This article is part of our guide to the best AI SEO tools.
Here's something most business owners don't think about: right now, someone is asking ChatGPT, Perplexity, or Gemini a question that's directly relevant to what you sell. The AI either mentions your brand in the answer, or it doesn't. And you have no idea which one it is.
The good news? You don't need to spend a cent to find out. Mentionable offers eight free AI visibility tools that give you real data in minutes. No signup, no credit card, no "book a demo" form. Just answers.
Here's what each tool does and how to use them.
1. AI Visibility Check: Does AI even know you exist?
This is where everyone should start. The AI Visibility Check answers the most basic question: when someone asks an AI about your category, does your brand come up?
Enter your URL and a prompt that your ideal customer might ask (something like "best project management tools for freelancers" or "top organic skincare brands"). The tool queries ChatGPT, Perplexity, Gemini, Grok, Copilot, Google AI Mode, and Google AI Overview with that exact prompt, then analyzes each response to see if you're mentioned.
Results come back in about 60 seconds. You'll see a clear breakdown per LLM: mentioned or not, the sentiment if you are mentioned, and which competitors showed up instead.
What makes this useful isn't just the binary "yes/no." It's the competitive context. If ChatGPT recommends three competitors but not you, that's a specific gap you can work on. If Perplexity mentions you but Copilot doesn't, that tells you something about how different AI models perceive your brand.
One check won't give you the full picture, but it gives you enough to know whether AI visibility deserves your attention. For most people, the answer is a very clear yes.
2. Content Opportunity Finder: What should you write about?
You know you need content. But which topics will actually move the needle for AI visibility? The Content Opportunity Finder takes the guesswork out of that decision.
Enter your URL and the tool analyzes your niche to find the prompts and topics where AI currently discusses your category but doesn't mention you. These are your content gaps: specific opportunities where creating the right content could get you into AI recommendations.
For each opportunity, you see the topic, why it matters, and what kind of content would help fill the gap. Instead of writing blog posts and hoping for the best, you're targeting the exact areas where AI visibility is up for grabs.
This is especially useful if you're a solopreneur with limited time. You can't write about everything, so knowing which topics have the highest impact helps you prioritize. One well-targeted article that gets you into AI recommendations is worth more than ten generic blog posts that don't.
3. GEO Audit: Is your site ready for AI crawlers?
Being visible to AI isn't just about having great content. It's also about whether AI can actually access and understand your site. The GEO Audit checks both sides.
Enter any page URL and the tool evaluates four key areas:
Bot access. Can AI crawlers reach your content? Some sites inadvertently block AI bots through robots.txt rules, meta tags, or server configurations. If Googlebot-Extended or ChatGPT-User can't access your pages, you're invisible by default. The audit checks your robots.txt, identifies which AI bots are blocked, and flags any issues.
Schema markup. Structured data helps AI understand what your page is about. The audit checks for relevant schema types (Article, Product, FAQ, Organization) and validates that they're properly implemented. Missing or malformed schema means AI has to guess what your content represents.
Content quality. The audit evaluates whether your content is structured in a way that AI can parse effectively. Clear headings, logical organization, named entities, statistics with sources. These are the signals that help AI extract reliable information from your pages.
Overall AI readiness. A composite score that combines all factors into a single readability metric. You get specific recommendations for what to fix, ranked by impact.
The most common issue we see? Sites that block AI bots without realizing it. A single line in robots.txt can make your entire site invisible to ChatGPT or other AI platforms. The GEO Audit catches that in seconds.
4. llms.txt Generator: Tell AI what your site is about
The llms.txt standard is relatively new, but it's gaining traction. Think of it as a robots.txt for AI: a plain text file at the root of your site that helps large language models understand who you are, what you do, and which pages matter most.
The llms.txt Generator scans your site and creates this file automatically. It identifies your key pages, extracts your business context, and formats everything according to the llms.txt specification.
Why does this matter? AI models crawl the web to build their understanding of brands and topics. An llms.txt file gives them a clear, structured summary instead of making them piece it together from scattered pages. It's like handing someone a business card instead of making them search through your entire website.
The generator outputs a ready-to-use file. Download it, place it at yoursite.com/llms.txt, and you're done. It takes less than five minutes and removes one more barrier between your brand and AI comprehension.
Is it a magic bullet? No. But it's a simple, zero-risk improvement that costs nothing. And as more AI systems start looking for llms.txt files, having one in place early gives you a head start.
5. Page Audit: SEO and GEO checks for any page type
If you sell products online, run a blog, or maintain a FAQ, generic SEO audits miss the details that matter for AI visibility. The Page Audit is built to evaluate any page through both an SEO and a GEO lens.
It checks the fundamentals (title, meta description, headings, images, internal linking) and then layers on the structured data and AI readiness signals AI relies on when recommending content:
Schema markup. Is your page properly marked up with the right type (Product, Article, FAQ, Organization, BreadcrumbList)? AI models use schema to understand what kind of content you publish and when to surface it.
Product details (for e-commerce). Name, description, brand, images, identifiers (GTIN, SKU, MPN), Offer price, currency, availability. Incomplete or outdated Product schema is the fastest way to be skipped by AI shopping answers.
Ratings and reviews. AggregateRating and individual Review markup. Pages with visible social proof get cited more frequently by AI. If you have reviews but no schema for them, AI can't see them.
SEO and GEO factors. Meta information, image optimization, content structure, and named entity coverage. All the basics, but evaluated specifically through the lens of how AI parses pages.
The audit gives you a prioritized checklist of what's working and what needs fixing. Most pages we analyze are missing at least two or three schema elements that would improve their AI visibility. These are usually quick fixes a developer can implement in an afternoon.
6. AI Prompt Generator: What prompts matter for your niche?
Before you can track your AI visibility, you need to know which prompts to track. The AI Prompt Generator turns your URL into 5 realistic prompts your audience actually types into ChatGPT, Perplexity, and Gemini.
Enter your site. The tool reads your business context (positioning, products, audience) and outputs prompts in the user's voice. These are the questions real buyers ask AI when they're researching solutions in your space.
Use the prompts three ways. Run them through the AI Visibility Check to see if you're already mentioned. Use them as content briefs: each prompt is a topic AI is being asked about right now, which means there's organic demand for an article that answers it. Or take them into Mentionable's paid plans to track all of them on a recurring basis across multiple LLMs.
The tool also categorizes prompts by intent (informational, comparison, transactional), so you can prioritize the ones closest to the buying decision first.
7. Schema Markup Generator: Make AI understand your page
Schema is one of the strongest GEO signals you can ship. The Schema Markup Generator auto-detects the type of page you point it at and generates GEO-optimized JSON-LD you can paste straight into your <head>.
It handles the most common types out of the box: Article, Product, FAQ, Organization, BreadcrumbList, HowTo. For each, it extracts the right fields from your live page (title, description, author, dates, images, ratings, prices) and packages them according to current Schema.org and AI-search best practices.
You get a copy-paste JSON-LD block, validated against schema.org, ready for production. No code knowledge required, no dependency on a developer to ship a first version. If you've been putting off schema markup because it felt complicated, this is the fastest way to cross it off your list.
Pair it with the Page Audit: run the audit to find what's missing, then use the generator to produce the missing blocks.
8. Backlink Price Checker: Compare link prices across marketplaces
Backlinks are still one of the strongest authority signals AI uses to decide which sources to trust. But buying them through marketplaces is a mess: prices vary 5x for the same site, and you waste hours pasting URLs into ten different dashboards.
The Backlink Price Checker collapses that into one screen. Paste up to 50 URLs in bulk and instantly see availability and the best price across multiple marketplaces, side by side. No more tab juggling, no more outdated quotes.
The tool is built for solo founders, consultants, and agencies running link-building campaigns on a budget. It won't tell you whether a link is worth buying (that's a judgment call), but it removes the friction of comparing prices so you can focus on selection.
How to use these tools together
Each tool is useful on its own, but they're more powerful as a workflow. Here's the order that makes the most sense:
Step 1: Find your prompts. Use the AI Prompt Generator on your URL to get 5 realistic prompts your audience asks AI. Pick 2-3 that match your highest-value pages.
Step 2: Check your visibility. Run those prompts through the AI Visibility Check. See where you stand. This is your baseline.
Step 3: Audit your site. Run the GEO Audit on your homepage and the Page Audit on your most important product, article, or FAQ page. Fix any bot access issues first, because everything else is pointless if AI can't reach your content.
Step 4: Ship schema. Use the Schema Markup Generator on your key pages and paste the JSON-LD into your <head>. Then generate your llms.txt file and deploy it. Two quick wins, minimal effort.
Step 5: Find content gaps. Use the Content Opportunity Finder to identify where to focus your content efforts. Create content for the highest-impact opportunities first.
Step 6: Shop authority. If you're investing in backlinks, run your shortlist through the Backlink Price Checker before you buy anything. It pays for itself in saved time.
Step 7: Re-check visibility. After implementing fixes and publishing new content, run the AI Visibility Check again with the same prompts. Compare results. See what changed.
This entire workflow takes about an hour and a half. And it gives you a clearer picture of your AI visibility than most people get with paid tools they never fully use.
When free tools aren't enough
Free tools give you snapshots. They're perfect for understanding where you stand right now, identifying problems, and making quick improvements.
But they don't track changes over time. They don't alert you when a competitor takes your spot in AI recommendations. They don't automatically generate 40-80 prompts most relevant to your business and monitor them across multiple LLMs on a regular schedule.
That's what Mentionable's paid plans are for. If you run these free tools and realize AI visibility matters for your business (and for most businesses, it does), the natural next step is continuous tracking.
The Growth plan at 79 euros per month tracks 40 prompts across 3 LLMs of your choice (from ChatGPT, Perplexity, Gemini, Grok, Copilot, Google AI Mode, and Google AI Overview) with automated monitoring. It includes competitor analysis, traffic analytics, email alerts, and native MCP access so you can query your visibility data from Claude Desktop, Cursor, or ChatGPT. Pro (80 prompts, 4 LLMs) and Agency (€299/month, 5,000 credits, unlimited projects, up to 7 LLMs, white-label, one-shot GEO audit) scale from there. You can start with a 4-day free trial on any plan.
But here's the honest take: if you're just starting to think about AI visibility, the free tools are more than enough. Use them, fix what they surface, and upgrade when you're ready for ongoing monitoring. No rush.
Related articles
- Best GEO Tools -- the complete GEO stack: tracking + content + schema + llms.txt
- Best AI SEO Tools in 2026 -- the broader landscape of traditional and AI-native tools
- 9 Best AI Visibility Tools -- the full paid tool comparison
