Practical Guides

Free GEO Tools: Essential Resources for AI Visibility

2026-03-21·5 min read

You don't need a huge budget to start working on your AI visibility. There are free tools that allow you to diagnose, measure, and begin improving your presence in major LLMs. Here are the most useful ones.

Why Do You Need an AI Visibility Measurement Tool?

More and more businesses worldwide are discovering that their brand doesn't appear when someone asks ChatGPT, Gemini, or Perplexity about their industry. The problem is that without an AI visibility measurement tool, there's no way to know. Your analytics don't track when ChatGPT talks about your competitor instead of you.

An AI visibility measurement tool for ChatGPT (or any other LLM) does something you can't reliably do manually: it generates relevant questions for your industry, sends them to multiple AI models, and analyzes whether your brand appears, in what position, with what sentiment, and alongside which competitors.

It's like having an AI visibility tracker that monitors your presence across ChatGPT, Gemini, Perplexity, Claude, and Grok — something that would take you hours to do manually with inconsistent results.

Whether you're looking to analyze your ChatGPT visibility, measure your Gemini presence, or track your Perplexity visibility, these tools automate the process and give you actionable data.

Diagnostic and Analysis Tools

Mentio (Free Plan)

Mentio offers a free plan that allows complete AI visibility analysis. You enter your brand and industry, and the tool generates native-language questions, queries ChatGPT, Claude, Gemini, Grok, and Perplexity, and returns a report with your visibility, position, sentiment, and recommendations. It supports multiple languages natively, including English and Spanish.

Mentio works as an all-in-one visibility tracker for ChatGPT, Gemini, Claude, Grok, and Perplexity. You can analyze your AI visibility automatically with questions generated in your market's native language — not generic translations.

HubSpot AI Search Grader

HubSpot offers a free tool that evaluates how LLMs interpret your brand. It provides a general visibility score, sentiment analysis, and personalized recommendations. It's a good starting point, although it works primarily in English and doesn't allow as deep analysis as paid tools.

Mangools AI Search Grader

Another free option that evaluates your visibility across multiple LLMs including ChatGPT, Perplexity, Claude, Grok, and DeepSeek. It offers a quick diagnosis although with less depth than specialized tools.

The Manual Method (Free but Laborious)

The most basic and completely free way is to ask LLMs directly. Open ChatGPT (chat.openai.com), Claude (claude.ai), and Gemini (gemini.google.com), and ask questions that your potential customers would ask. Note the results in a spreadsheet. If you don't know where to start, review the most common mistakes that make AI ignore your brand to know what to look for.

This method is free but has limitations: it's slow, not systematic, responses vary each time, and you can't easily track evolution. It works as an initial diagnosis but not as a long-term strategy.

Complementary Tools (SEO That Reinforces GEO)

Google Search Console (Free)

Although it's an SEO tool, Search Console helps you understand how visible your website is to Google, which directly influences your GEO. LLMs tend to cite sources with good domain authority.

Schema.org Markup Validator (Free)

Validates that your structured data is correct. Good Schema.org markup helps AI systems understand what your brand is, what it offers, and how it relates to your industry.

Geoptie (Free Tools)

Geoptie offers several free tools without registration: GEO audit, content checker, AI keyword finder, and rankings tracker. They're useful as supplements, although they're focused on the Anglo-Saxon market. You can see the full Mentio vs Geoptie comparison to understand the differences.

When Do You Need a Paid Tool?

Free tools are perfect for an initial diagnosis and for brands just starting to explore GEO. But they have important limitations.

You need a paid tool when you want to run recurring analyses and compare evolution, when you need to compare yourself with multiple competitors systematically, when you manage multiple brands (agencies), when you need professional reports for clients or executives, or when you want actionable AI-generated recommendations on how to improve.

In these cases, tools like Mentio Pro (from €29/month) offer deeper analysis, multiple LLMs, advanced competitive intelligence, and personalized recommendations that more than justify the investment. Check Mentio's plans to see all options.

How to Analyze Your ChatGPT Visibility Step by Step?

If you want to analyze your ChatGPT or other LLM visibility quickly and for free, follow these steps:

Go to Mentio and create a free account
Enter your brand, industry, and market
Mentio automatically generates questions your customers would ask AI
In less than 2 minutes you receive a report with your visibility, position, and competitors

For a broader diagnosis, you can also try the Semrush AI Visibility Checker (free) or the HubSpot AI Search Grader. Mentio's key differentiator is that it generates questions in your market's native language — not generic translations.

Conclusion

Getting started with GEO doesn't require investment. Free tools allow you to diagnose your situation and understand where you stand. But if you want to improve systematically, measure your progress, and outpace your competition in AI visibility, paid tools are the natural next step.

The important thing is to start. Every day that passes without measuring your AI visibility is a day your competition could be gaining ground in ChatGPT, Claude, and Gemini without you knowing.

Try Mentio for free →

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