The best free AI visibility checkers in 2026
The best free AI visibility checker depends on which question you’re asking: Ahrefs’ free checker is the strongest for whether AI assistants mention your brand, and AIOScan (ours) is built for whether AI systems can read your site at all. Those two questions get confused constantly, no single free tool answers both, and this roundup tells you which tool answers which. One disclosure up front: AIOScan is our tool. We’ve labeled it as ours everywhere it appears, and we’d rather earn the comparison than fake neutrality. Every price, limit and feature claim below was re-checked on each vendor’s own page on October 9, 2026.
What should a free checker actually tell you?
Something you can act on, which is rarer than it sounds. A useful checker either surfaces a fixable problem, like a firewall blocking GPTBot, or gives you a defensible baseline, like how AI models currently describe your brand. Be suspicious of any score whose methodology is unpublished, because unverifiable numbers are this category’s chronic disease.
The research base for what matters is public: Ahrefs’ 1.4M-prompt study on what gets cited, and Surfer’s finding that almost 40% of citations come from a page’s first 100 words, are the standards we’d hold any checker to, including ours.
Ahrefs AI Visibility Checker: best free mention and citation snapshot
Ahrefs’ free AI Visibility Checker takes a brand name and reports how often ChatGPT, Gemini, Perplexity, Copilot, Google AI Overviews and AI Mode mention it, which topics trigger those mentions, and which domains and pages get cited alongside you. No signup, no card, and no cap on how many brands you check, including competitors.
The free report is a preview by design: the top 5 results per section, as a one-time snapshot with no history or competitor comparison. Tracking over time is Ahrefs’ paid Brand Radar, from $199/month. For a fast read on whether AI names you at all, nothing free covers more platforms.
Semrush AI Visibility Checker: best free score for a domain
Semrush’s free checker works from a domain rather than a brand name and returns a 0 to 100 AI Visibility Score with mentions, citing pages, topics and prompts, and estimated audience reach across ChatGPT, Gemini, AI Mode and AI Overviews. It needs no account, with a limit of three checks a day.
Like every score in this category, the number is Semrush’s own composite, and ongoing prompt tracking sits in its paid AI Visibility Toolkit. Useful as a second brand-side baseline next to Ahrefs, since the two sample different prompts.
HubSpot AEO Grader: best free read on how AI describes you
HubSpot’s AEO Grader asks for your company name, location, products or services, and industry, then reports how OpenAI’s GPT-5.4 mini, Perplexity and Gemini talk about your brand, scoring sentiment, presence, recognition, share of voice, and competitive position out of 100. No account is needed, though you complete a short form to see the full report.
Where Ahrefs counts mentions, HubSpot judges tone, which is the question executives actually ask. Its limits are the flip side of that design: it measures perception, not your website, so it can’t tell you why you’re invisible or what to change. Ongoing tracking is HubSpot’s paid AEO product at $50/month. Our full review covers what it checks and misses.
Mangools AI Search Grader: free brand ranking across models
Mangools’ AI Search Grader takes a brand and a short niche description, writes test prompts from them, and reports how often and how high the brand appears, as a 0 to 100 score with competitor insights. Without an account it runs three models (ChatGPT, Mistral and Llama); a free account adds Claude, Gemini and DeepSeek. Usage is limited, and Mangools doesn’t publish the caps.
AIOScan: best free on-page scan (ours)
AIOScan is our tool, and it answers the other question: can AI systems retrieve, parse, and cite your site? It runs 21 deterministic checks, including a real fetch of your page with an AI-crawler user agent that catches firewall blocks robots.txt checks miss, plus raw-HTML content checks and answer-shape analysis.
Every weight is published with its supporting research, the full report is free with no email gate, results come with an AI-written prioritized analysis, and each report has a shareable link.
Its limits, stated as plainly as everyone else’s: AIOScan doesn’t monitor what AI says about your brand, doesn’t track prompts over time, and only scans one page at a time. It tells you whether you can appear in AI answers and exactly what to fix, not where you currently do appear. For that second job you want a monitoring tool, which is what the next entries sell.
llmrefs’ crawlability checker: a second opinion on access
llmrefs is a keyword-tracking platform for AI search at $79/month (marked as a limited-time price, with a 7-day trial), and it ships a free AI crawlability checker that is the closest thing to our scan on this list. It fetches your page as GPTBot, shows the text a crawler can read without JavaScript, flags 402, 403 and 429 blocks, and reviews schema and meta tags. No credit card needed.
It’s a reasonable second opinion on the access question. The main product’s focus on aggregated keyword rankings rather than one-off prompt screenshots is a methodologically honest angle in a category that needs more of that.
Which checkers are completely free with no signup?
Four give you a result with no account at all: AIOScan, Ahrefs, Semrush and llmrefs’ crawlability checker. HubSpot needs a short form, and Mangools works without an account but adds models if you make a free one. Everything else in this category is a paid platform or a trial with a clock on it. Here is the honest classification:
| Tool | What it measures | Really free? | Signup? |
|---|---|---|---|
| AIOScan (ours) | Whether AI systems can retrieve, parse, and cite your site | Yes, full report | No |
| Ahrefs AI Visibility Checker | How often 6 AI platforms mention and cite your brand | Yes, top-5 preview | No |
| Semrush AI Visibility Checker | AI Visibility Score for a domain across 4 Google and OpenAI surfaces | Yes, 3 checks a day | No |
| HubSpot AEO Grader | How AI models describe your brand | Yes, one-time snapshot | No account, short form |
| Mangools AI Search Grader | Brand ranking in AI answers to generated prompts | Yes, limited use | Optional, adds models |
| llmrefs crawlability checker | AI crawler access to one page | Free side tool of a $79/month platform | No card |
| Otterly.ai | Brand mentions across 4 AI surfaces | Free trial, then from $29/month | Yes |
| Peec AI | Prompt tracking for marketing teams | No, paid plans | Yes |
“Free” here means the tool gives you its complete result without payment details or an email gate. Tools that show a teaser score and gate the findings behind a signup form are lead magnets, which is a fine business model but a different product.
Free trials that aren’t free tools
Two names you’ll meet while searching deserve honest classification. Otterly.ai starts at $29/month with a free trial and monitors four AI surfaces (ChatGPT, Google AI Overviews, Perplexity, and Microsoft Copilot), with Claude, Gemini, and Google AI Mode sold as add-ons; it earns real respect from us for publishing a null result on llms.txt that its own industry was hyping.
Peec AI offers prompt tracking for marketing teams on three self-serve plans (Starter, Pro and Advanced) plus a sales-led Enterprise tier. Its pricing page no longer shows prices up front, so you see yours at signup.
Both are paid monitoring products, not free checkers, and each has its own honest roundup: our Otterly alternatives and Peec AI alternatives comparisons.
Are AI visibility checkers different from regular visibility checkers?
Yes, they measure different systems, and the difference decides which one you need. A regular website visibility checker is a rank tracker: it reports where your pages sit in Google’s or Bing’s classic results for the keywords you track.
An AI visibility checker measures the newer layer, whether AI assistants like ChatGPT, Perplexity, and Gemini can read your site, and what they say when someone asks about your market.
The two overlap more than the tool vendors admit, because AI assistants retrieve answers through the same search indexes your rank tracker watches. If you rank nowhere, no AI checker will save you. But the failure modes differ: a site can rank fine on Google and still be invisible to AI because a firewall rule blocks GPTBot, or because its content only exists inside JavaScript that AI crawlers never execute. Those are exactly the failures an on-page AI scan catches and a rank tracker never will.
Is there an AI visibility checker app?
Yes, one runs inside ChatGPT: AIOScan’s app, which is ours, runs the same free scan in a chat and replies with your score, the top fixes and a report link. There is no dedicated mobile app worth installing as of October 2026, and you don’t need one, since every free checker in this roundup runs fine in a phone browser.
Be skeptical of app-store listings promising “AI SEO scores” in an app: the ones we’ve looked at wrap a web dashboard around thinner checks than the free web tools already give you.
Which should you run first?
One from each camp, because they answer different questions. Run the AIOScan scan to find out whether anything is blocking or blinding AI systems on your site, and fix what it finds using the linked guides. Run Ahrefs’ checker to see whether AI names you today, and HubSpot’s grader if you also want to know how it describes you.
If the brand-side tools say you’re invisible and our scan says your site is unreadable, you’ve found your causality. When you outgrow snapshots and want continuous tracking, those two comparisons cover the paid tier honestly.
See where your site stands. The free scan takes about fifteen seconds and shows every fix.
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