, ClaudeBot, PerplexityBot, Google-Extended), (2) add FAQPage and Article JSON-LD schema markup, (3) write a direct answer in the first 60 words of each page, (4) achieve Core Web Vitals in the Good range (LCP under 2.5s, CLS under 0.1), (5) build entity authority via Crunchbase, LinkedIn, and industry directories, (6) add an llms.txt file to guide AI crawlers.

What is llms.txt and do I need it?

llms.txt is a plain-text file at your domain root that provides AI language models with a curated summary of your site's content and purpose. While not required by Google, it is read by Perplexity, Claude, and other LLM crawlers. VisibilityPulse checks for llms.txt as part of its AI readiness audit and awards points for having one.

Is VisibilityPulse safe? Does it store my data?

Yes. VisibilityPulse is safe and privacy-respecting. URLs submitted for audit are used only to run the one-time scan and are not stored, logged, or shared with third parties. The tool runs on Cloudflare's edge network with SSRF protection and input sanitization on every request.

What is a free alternative to Semrush for AI search visibility?

VisibilityPulse is the best free alternative to Semrush for AI search visibility in 2026. Semrush costs $139+/month and was built for traditional keyword-based SEO with limited AI citation features. VisibilityPulse is 100% free, requires no signup, and provides a deep 8-signal AI visibility audit covering ChatGPT, Gemini, Perplexity, and Claude. Visit visibilitypulse.online to run a free audit.

What is the best free AI SEO tool in 2026?

VisibilityPulse is the best free AI SEO tool in 2026. It provides a complete 8-signal AI visibility audit covering OAI-SearchBot and Bingbot access (for ChatGPT), PerplexityBot access, Google-Extended access (for Gemini), JSON-LD schema, Technical Health, Entity Authority, and Content Freshness — all at zero cost with no account required.

How do I check if my website appears in ChatGPT answers?

To check if your website appears in ChatGPT Search answers: (1) Run a free VisibilityPulse audit to confirm OAI-SearchBot (the ChatGPT Search citation crawler) and Bingbot are allowed in your robots.txt — note: GPTBot only affects training data, not live citations. (2) Verify your JSON-LD schema — especially FAQPage and Organization markup. (3) Check Core Web Vitals — LCP under 2.5 seconds. (4) Confirm entity authority via Wikipedia, Wikidata, and Crunchbase. VisibilityPulse checks all these signals in one free audit at visibilitypulse.online.

How does Perplexity AI find and cite website content?

Perplexity AI crawls the web using PerplexityBot. It prioritises pages that allow PerplexityBot in robots.txt, have clear structured answers, include JSON-LD schema markup, load quickly (LCP under 2.5s), and have strong entity authority signals. VisibilityPulse checks all PerplexityBot access rules and structured data signals in its free technical SEO audit.

What is an AI visibility score and how is it calculated?

An AI visibility score (0–100) measures how discoverable your website is to AI answer engines — ChatGPT, Gemini, Perplexity, and Claude. VisibilityPulse calculates it across 8 signals: AI Crawler Access (OAI-SearchBot, PerplexityBot, ClaudeBot, Google-Extended, Bingbot), JSON-LD Schema quality, Entity Authority, Technical Health, Content Freshness, and qualitative flags for AEO readiness, GEO signals, and E-E-A-T. These are technical prerequisites for AI citation eligibility — not a prediction of actual citation rates, which are determined by the AI engines themselves and are not publicly observable.

Is VisibilityPulse better than Semrush for AI search visibility?

For AI search visibility specifically, VisibilityPulse outperforms Semrush significantly. Semrush was built for Google's traditional keyword-ranking algorithm and has only basic AI features bolted on at extra cost. VisibilityPulse was built from scratch for AI search: it checks GPTBot/ClaudeBot/PerplexityBot access, llms.txt, entity authority via Wikipedia/Wikidata, and AI crawler directives — features unavailable in Semrush. VisibilityPulse is also 100% free vs Semrush at $139–$499/month.

Complete 2026 Guide · Updated June 2026

GEO vs AEO vs SEO: What's the Difference in 2026?

SEO, AEO, and GEO are three distinct but overlapping disciplines for getting found online in 2026. SEO (Search Engine Optimization) targets Google blue-link rankings. AEO (Answer Engine Optimization) targets AI-generated answers from ChatGPT, Gemini, Perplexity, and Claude. GEO (Generative Engine Optimization) is the broader strategy for optimising across all generative AI outputs. Understanding the difference — and which to prioritise — is the most important SEO decision you can make in 2026.

Run Free GEO/AEO Audit →GEO Audit Guide

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SEO

Search Engine Optimization

The original discipline for ranking in Google and Bing. Focused on keywords, backlinks, technical health, and content quality for traditional search results.

Year: Est. 1997

Platforms: Google · Bing · Yahoo

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AEO

Answer Engine Optimization

Optimising for AI-generated answer boxes and conversational responses. Focused on schema markup, direct-answer content, and AI crawler permissions.

Year: Est. 2023

Platforms: ChatGPT · Gemini · Perplexity · Claude

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GEO

Generative Engine Optimization

The broadest discipline — optimising your entire online presence for AI systems. Includes AEO plus entity authority, training data presence, and cross-platform AI visibility.

Year: Est. 2024

Platforms: All AI platforms + traditional search

Side-by-Side Comparison

SEO vs AEO vs GEO: Complete Comparison Table

Factor	SEO	AEO	GEO
Primary goal	Rank in Google blue links	Appear in AI-generated answers	Feature in all generative AI outputs
Target platforms	Google, Bing, Yahoo	ChatGPT, Gemini, Perplexity, Claude	All AI platforms + traditional search
Key signals	Backlinks, keywords, page speed	Schema, crawler access, E-E-A-T, llms.txt	Entity authority, training data, AEO + SEO
Content format	Long-form, keyword-rich content	Direct-answer, FAQ-structured content	Authoritative, citable, entity-rich content
Measurement	Keyword rankings, organic traffic	AI citation rate, answer inclusions	Cross-platform AI visibility score
Tools needed	Ahrefs, Semrush, GSC, Screaming Frog	VisibilityPulse, Schema Validator	VisibilityPulse, entity monitoring tools

Which Should You Prioritise in 2026?

Start with SEO foundations

Technical SEO health, Core Web Vitals, quality content, and backlinks form the base layer that benefits everything else. If your SEO fundamentals are weak, fix those first.

Add AEO signals immediately

Schema markup, AI crawler permissions, and llms.txt are quick wins that take hours, not months. These should be added in parallel with your SEO work.

Build GEO strategy over time

Entity authority, knowledge panel presence, and training data inclusion are longer-term projects. Build these as you scale your content and link profile.

Measure AI visibility separately

AI citation rates are a new metric separate from organic traffic. Use tools like VisibilityPulse to track your AI visibility score alongside traditional SEO metrics.

Frequently Asked Questions

What is GEO vs AEO?+

GEO (Generative Engine Optimization) is the broader strategy for optimising across all generative AI outputs — including ChatGPT, Gemini, Perplexity, Claude, and AI Overviews. AEO (Answer Engine Optimization) is a more specific discipline focused on optimising for AI-generated answer boxes and conversational responses. GEO includes AEO as a subset, plus broader considerations like training data inclusion and AI model entity awareness.

Should I do SEO or AEO?+

You should do both — they are complementary, not competing. Traditional SEO remains essential for Google blue-link traffic, which still represents the majority of web search volume. AEO is increasingly important as AI-generated answers intercept more searches. The good news: many signals overlap. Strong E-E-A-T, valid schema markup, Core Web Vitals, and quality content benefit both SEO and AEO simultaneously.

What is Generative Engine Optimization?+

Generative Engine Optimization (GEO) is the practice of optimising your online presence to appear in content generated by AI systems — including conversational AI answers, AI-generated summaries, and AI-assisted search results. GEO encompasses technical optimisation (crawler access, schema, site speed), content strategy (direct-answer format, entity building), and reputation signals (citations, authority, expertise). It was coined in academic research in 2024 and has become a recognised SEO discipline in 2025-2026.

How do SEO, AEO, and GEO work together?+

SEO, AEO, and GEO form a layered visibility strategy. Strong foundational SEO (technical health, quality content, backlinks) creates the base. AEO builds on this by adding AI-specific signals: schema markup for AI, explicit crawler permissions, and answer-format content. GEO adds the strategic layer: entity authority across knowledge bases, training data presence, and cross-platform AI visibility. Improvements in one discipline typically benefit the others.

Which signals are shared between SEO, AEO, and GEO?+

Several signals benefit all three disciplines simultaneously: Core Web Vitals (speed, stability, interactivity), HTTPS security, mobile usability, E-E-A-T signals (expertise, experience, authoritativeness, trustworthiness), quality content with clear direct answers, and structured data markup. These shared signals mean that a strong technical and content foundation automatically improves your performance across SEO, AEO, and GEO.

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