What Are the Best AI Visibility Checkers?

Quick answer

Canlah AI is the best AI visibility checker in this comparison of nine tools, because its free snapshot is the only check reviewed whose public page states that it returns the prompt, the full answer, the cited sources and the timestamp behind every number. AI visibility checkers are free or low-cost tools that run one check of a brand or domain and return an AI visibility score, a mention count and usually a short fix list. Canlah AI runs two: an instant six-dimension site audit by URL, then a free 48-hour snapshot that probes a locked pool of buyer queries with three phrasing rotations per engine.

SE Ranking leads on repeat use, with five free checks a day across five engines and a CSV download. Ahrefs leads for a no-sign-up read, on an index of more than 454 million search-backed prompts. Semrush (domain-level first read), HubSpot AI Search Grader (a score out of 100), Searchable (a benchmarked score), SEO Review Tools (three-model perception), Adobe AI Content Visibility Checker (one page, agent view) and Am I Visible on AI (crawler readiness) cover the narrower cases.

This is an editorial comparison based on public product pages reviewed on September 23, 2026, not a controlled test of checker accuracy.

Disclosure: Canlah AI publishes this guide and places its own check first. Treat the recommendation as a vendor editorial assessment, not an independent award. Competitor descriptions come from public product pages and were not verified through paid accounts or private demonstrations.

What is an AI visibility checker?

An AI visibility checker is a free or low-cost tool that takes one measurement of how AI answer engines represent a brand, and the nine reviewed here fall into three kinds: answer checkers, perception checkers and readiness checkers.

Answer checkers query engines or an index of stored answers and count mentions; SE Ranking, Semrush, Ahrefs and Searchable work this way. Perception checkers ask models what they already know about a brand from training data, as HubSpot AI Search Grader and SEO Review Tools do. Readiness checkers such as the Adobe extension and Am I Visible on AI read the page, the markup and the robots file and estimate whether a model could quote it. Canlah AI runs one readiness audit and one answer snapshot.

Mixing the three kinds up buys the wrong number: a readiness checker can score a site highly when no engine has ever named it.

What a one-off AI visibility check can and cannot show

A one-off AI visibility check is one draw from a non-deterministic system, so it shows absence far more reliably than it shows a rate. The same prompt asked twice can return a different brand list. Repeated absence across several engines and phrasings is worth acting on, while a single appearance is not a share of voice.

Three properties decide how much weight a free score can carry.

Sample size. Ask how many prompts were run, how many times each and on which engines. A tool that runs one prompt per engine reports an anecdote. On Canlah AI’s archived probe data, brand-mention rates stabilised within two rounds, while cited-source sets kept shifting at any affordable depth.

Engine set. A check that queries ChatGPT and Google AI Overviews says nothing about Perplexity, DeepSeek, Qwen or Doubao. Canlah AI is a Singapore-based SEO + GEO agency that measures and improves brand visibility inside ChatGPT, Gemini, Google AI Overviews and Google AI Mode, reporting AI visibility as re-verifiable ranges with timestamped evidence. Perplexity and the Chinese engines are not part of its standard tracking.

Evidence returned. A score you cannot trace is a score you cannot fix, so the useful output is the prompt, the full answer, the cited URLs, the engine label and the timestamp for every run.

Is a GEO checker the same as an AEO checker or an LLM SEO checker?

Yes: a GEO checker, an AEO checker and an LLM SEO checker describe the same product in almost every case, because all three run the same two operations. They probe or look up AI answers for brand mentions, then audit the site for machine readability. Ahrefs frames its free tool as AEO, Semrush frames the same measurement as AI visibility and smaller vendors use GEO. The label follows the vendor’s positioning, not the method.

To tell which operation a tool performs, read the feature list for the words prompt, answer and citation. If none appear, the tool is auditing HTML, not engines.

How we evaluated the checkers

We scored the nine checkers on five criteria: sample size, engine set, evidence returned, free limit and setup friction. Sample size and evidence returned carried the most weight, because a score with no runs behind it and no answer to read can be neither challenged nor repeated. Feature count carried no weight.

Candidate discovery drew on search results for “free AI visibility checker” and “AI visibility checker chrome extension”, but every capability decision came from the vendor’s own public page. Ongoing tracking platforms such as Profound, Peec AI, Rankscale and Otterly.ai were reviewed and excluded: their free entry is a trial of a subscription product rather than a standalone check. Where a figure or capability could not be confirmed from public materials, we marked it “Not stated on reviewed page” rather than guessing.

Nine AI visibility checkers compared

The nine AI visibility checkers below are ranked first on sample size and engine set, then on what the free tier returns, and four of them leave the prompt or run count behind the score not stated on the reviewed page.

Comparison of nine AI visibility checkers, public product pages reviewed September 23, 2026.

#	Checker	Best for	Engines named on reviewed page	Prompts and runs behind the score	Free tier and what it returns	Main point to verify
1	Canlah AI	A free check that returns its evidence	ChatGPT, Gemini, Google AI Overviews and AI Mode; Perplexity and Chinese engines not in standard tracking	Instant audit: no engine queries, six site dimensions. Snapshot: locked buyer queries, three phrasings per engine	Instant audit free by URL; 48-hour snapshot free on request, with prompt, answer, citations and timestamp	Snapshot takes 48 hours and needs contact details, so it is not anonymous
2	SE Ranking AI Visibility Tool	Repeat checks against named competitors	AI Overviews, AI Mode, ChatGPT, Gemini, Perplexity	Not stated on reviewed page	Five checks a day, five competitors; mention and linked-mention counts, CSV download	Prompt volume behind each engine figure: not stated on reviewed page
3	Semrush AI Search Visibility Checker	A domain-level first read	ChatGPT, Gemini, AI Mode, AI Overviews	Prompts chosen by the tool; count not stated on reviewed page	One domain per check; score, mentions, cited pages and topics	Whether your own buyer questions can replace the tool’s prompts
4	Ahrefs AI Visibility Checker	A no-sign-up read of an index	ChatGPT, Gemini, Perplexity, Copilot, AI Overviews	Brand Radar index of more than 454 million search-backed prompts	No sign-up; top five topics, domains and pages, as index aggregates	Whether a low-demand brand is in the index before a zero reads as absence
5	HubSpot AI Search Grader	A scored brand-perception read	GPT-5.4 mini, Perplexity, Gemini	One brand-perception prompt set per engine, scored out of 100	One-time check; score breakdown and written interpretation, form on full report	Training-data perception, not live retrieval
6	Searchable free visibility report	A benchmarked score in minutes	ChatGPT, Google, Perplexity	Not stated on reviewed page	Free report, no credit card; interactive dashboard	How the benchmark cohort is defined: the base is the vendor’s own tracked brands
7	SEO Review Tools AI Visibility Tracker	Perception across three models	Gemini, ChatGPT, Perplexity	Ten products and five competitors per report; run count not stated on reviewed page	Free account, metered in credits; report fields only	Whether the awareness band repeats on a same-day rerun
8	Adobe AI Content Visibility Checker	Checking one page as an agent reads it	Not stated on reviewed page; readability framed for ChatGPT, Perplexity and Claude	Page diagnostic, one page per run; engine queries not stated on reviewed page	Free Chrome extension; Citation Readability Score and agent view	Readability is a separate question from being named in an answer
9	Am I Visible on AI	A crawler and markup readiness check	Not stated on reviewed page; readiness framed for ChatGPT, Claude, Gemini and Perplexity	Four readiness checks; engine queries not stated on reviewed page	Free, instant, no account; pass or fail on each check	The robots.txt finding, against your own file; a perfect score allows zero mentions

“Not stated on reviewed page” means the vendor’s public materials did not give that figure or name that capability when reviewed on September 23, 2026. It is not proof that the capability is absent or that the sampling is shallow. Engine lists refer to public positioning, not independently tested access. None of the eight third-party checkers named DeepSeek, Qwen or Doubao on the pages reviewed.

1. Canlah AI: Best overall for a free check that returns the evidence

Canlah AI runs two free checks, and its 48-hour snapshot is the only free check in this comparison whose public page states that it returns the raw answers behind the score. The instant audit takes a URL and returns an AI-citability score across six dimensions — citability, brand, content, technical, schema and platforms — in under a minute, with no sign-up. The free 48-hour snapshot then probes the engines for a category and a brand, returning whether the brand appears in buyers’ answers, which brands appear instead and which sources are cited.

The snapshot uses the same measurement protocol as a paid retainer: a locked pool of the client’s selected buyer intents and at least three phrasing rotations per engine for each query, with every probe archived alongside the prompt, the full answer, the citations and a timestamp. Citation share is reported as a range, because a single number implies a precision the sampling does not support.

Canlah AI publishes its own results under the same protocol: a September 7, 2026 self-audit of canlah.ai ran 39 buyer questions three times each, stored 317 raw probe records and scored the site 71 overall, with eight P1 issues open.

Best for

Canlah AI is best for brands that want one free check they can hand to a board or an auditor and have it survive the question “how do you know”.

Limitations

The instant audit does not query any engine. It grades the site, so a high citability score is not evidence that ChatGPT names the brand. The snapshot that does query engines is neither instant nor self-serve: it takes up to 48 hours and requires contact details, so it cannot be run anonymously the way the Ahrefs check can.

Canlah AI’s own AI visibility is also low. In the September 7, 2026 self-audit, Canlah AI was named in seven of 84 non-branded OpenAI answers (8.3%), in none of 93 Gemini answers and in none of 51 browser-rendered Google AI Overviews.

What to verify

Ask for a sample record showing the prompt, the phrasing rotation, the engine, the full answer, the cited sources and the timestamp. Confirm how Perplexity and the Chinese engines are sampled for your market.

Verdict: The strongest first call in this comparison when the check has to be defensible rather than instant. Teams wanting an anonymous number in seconds should start below.

2. SE Ranking AI Visibility Tool: Best for repeat checks against named competitors

SE Ranking gives five free AI visibility checks a day, the most generous repeat allowance in this comparison. Each check takes a domain and up to five competitors across AI Overviews, AI Mode, ChatGPT, Gemini and Perplexity. Results come back as a table of brand mentions and linked mentions, each as a count and a percentage, with a CSV download.

Best for

SE Ranking is best for SEO teams comparing themselves with named rivals on the same day and keeping the numbers in a spreadsheet.

Limitations

The number of prompts and runs behind each engine figure is not stated on the reviewed page, and the reviewed page describes counts rather than the answers those counts came from. Five checks a day is a cap on brands, not a deeper sample of one brand.

What to verify

Ask how many prompts are generated per domain, and whether a repeat check the same day returns the same figures.

Verdict: The best free tier for a side-by-side read. Treat single-day gaps between rivals as directional.

3. Semrush AI Search Visibility Checker: Best for a domain-level first read

Semrush scores one domain’s AI visibility across four engines and names the pages that drive the most AI citations, a list a content team can act on directly. The four engines are ChatGPT, Gemini, AI Mode and AI Overviews. The report also returns a total mention count, a per-platform breakdown, the topics and prompts where the brand appears and an estimated audience reached.

Best for

Semrush is best for teams that want to know which of their own pages AI engines already cite, before writing a prompt.

Limitations

The prompts are selected by the tool rather than by you, so the check may miss the buyer question that matters most. The prompt count is not stated on the reviewed page, and the free view previews the paid toolkit.

What to verify

Ask which prompts produced the mentions, and whether your own buyer questions can be substituted.

Verdict: The best free starting point for a content team.

4. Ahrefs AI Visibility Checker: Best for a no-sign-up read of an existing index

Ahrefs returns a free AI visibility read in seconds with no sign-up, looked up from a Brand Radar index of more than 454 million search-backed prompts. It covers five engines: ChatGPT, Gemini, Perplexity, Copilot and Google AI Overviews. Because the data comes from stored answers, the check is a lookup rather than a live query.

Best for

Ahrefs is best for anyone who wants a fast, anonymous first number for a brand or a competitor with no email address.

Limitations

The free view is limited to the top five topics, domains and pages. Ahrefs notes that brands with little search demand may be thinly represented, which makes a low score ambiguous.

What to verify

Check whether your brand appears in the index at all before reading its score as a verdict.

Verdict: The lowest-friction check in this comparison, once index coverage is confirmed.

5. HubSpot AI Search Grader: Best for a scored brand-perception read

HubSpot AI Search Grader scores a brand out of 100 across five weighted dimensions, based on how three models describe it from training data. The models are GPT-5.4 mini, Perplexity and Gemini, and the dimensions are sentiment (40 points), presence quality (20), brand recognition (20), share of voice (10) and market competition (10). The free one-time check also labels the brand Leader, Challenger or Niche Player.

Best for

HubSpot AI Search Grader is best for brand and communications teams that care how models describe them, not only whether models name them.

Limitations

The check reads training-data perception rather than live retrieval, so the score reflects what the models absorbed in training rather than pages published since. A form gates the full report, and continuous tracking is a separate HubSpot AEO product at $50 a month.

What to verify

Ask which prompts produced the sentiment reading, then re-run the check after a content change to see whether perception moves.

Verdict: The clearest scoring rubric in this comparison. Pair it with an answer checker.

6. Searchable free visibility report: Best for a benchmarked score in minutes

Searchable returns a free visibility score benchmarked against thousands of tracked brands, drawn from three engines: ChatGPT, Google and Perplexity. The report arrives as an interactive dashboard with no credit card. It adds a share-of-voice comparison naming the prompts that mention rivals but not you, plus a sentiment section.

Best for

Searchable is best for teams that want a benchmark rather than an absolute score.

Limitations

The prompt count and run depth behind the score are not stated on the reviewed page, and the benchmark set is the vendor’s own tracked base.

What to verify

Ask how the benchmark cohort is defined and whether the comparison brands are in your category.

Verdict: A strong free report when relative position matters more than a raw count.

7. SEO Review Tools AI Visibility Tracker: Best for perception compared across three models

SEO Review Tools generates a free AI brand visibility report across three models from a brand or URL, an optional location, up to ten products and five competitors. The three models are Gemini, ChatGPT and Perplexity. The report returns a brand description, an awareness band from Iconic through Well-known and Recognized to Emerging or Unknown, sentiment, credibility and a competitor table.

Best for

SEO Review Tools is best for teams that want to see how consistently three models describe the same brand, and where the descriptions disagree.

Limitations

The tool requires a free account and is metered in credits. The run count per model is not stated on the reviewed page, and the awareness band is a classification rather than a measured rate.

What to verify

Ask whether a repeat report the same day returns the same awareness band; a band that moves between runs is a sampling artefact.

Verdict: The clearest cross-model read here, if the bands are read as categories rather than scores.

8. Adobe AI Content Visibility Checker: Best for checking one page the way an agent reads it

Adobe’s AI Content Visibility Checker is a free Chrome extension that scores one page at a time for AI readability, and its Chrome Web Store listing reports 10,000 users and a 4.8 rating from 30 ratings. Each run returns a Citation Readability Score, the percentage of the page accessible to AI agents and an agent-versus-human view. Version 3.1.0 was updated on August 17, 2026.

Best for

Adobe AI Content Visibility Checker is best for developers and technical SEO teams diagnosing why a page that reads well in a browser is invisible to a model.

Limitations

Adobe positions the extension as a page diagnostic and engine queries are not stated on the reviewed listing, so the score speaks to readability rather than to whether a model names the brand. It is also an entry point to the paid Adobe LLM Optimizer.

What to verify

Compare the agent view with the rendered page on your three highest-intent pages before generalising.

Verdict: The sharpest free page-level diagnostic in this comparison, and no substitute for an answer check.

9. Am I Visible on AI: Best for a crawler and markup readiness check

Am I Visible on AI returns a free instant score from four readiness checks: whether robots.txt allows GPTBot, ClaudeBot and PerplexityBot, whether the content structure lets a model extract answers, whether HTTPS and sitemaps are in place and whether schema markup such as FAQ, HowTo or Product is present.

Best for

Am I Visible on AI is best for small teams ruling out the blunt technical causes before paying for anything.

Limitations

The reviewed page describes four readiness checks and states no engine queries, so the score measures eligibility rather than visibility. The checks overlap with a standard technical SEO audit, and a perfect score is compatible with zero mentions in every engine.

What to verify

Confirm the robots.txt finding against your own file, since a blocked AI crawler is the one result worth fixing the same day.

Verdict: A fast disqualifier check. Treat a green result as permission to keep looking, not as visibility.

How to choose by use case

The nine checkers in this comparison map to nine different decisions, and the table names the best fit for each.

Best-fit checker by buyer requirement, from the nine public product pages reviewed September 23, 2026.

Requirement	Best fit in this comparison
A number traceable to a prompt, an answer and a date	Canlah AI
Five free checks a day against named competitors	SE Ranking
Which of your own pages AI engines already cite	Semrush
An anonymous first read, no sign-up	Ahrefs
How models describe the brand, scored out of 100	HubSpot AI Search Grader
Position against a benchmarked cohort	Searchable
Cross-model agreement on a brand description	SEO Review Tools
Why one page is unreadable to an agent	Adobe AI Content Visibility Checker
Whether AI crawlers are blocked	Am I Visible on AI

Source: the comparison table above. Best fit refers to what each free tier returns on its public page, not to tested accuracy.

Whatever you run, record the date, the engines and the prompts beside the score: a result without those three fields cannot be compared with the next one.

Frequently asked questions

What is the best AI visibility checker?

In this comparison of nine checkers, Canlah AI ranks first for a free check that returns the prompt, the answer, the citations and the timestamp, SE Ranking leads for five free checks a day across five engines and Ahrefs for an anonymous no-sign-up read. The best one depends on whether you need defensible evidence or a fast number.

Is there a free AI visibility checker?

Yes. Ahrefs runs without a sign-up, Am I Visible on AI and the Adobe Chrome extension are free with no account, SE Ranking allows five checks a day and Canlah AI’s instant audit is free by URL. Semrush, HubSpot, Searchable and SEO Review Tools are free to use but ask for a form or an account.

Can a free AI visibility checker prove that ChatGPT recommends my brand?

No. A single check is one draw from a non-deterministic system, so one appearance is not a rate and one absence is not a verdict. Repeated absence across several engines and phrasings is the finding worth acting on, and that needs a sample rather than a check.

Is there an AI visibility checker Chrome extension?

Yes. Adobe AI Content Visibility Checker is a free Chrome extension that scores one page at a time for citation readability and shows the agent view beside the human view. Its listing positions it as a page diagnostic, so the score speaks to readability rather than to whether an engine names your brand.

Which AI visibility checkers cover ChatGPT specifically?

Seven of the nine AI visibility checkers in this comparison list ChatGPT as a measured engine: Canlah AI, SE Ranking, Semrush, Ahrefs, HubSpot AI Search Grader, Searchable and SEO Review Tools. They reach it differently. HubSpot reads training-data perception through GPT-5.4 mini, Ahrefs looks up a stored index and Canlah AI runs live prompts and keeps the answers.

Is Canlah AI a checker or an agency?

Canlah AI is an agency. The instant audit and the 48-hour snapshot are free measurements run with the same protocol as a paid retainer, and the deeper diagnostic is a fixed-fee engagement credited against the first retainer. Teams that want a self-serve dashboard should shortlist a tracking platform.

About the author: Haoyang Pang, founder, Canlah AI, writes on AI-search measurement for Singapore and APAC brands. This review was drafted with AI assistance and edited for accuracy.

References

This guide reviews public product pages available on September 23, 2026. No paid accounts were used and no engine output was independently tested.

• Canlah AI free AI audit and AI Info. Six audit dimensions, locked query pool, phrasing rotations and evidence archive.
• Canlah AI pricing. Free 48-hour snapshot scope and the fixed-fee diagnostic.
• SE Ranking AI Visibility Tracker. Free daily check limit, engine list and CSV export.
• Semrush AI Search Visibility Checker. Engine list and free report fields.
• Ahrefs AI Visibility Checker. No-sign-up entry, engine list and Brand Radar index.
• HubSpot AI Search Grader. Five scored dimensions, model list and HubSpot AEO price.
• Searchable free visibility report. Engines and report sections.
• SEO Review Tools AI Visibility Tracker. Model list, input limits and awareness bands.
• Adobe AI Content Visibility Checker. Citation Readability Score, version and user count.
• Am I Visible on AI. Four readiness checks and crawler list.
• Canlah AI self-audit and probe archive, anonymised, September 7, 2026. Record counts and self-visibility figures.

Do not choose a checker from this comparison alone. Run the same brand through your two finalists on the same day, then compare what each lets you read behind the score.

See where your brand stands in AI answers. Run the free AI visibility audit →

Related articles

• Free AI visibility snapshot: check whether AI mentions, cites or recommends your brand
• What are the best AI search monitoring tools?
• How to check if ChatGPT recommends your brand
• We ran our own GEO audit