Practical Guides

Free GEO Tools: Essential Resources for AI Visibility

2026-03-21·5 min read

You don't need a big budget to start working on your AI visibility. Free tools let you diagnose, measure and start improving your presence in the main AI models. Here are some useful ones.

Why Use an AI Visibility Measurement Tool?

Many businesses find that their brand doesn't appear when someone asks ChatGPT, Gemini or Perplexity about their industry. Without measuring, there's no way to know: your analytics don't record when ChatGPT mentions a competitor instead of you.

An AI visibility tool does something that's hard to do consistently by hand: it generates relevant questions for your industry, sends them to one or more AI models and analyzes whether your brand appears, in what position, with what sentiment and alongside which competitors.

You can do this by hand: write the questions down, run them in each model, and record the date, the model and what the answer said about your brand. The time it takes depends on how many questions and models you cover, and the record only stays comparable if you repeat the same procedure each time.

Diagnostic and Analysis Tools

Mentio (Free Plan)

Mentio's free plan includes three analyses in one AI model (OpenAI). You enter your brand and industry, and the tool generates questions in your market's language, collects the answers and returns a report with your visibility, position and sentiment. Adding competitors to compare against requires a paid plan. It supports several languages, including English and Spanish.

Paid plans let you choose models: Personal one of the five (ChatGPT, Claude, Gemini, Grok or Perplexity), Pro two of the five, and Enterprise all five. Questions are generated in your market's language rather than translated.

HubSpot AI Search Grader

HubSpot offers a free tool that evaluates how AI models describe your brand. It gives a general visibility score, sentiment analysis and recommendations. It's a reasonable starting point; check which languages and models it currently covers.

Mangools AI Search Grader

Another free option that evaluates your visibility across several AI models. It gives a quick diagnosis; check its current model list and methodology before comparing results with other tools.

The Manual Method (Free but Laborious)

The most basic, completely free way is to ask AI assistants directly. Open ChatGPT (chatgpt.com), Claude (claude.ai) and Gemini (gemini.google.com) and ask the questions 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 limited: it's slow, not systematic, answers vary each time, and tracking changes over time is hard. It works as an initial diagnosis but not as a long-term method.

Complementary Tools (SEO That Supports GEO)

Google Search Console (Free)

Although it's an SEO tool, Search Console shows how visible your website is in Google Search. That matters for AI answers that rely on search results, such as Google's AI Overviews.

Schema.org Markup Validator (Free)

Validates that your structured data is correct. Accurate Schema.org markup describes what your brand is and offers in a machine-readable way; it doesn't guarantee that AI will mention you.

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, though focused on English-language markets. You can see the full Mentio vs Geoptie comparison to understand the differences.

When Do You Need a Paid Tool?

Free tools are fine for an initial diagnosis and for brands starting to explore GEO. But they have limits.

A paid tool makes sense when you want to repeat analyses and compare results over time, compare yourself with several competitors systematically, manage several brands (agencies), prepare reports for clients or executives, or get AI-generated recommendations on how to improve.

In those cases, Mentio's paid plans (Personal from €29/month; Pro, with more models and AI recommendations, from €79/month) offer more analyses, more models and competitor comparisons. See Mentio's plans for all options.

How to Analyze Your ChatGPT Visibility Step by Step

To check your visibility in ChatGPT quickly and for free:

Go to Mentio and create a free account
Enter your brand, industry and market
Mentio generates questions your customers would ask AI
In a few minutes you get a report with your visibility and position (competitor comparison requires a paid plan)

For a broader diagnosis, you can also try the Semrush AI Visibility Checker (free) or the HubSpot AI Search Grader. Mentio generates questions in your market's language rather than translating generic ones.

Try Mentio for free →

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