The best free AI visibility checkers in 2026
Free AI visibility checkers split into two camps that get confused constantly: tools that measure what AI systems say about your brand, and tools that measure whether AI systems can read your site at all. You want both answers, no single free tool gives both, and this roundup tells you which tool answers which question. 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.
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 Be suspicious of any score whose methodology is unpublished, because unverifiable numbers are this category’s chronic disease.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.
HubSpot AEO Grader: best free brand-perception snapshot
HubSpot’s AEO Grader asks for your company name, location, and industry, then reports how ChatGPT, Perplexity, and Gemini talk about your brand, scoring sentiment, presence, recognition, share of voice, and competitive position out of 100. It’s genuinely free with no account, runs in about two minutes, and the brand-level view is something an on-page scanner like ours doesn’t attempt.
Its limits are the flip side of its design. It measures brand perception, not your website, so it can’t tell you why you’re invisible or what to change on your pages. It’s a one-time snapshot, with ongoing tracking pushed to HubSpot’s paid AEO product at $50/month. And its scoring dimensions, like most in this category, aren’t backed by published citation research. Use it to know where you stand; don’t expect a work list.
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 useful free extra
llmrefs is a paid keyword-tracking platform for AI search at $79/month, but it ships a free AI crawlability checker as a side tool, and it’s a reasonable second opinion on the access question. The main product’s focus on statistically aggregated keyword rankings rather than one-off prompt screenshots is a methodologically honest angle in a category that needs more of that.
The free tool’s scope is narrower than a full on-page scan, and the platform’s real value sits behind the subscription. Worth a look when you’re ready to track rankings across AI engines by keyword.
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 7-day no-card trial and monitors six AI surfaces; 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 with a trial and sales-gated pricing.
Both are monitoring products with trials, not free checkers, and both are covered in our Otterly alternatives comparison.
Which should you run first?
Both free ones, in either order, 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 HubSpot’s grader to baseline how models currently describe your brand.
If the grader says you’re invisible and our scan says your site is unreadable, you’ve found your causality. When you outgrow snapshots and want continuous tracking, the monitoring-tool comparisons cover the paid tier honestly.
See where your site stands. The free scan takes about fifteen seconds and shows every fix.
Run a free AI visibility scan