Free GEO Audit Tool: Find Out Why AI Search Engines Ignore Your Website

You rank #1 on Google. But when someone asks ChatGPT, Perplexity, or Claude about your industry — your brand never comes up. Here's how to diagnose the problem and fix it.

What Is Generative Engine Optimization (GEO)?

Generative Engine Optimization (GEO) is the practice of optimizing website content so that AI-powered search engines — ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews — can discover, understand, and cite it in their responses. Unlike traditional SEO, which focuses on link-based rankings, GEO focuses on making content extractable and trustworthy for large language models.

Research from Princeton and Georgia Tech found that GEO strategies can improve AI visibility by 115–415%, depending on the optimization technique applied.

Why Traditional SEO Tools Aren't Enough

Run your site through Ahrefs, Semrush, or Screaming Frog. You'll get a detailed picture of your traditional SEO health — Domain Rating, backlink profile, Core Web Vitals, meta tag coverage.

But none of these tools answer the questions that actually matter for AI search visibility:

These are GEO questions. And until now, answering them required manual detective work across a dozen different checks.

What Is geo-audit?

geo-audit is a free, open-source GEO audit tool built as a skill for Claude Code. It analyzes any website across four research-backed dimensions and produces a scored report with a prioritized fix plan.

One command. Full diagnosis:

In under 3 minutes, you get a complete picture of why AI systems can — or can't — discover, understand, and cite your content. For full technical documentation, see the geo-audit docs.

The 4 Dimensions of a GEO Audit

geo-audit evaluates your site across 4 dimensions, weighted by their measured impact on AI citation probability:

1. Technical Accessibility (20% of score)

This is the foundation. If AI crawlers can't reach your content, nothing else matters.

geo-audit checks access for 11 AI crawlers — GPTBot, ClaudeBot, Google-Extended, PerplexityBot, Bytespider, Applebot-Extended, CCBot, Cohere, Amazonbot, FacebookBot, and Meta-ExternalAgent. It also checks:

Common finding: Many sites that score 90+ on traditional SEO audits block GPTBot and ClaudeBot in robots.txt without realizing it.

2. Content Citability (35% of score)

This is the biggest factor. Content citability measures how easily an AI system can extract, understand, and quote a passage from your page.

geo-audit analyzes five sub-dimensions:

Common finding: Blog posts optimized for keyword density often score poorly on citability because they lack self-contained, extractable passages.

3. Structured Data (20% of score)

JSON-LD schema tells AI systems what your content is before they even read it. Proper structured data acts as a machine-readable summary that helps AI engines identify your brand, your content type, and your expertise.

geo-audit checks for:

When schemas are missing, geo-audit generates ready-to-use JSON-LD templates you can paste directly into your pages.

Common finding: Even sites with schema markup often miss sameAs on Organization schema — the property that connects your brand identity across platforms.

4. Entity & Brand Signals (25% of score)

AI systems build brand understanding from multiple sources, not just your website. If you don't exist outside your own domain, AI doesn't know how to trust or recommend you.

geo-audit checks:

Common finding: Brands with strong SEO but no Wikipedia presence or cross-platform consistency score 20–30 points lower than expected on AI visibility.

Key Research Findings Behind the GEO Score

The scoring methodology behind the GEO Score is not based on guesswork. It synthesizes insights from 101+ research sources, including the Princeton / Georgia Tech GEO paper, BrightEdge’s AI citation studies, and SparkToro’s research on zero-click search behavior.

Several key data points played a major role in shaping the weighting model:

Content optimization strategies improve AI visibility: 115–415%
Source: Aggarwal et al., Princeton / Georgia Tech (2023)
Expert quotations increase AI citation probability: +41%
Source: BrightEdge (2024)
Statistical content earns more AI citations: +30%
Source: BrightEdge (2024)
Consistent cross-source brand signals boost citation rate: 2.5×
Source: SparkToro / Zyppy (2025)

These research findings collectively inform how different signals are weighted within the GEO Score model.

GEO Score Grades

geo-audit produces a composite GEO score from 0 to 100 using the formula: Technical × 0.20 + Citability × 0.35 + Schema × 0.20 + Brand × 0.25.

85–100

AI-optimized. You're likely being cited by major AI engines.

70–84

Strong foundation. A few targeted fixes can push you to A-tier.

50–69

Significant gaps exist. A structured 30-day plan is recommended.

30–49

Major issues across multiple dimensions. Start with critical fixes.

0–29

Fundamental problems are blocking AI discovery entirely.

Every report includes prioritized issues sorted by point impact, specific fix instructions, ready-to-use JSON-LD templates, a top-5 quick wins list, and a 30-day improvement roadmap.

Diagnosis + Measurement: The Complete GEO Workflow

A GEO audit tells you what to fix. But how do you know if the fixes are working?

That's where measurement comes in. AIvsRank tracks your actual AI visibility over time — real mentions and citations across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews.

Set an AIVSRANK_API_KEY in your environment, and geo-audit automatically enriches the report with live visibility data. Without a key, the tool works fully standalone.

The workflow: Audit → Fix → Measure → Repeat.

Get Started with geo-audit

geo-audit is free and open-source under the Apache-2.0 license.

Install:

Run your first audit:

Full documentation: geo-audit docs

Source code: github.com/Cognitic-Labs/geoskills

Frequently Asked Questions

What is a GEO audit?A GEO audit is a systematic evaluation of how well a website is optimized for AI-powered search engines. It checks whether AI crawlers can access your content, whether your text is structured for citation, whether your schema markup helps AI understand your brand, and whether your entity signals are strong enough for AI systems to trust and recommend you.

How is GEO different from SEO?SEO optimizes for link-based search rankings on Google and Bing. GEO optimizes for AI-powered engines — making content discoverable, citable, and recommendable by large language models like ChatGPT, Claude, Perplexity, and Gemini. A site can rank #1 on Google but be completely invisible to AI search.

Which AI platforms does geo-audit cover?geo-audit checks crawler access for 11 AI bots: GPTBot (OpenAI/ChatGPT), Google-Extended (Gemini), ClaudeBot (Anthropic), PerplexityBot, Bytespider (ByteDance), Applebot-Extended, CCBot, Cohere, Amazonbot, FacebookBot, and Meta-ExternalAgent.

Is geo-audit really free?Yes. geo-audit is open-source under the Apache-2.0 license. All features work without any API key. The optional AIvsRank API key adds real-time visibility measurements but is not required.

What is the GEO Score formula?The composite GEO Score weights four dimensions: Technical Accessibility (20%), Content Citability (35%), Structured Data (20%), and Entity & Brand Signals (25%). The formula is: GEO Score = Technical × 0.20 + Citability × 0.35 + Schema × 0.20 + Brand × 0.25.

geo-audit is built by AIvsRank — the AI visibility measurement platform that tracks how brands appear across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews.