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. Every price and feature claim below was re-verified on August 25, 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 Be suspicious of any score whose methodology is unpublished, because unverifiable numbers are this category’s chronic disease.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.
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.
Which checkers are completely free with no signup?
Two: AIOScan and HubSpot’s AEO Grader, and since they answer different questions you should run both. Everything else in this category is either a paid platform with a free side tool 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 |
| HubSpot AEO Grader | How AI models currently describe your brand | Yes, one-time snapshot | No |
| llmrefs crawlability checker | AI crawler access, narrower scope | Free side tool of a $79/month platform | No |
| Otterly.ai | Brand mentions across 4 AI surfaces | Free trial, then from $29/month | Yes |
| Peec AI | Prompt tracking for marketing teams | Trial, sales-gated pricing | 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 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.
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?
No, there is no dedicated mobile app worth installing as of August 2026, and you don’t need one. Every serious checker in this category is a web tool, and all of the free ones in this roundup run 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?
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