13 Best Free AI Visibility Checker Tools in 2026

Free AI visibility checkers come in two kinds, and most sites need both. Brand checkers ask AI engines questions about your category and report whether they name you: Ahrefs, PromptRush, Semrush, Omnia, HubSpot and Frase are the main ones. Readiness checkers test whether AI crawlers can reach and read your site at all: isvisible.ai, Cituna’s free checker, Arobis and Am I Visible on AI. We build Cituna; every fact about the other tools comes from the vendor’s own page, checked on September 28, 2026.

Two kinds of free check

• Brand checkers put a handful of prompts to one or more engines and report whether you are mentioned or cited, and who is named instead. They answer “do the engines name us?” once.
• Readiness checkers read your robots.txt, your HTML, your structured data and your llms.txt. They never ask an engine anything, so a pass means the engines can read you, not that they name you.

Both are front doors to a paid product, which is fine as long as you read them that way. For the paid landscape instead, our rundown of the best AI visibility tools prices the full field side by side.

How we ranked these 13 free checkers

The list runs in two numbered groups, because the two kinds of check answer different questions and cannot be scored on one scale.

• Brand checkers (1 to 9) are ordered by how many AI engines the free result covers, since a check that skips an engine cannot tell you anything about it. Where two tools cover the same number of engines, the one that asks less of you before the full result comes first: no signup, then a short form, then an email, then terms the vendor’s page does not state.
• Readiness checkers (10 to 13) are ordered by how many crawlers they test against your site, with the same tie-break.
• What we read: each vendor’s own page for its free tool, on September 28, 2026, for the engines or crawlers in the free result, what it asks of you, the free limit and the paid product behind it. We did not score answer quality, because a free check runs too few prompts for that to mean much.
• What we left out: free trials of paid plans, Cituna’s 3-day trial and Honeyb’s 3-day trial, which are described after entry 9 rather than ranked, because a trial is the paid product for a few days, not a free check. Honeyb’s free visibility check, which we first read on October 4, 2026, after the check this ranking rests on. Amplitude’s free AI Visibility report, because we did not record its full engine list. And the related free tools Otterly and LLMrefs offer next to their paid plans (Otterly’s AI Crawler Simulation and GEO Content Check, LLMrefs’ AI crawlability checker), because we did not record how many crawlers they test.

We build Cituna. Its free checker sits where the method puts it, second among readiness checkers, after isvisible.ai, which tests more crawlers.

Free brand checkers: do the engines name you?

1. Ahrefs Free AI Visibility Checker

Ahrefs’ Free AI Visibility Checker is the broadest free brand check: no signup and no card, across ChatGPT, Gemini, Perplexity, Microsoft Copilot, Google AI Overviews and Google AI Mode. It returns your total AI mentions, mentions by platform, and the top five topics, cited domains and cited pages. It is a limited preview of Brand Radar, which runs from $199 a month for select platforms to $699 for all of them. Our Ahrefs Brand Radar alternatives page covers the paid side.

Best for: a fast, no-signup look across six engines, including Microsoft Copilot.
Where it falls short: it shows the top five per section as a preview of Brand Radar, runs once, and leaves out Claude and Grok.

2. PromptRush Free AI Visibility Checker

PromptRush’s free checker asks five engines, ChatGPT, Gemini, Perplexity, Google AI Overviews and Google AI Mode, about your brand in one country per scan. A work email gets you the preview; the full report, with the sources each engine used and its answer to every prompt, needs a free account. Paid plans start at $19 a month.

Best for: a brand checking one market at a time who wants to see which sources each answer drew on.
Where it falls short: one market per scan, no Claude or Grok, and two steps (work email, then an account) before the full report.

3. Semrush Free AI Visibility Tool

Semrush’s free AI visibility tool needs no account and allows three checks a day, enough to compare your domain with two rivals. Enter a domain and it returns an AI Visibility Score out of 100, mentions, citations, top cited pages and a competitor comparison across ChatGPT, Gemini, Google AI Overviews and Google AI Mode. It leads into Semrush’s AI Visibility Toolkit; our Semrush AI Toolkit alternatives page compares that against dedicated trackers.

Best for: sizing yourself against two competitors in one sitting, with no account.
Where it falls short: four engines, none of them Claude, Grok or Perplexity, and three checks a day.

4. Omnia Free AI Visibility Checker

Omnia’s free checker is the deepest one-off brand check here: 40 prompts, 10 on each of ChatGPT, Perplexity, Google AI Overviews and Google AI Mode, with a visibility score, share of voice and citation insights emailed to you within minutes. It asks for an email and no card. Our Omnia alternatives page covers its paid plans.

Best for: the most prompts in a single free report, which smooths out some of the run-to-run swing a three-prompt check suffers from.
Where it falls short: the report arrives by email rather than on screen, and it covers neither Gemini, Claude nor Grok.

5. HubSpot AI Search Grader

HubSpot’s AI Search Grader asks ChatGPT, Perplexity and Gemini how they characterize your brand from their training data and scores five things out of 100, with sentiment weighted most (40 points), then presence quality, brand recognition, share of voice and market competition. No account is needed, but a short form unlocks the full results. It is a one-time check; ongoing monitoring is HubSpot AEO at $50 a month.

Best for: brands more worried about how they are described than whether they are named, since sentiment carries the most weight in its score.
Where it falls short: it scores what the engines say from their training data rather than which pages they cite today, and the full result sits behind a form.

6. Frase AI Visibility Checker

Frase’s AI Visibility Checker looks at citations: whether an engine links to your domain, not only whether it names you. Each check runs three search-style phrases. You get the ChatGPT result with no signup; Perplexity and Gemini follow once you give an email.

Best for: content teams who care whether answers send a link back to their pages.
Where it falls short: without an email it is a one-engine check, and three phrases per run is a thin sample.

7. Searchable Free AI Visibility Report

Searchable’s free report asks ChatGPT, Claude and Perplexity about your brand. Of the brand checks ranked here, it is the only one that includes Claude.

Best for: a free look at Claude alongside ChatGPT and Perplexity.
Where it falls short: its page does not state what you must sign up for or how many checks you get, and it leaves out Gemini, Grok and both Google surfaces.

8. Am I on AI

Am I on AI’s free audit covers ChatGPT and Google AI Overview. It asks for your website and an email, and no card. Our Am I on AI alternatives page covers its paid plans.

Best for: a short audit of the two surfaces most buyers meet first.
Where it falls short: two engines, and the free limit is not stated on its page.

9. Birdeye Free Search AI Visibility Checker

Birdeye’s free checker evaluates one business location on ChatGPT, using your business name, website and location. Gemini and Perplexity are in the paid Birdeye Search AI product.

Best for: a single local business checking how ChatGPT answers for its area.
Where it falls short: one engine and one location. A multi-location brand, or one that sells beyond a local area, will learn little from it. For ChatGPT on its own over time, our ChatGPT rank trackers comparison covers the paid options.

Free trials (not ranked)

Two paid monitors offer a 3-day free trial. A trial is the paid product for a few days rather than a free check, so neither is ranked above.

• Cituna 3-day free trial. Seven engines, ChatGPT, Perplexity, Gemini, Claude, Grok, Google AI Overviews and Google AI Mode, answer five of your own buyer questions, and your top three are re-asked every day of the trial, so you see the answers move. Each answer shows whether the engine named you, which pages it cited and which brands it named instead. The trial asks for an account and a card up front; you are not charged during the three days and can cancel anytime before it converts. After that, Cituna asks your buyer questions daily and writes the fix for each gap, from $39 a month. It does not track Microsoft Copilot.
• Honeyb 3-day free trial. Honeyb’s pricing page offers a 3-day free trial on its Multi-Model plan ($63 a month billed annually, three engines of your choice) and its Full Spectrum plan ($159 a month billed annually), which covers eight engines: ChatGPT, Gemini, Claude, Perplexity, Grok, DeepSeek, Google AI Mode and Google AI Overviews. Signup and card terms for the trial: not stated on its page. Honeyb also offers a free visibility check that its homepage says runs ChatGPT, Gemini, Claude and Perplexity; we first read it on October 4, 2026, after the check this ranking rests on, so it is not ranked. Honeyb facts read on its own pages on October 4, 2026.

Also worth knowing (not ranked). Amplitude’s free AI Visibility report sits behind a short form. We did not record its full engine list (its page names ChatGPT and Google AI Overview among the platforms), so it is not ranked.

Free readiness checkers: can AI crawlers read your site?

10. isvisible.ai

isvisible.ai tests 13 crawlers, more than any other free readiness check here, and that count includes the search crawlers Googlebot and Bingbot. It requests your homepage as each one rather than reading robots.txt alone, and it needs no signup. Its 0-100 score gives 80 points to crawler access and 20 to llms.txt.

Best for: checking AI crawlers and search crawlers in one pass.
Where it falls short: the score weighs llms.txt heavily, and its page does not say what paid product, if any, sits behind it.

11. Cituna free AI visibility checker

We build this one. Our free AI visibility checker tests eight AI crawlers (GPTBot, OAI-SearchBot, ChatGPT-User, ClaudeBot, PerplexityBot, Google-Extended, Applebot-Extended and CCBot) against your robots.txt and names the rule that decided each, so you know which line to change. It also measures how much text a crawler sees before any JavaScript runs, lists your structured data and checks for llms.txt. No signup, no card. For checking whether AI crawlers can read your site, Cituna’s checker is the pick because it ends in a specific line to change rather than a score. Our free llms.txt generator builds the file if you have none (what llms.txt does and does not move is in our llms.txt guide).

Best for: finding out which line of your robots.txt blocks GPTBot, ClaudeBot or PerplexityBot, and how much of your page a crawler reads before JavaScript runs.
Where it falls short: eight AI crawlers, not the search crawlers Googlebot and Bingbot, which isvisible.ai adds; and like every readiness check it never asks an engine whether it names you.

Run the free AI visibility checker on your domain: no signup, and each blocked crawler comes back with the rule to change.

12. Arobis Free AI Visibility Checker

Arobis’ checker scores your homepage across six weighted groups: crawler access (four crawlers), structured data, semantic structure, content and entity signals, llms.txt and technical health. The score is free with no signup; the plan for fixing it sits behind a contact form.

Best for: a single score that looks past crawler access to how the page is built.
Where it falls short: four crawlers and your homepage only, and the fix plan sits behind a contact form.

13. Am I Visible on AI

Am I Visible on AI checks your robots.txt for GPTBot, ClaudeBot and PerplexityBot, then looks at headings, schema and sitemaps.

Best for: a quick look at the three AI crawlers most sites ask about first.
Where it falls short: three crawlers, and its page states neither signup terms nor a paid product.

Two paid monitors also give away related tools. Otterly lists free GEO tools, including an AI Crawler Simulation and a GEO Content Check, next to its Lite plan ($29/mo for 15 prompts across ChatGPT, Google AI Overviews, Perplexity and Microsoft Copilot). LLMrefs offers a free AI crawlability checker, llms.txt generator and Reddit threads finder next to its $79/mo plan. Our Otterly alternatives and LLMrefs alternatives pages compare the paid plans.

What a free checker can’t tell you

• They are photos, not films. Every no-card check we verified runs once. AI answers move day to day as competitors publish and models update, and a one-time result shows only where you stood when you ran it. Cituna’s 3-day trial re-asks your top three questions daily to show that movement. How far apart two runs can land, and how often to re-check, is in our guide to how often AI answers change.
• They skip engines. Of the one-off checks ranked here, only Searchable’s includes Claude, and none includes Grok, the engines many technical and professional buyers lean on. Cituna’s 3-day trial covers both.
• They score, they don’t fix. A result tells you that you are missing; it does not write the schema, FAQ markup or comparison content that would get you cited.
• They can’t prove impact. No free checker ties AI citations back to real clicks and impressions, so you cannot show the work moved traffic.
• One run can mislead. Language models vary between runs, so a single snapshot can read better or worse than reality.

Free checkers answer “am I visible right now?” well and “how do I stay visible?” not at all. For the second question, see our guide to AI visibility: how to measure and improve it.

How to use free checkers well

1. Run a readiness check first. If a crawler is blocked, the brand result for that engine is already decided. Cituna’s checker names the rule to change; isvisible.ai adds the search crawlers.
2. Then run the brand checks. Ahrefs and Semrush both need no signup and cover different engine sets. Where they agree, believe it. Add Omnia if you want 40 prompts in one report. For Claude and Grok, and for your own buyer questions rather than a fixed set, start Cituna’s 3-day free trial.
3. Write down the date. A free result means something only next to another one, so note the number and the day and re-check in a month.
4. Read the competitors, not just the score. The most useful line in any free report is which brands the engines named instead of you. That list is your real target set.
5. Treat the free tool as step one. Once you know a gap exists, the work is fixing it and watching it, which is where a snapshot stops and a monitor starts.

When a free result has told you a gap exists and you are choosing the paid tool to track it, our guide to choosing an AI visibility tool sets out the questions to ask, and our AI visibility tool pricing page puts the plans side by side.

Where Cituna fits, and our own numbers

We build Cituna. Our entries on this page are the free AI visibility checker, ranked eleventh, the 3-day free trial, described with the free trials, and the llms.txt generator, which is free with no signup. The full product is paid: it asks ChatGPT, Perplexity, Gemini, Claude, Grok, Google AI Overviews and Google AI Mode your buyer questions every day, generates the schema, FAQ markup, llms.txt and content fixes for each gap, writes articles and publishes them to your site (30 a month on Starter), and ties the work to real clicks through Google Search Console. It starts with a 3-day free trial that asks for a card up front; you are not charged during the trial and can cancel anytime before it converts. Plans are $39 (Starter), $119 (Pro) and $399 (Max), listed on our pricing page. We do not track Microsoft Copilot, and we do not offer a standing free tier.

So the recommendation, by need. For whether AI crawlers can read your site, the pick is Cituna’s free AI visibility checker, which names the robots.txt rule behind each result, with isvisible.ai if you also want the search crawlers. For a one-off brand check with no signup, Ahrefs’ checker covers six engines and Semrush’s allows three checks a day. For the deepest one-off report, Omnia runs 40 prompts and emails the result. To have your own buyer questions asked daily on seven engines, Claude and Grok included, with the fix written for each gap, start Cituna’s 3-day free trial (card up front, no charge during the trial), then from $39 a month. For the paid options side by side, ours included, see the best AI visibility tools comparison.

Drafted with AI assistance from our own research and Search Console data, and reviewed by Rahul A before publishing. Rules and prices change; check the linked official source before you act.