What Are the Best GEO Audit Tools for Website Readiness?
GEO audit tools graded on what they check on the site itself. Nine crawlers, graders and readiness checkers ranked, led by Canlah AI on evidence returned.
Quick answer
Canlah AI ranks first among the best GEO audit tools in this comparison, because its free instant audit scores a site on six dimensions by URL in under a minute with no sign-up, and its paid diagnostic extends the same inspection to nine dimensions and 24 modules with an evidence record behind every finding. A GEO audit tool crawls a website and scores whether an AI engine could reach, parse and quote it.
Screaming Frog SEO Spider leads on crawl control, free to 500 URLs and £199 per year after that. Sitebulb leads on written explanations, with over 300 Hints and up to 500,000 URLs per audit on the Pro plan. The other six cover narrower cases: Semrush Site Audit (100 free pages), Ahrefs Site Audit with Bot Analytics (5,000 free crawl credits a month), Scrunch AI Site Diagnostics, Geoptie (six GEO dimensions), AEO Grader (US$10 for four engines) and Adobe AI Content Visibility Checker (one page).
This is an editorial comparison of nine tools based on public product pages reviewed on September 23, 2026, not a controlled test.
Disclosure: Canlah AI publishes this guide and places its own platform 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 a GEO audit tool?
A GEO audit tool is software that crawls a website and scores, usually from 0 to 100, how readable it is to a generative engine, without asking any engine what it says about the brand. It answers a supply-side question: if ChatGPT, Perplexity or Google AI Mode reached these pages, could they fetch them, render them, find a clean answer and attribute it to a recognised entity.
Site readiness and answer visibility produce different numbers on the same site, and that gap is why this category exists. In its own September 7, 2026 self-audit, Canlah AI scored 85 out of 100 on technical SEO health and 4 out of 100 on AI citation in the same run. The site was almost perfectly readable and almost entirely unquoted.
Four inspections decide the score. Crawler access covers whether robots.txt admits OAI-SearchBot, ChatGPT-User, Claude-SearchBot, PerplexityBot and Google-Extended, and whether the server returns them the same HTML. Rendering covers whether the answer survives without JavaScript. Structure covers headings, answer-shaped paragraphs and tables. Markup covers JSON-LD types, a Wikidata record and consistent naming.
Is a GEO audit the same as an AEO grader or an AI SEO audit?
Yes, in most cases a GEO audit, an AEO grader and an AI SEO audit are one product sold under three labels, each returning a 0 to 100 score built from site-side signals. What separates them is whether any engine was queried before the score was produced. A tool whose method never names a prompt, an answer or a citation is grading your HTML, which is useful work and a different measurement from visibility.
How we evaluated the nine tools
We scored each of the nine tools on five criteria: depth of site-side checks, AI-specific checks beyond classic technical SEO, evidence returned per finding, free tier and crawl ceiling. Depth and evidence carried the most weight, because a finding a developer cannot reproduce does not get fixed.
Candidates came from search results for “GEO audit tool”, “AEO grader” and “GEO score checker”; every capability decision was made from the vendor’s own page. Pure answer-monitoring platforms such as Profound, Peec AI and Otterly.ai were reviewed and excluded, because they report what engines say rather than inspect the site. Where a capability could not be confirmed from public materials, we marked it “Not found on reviewed page” rather than guessing.
Nine GEO audit tools compared
Three of the nine GEO audit tools compared, Canlah AI, Scrunch AI and AEO Grader, query AI answers inside the same product; for the other six, answer querying was not found on the reviewed page.
Comparison of nine GEO audit tools, public product pages reviewed September 23, 2026.
| # | Tool | Best for | Site-side checks named on the reviewed page | Queries AI answers in the same product | Free tier and price | Main point to verify |
|---|---|---|---|---|---|---|
| 1 | Canlah AI | A site score traceable to a dated evidence record | Free audit: six dimensions. Paid diagnostic: nine dimensions and 24 modules, including per-bot AI crawler access, JSON-LD types, Wikidata state, sitemap freshness | Yes in the paid diagnostic and the free AI visibility report; no in the instant audit | Instant audit free by URL in under a minute, no sign-up. DeepAudit $99 for One read or $189 for Month read, creditable toward the agency service | Instant audit queries no engine; confirm rendering and page ceiling |
| 2 | Screaming Frog SEO Spider | Crawl control and extracting anything from the HTML | Over 300 SEO issues, robots and meta directives, canonicals, JavaScript rendering, XML sitemaps, custom extraction | Not found on reviewed page. Custom prompts run against crawl data | Free to 500 URLs. £199 per year. Version 24.3 at review | AI checks are operator-built; confirm rendering is on |
| 3 | Sitebulb | Prioritised findings an agency can hand to a client | Over 300 Hints, each with a written explanation, plus JavaScript crawling, audit comparison, crawl maps | Not found on reviewed page | Free trial. Lite 10,000 URLs per audit, Pro 500,000 | Which Hints cover AI crawlers and llms.txt |
| 4 | Semrush Site Audit | Finding pages that block AI bots inside an existing SEO stack | Site Health score, issues ranked by severity, thematic reports and a list of pages blocking bots from AI systems including ChatGPT | Not found on reviewed page. Answer data sits in a separate toolkit | Free plan 100 pages per audit, paid toolkits 20,000 | Which crawlers the bot-block list covers |
| 5 | Ahrefs Site Audit with Bot Analytics | Seeing which AI bots actually reached the site | Technical crawl plus Bot Analytics, which reports the good and bad bots crawling the site | Not found on reviewed page. Answer data sits in Brand Radar | Free in Ahrefs Webmaster Tools, 5,000 crawl credits a month | Which AI user agents Bot Analytics names |
| 6 | Scrunch AI Site Diagnostics | Turning AI search findings into a page-by-page plan | Page-level recommendations, agent traffic analysis, agent content delivery | Yes. Monitoring sits in the same platform | Free trial. Price not found on reviewed page | Which recommendations come from the crawl |
| 7 | Geoptie free GEO audit | A no-sign-up GEO score in under a minute | Six dimensions: citation readiness, answer alignment, knowledge graph, content authority, technical optimisation, competitive positioning | Not found on reviewed page. Separate free tools query answers | Free, no sign-up | Crawl depth; re-run the same day for stability |
| 8 | AEO Grader | A free score that ships ready-to-paste JSON-LD | Four pillars: Authority, Clarity, Technical and Sentiment, plus question mapping and fixes as code | Partly. Free estimate asks Gemini with Google Search grounding; paid report asks four engines | Free estimate in about 60 seconds. US$10 per report | Free score uses one engine; validate the JSON-LD |
| 9 | Adobe AI Content Visibility Checker | Reading one page the way an agent reads it | Citation Readability Score and the share of one page reachable by AI agents | Not found on reviewed page | Free Chrome extension | One page per run; test your highest-intent pages |
Source: vendor product pages reviewed September 23, 2026. “Not found on reviewed page” means the vendor’s public materials did not name that capability or figure when reviewed on September 23, 2026. It is not proof that the capability or price is absent. Check lists refer to public positioning, not independently tested depth. DeepSeek, Qwen or Doubao crawler access was not found on the reviewed page of any of the eight third-party tools.
1. Canlah AI: Best overall for a site score you can trace to an evidence record
Canlah AI returns a scored six-dimension site audit from a URL in under a minute and keeps the raw evidence behind every finding. The instant audit grades citability, brand, content, technical, schema and platforms with no sign-up. The paid diagnostic runs the same inspection at nine dimensions and 24 modules, and each issue carries an identifier, a confidence figure, the evidence string behind it and the action that closes it.
AI crawler access is read per bot, so OAI-SearchBot, ChatGPT-User, Claude-User and Claude-SearchBot are reported separately instead of as one robots.txt verdict. Structured data is read as declared types against expected types, entity readiness against Wikidata statements and sitemap freshness as the share of URLs updated inside 90 days.
Canlah AI publishes its own audit under the same protocol. The September 7, 2026 self-audit of canlah.ai scored 71 overall, with zero P0, eight P1 and 14 P2 issues open. It found three JSON-LD blocks declaring FAQPage, ProfessionalService and WebSite with Organization and Article missing, scored schema at 60 out of 100 and recorded 42.5% of sitemap URLs updated inside 90 days against a 50% threshold. 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.
Best for
Teams that need a readiness score a developer can act on and an auditor can re-run, such as which AI crawlers can fetch the site and which expected schema types are missing.
Limitations
The instant audit queries no engine, so a high citability score is not evidence that any model names the brand. Canlah AI’s own run shows the point: technical SEO scored 85 while AI citation scored 4.
Crawl scale is the second limit. That run reached 80 of 174 sitemap URLs and fell back to basic fetching with no JavaScript rendering, so its 17 orphan-page finding was marked pending a re-crawl and excluded from scoring. Canlah AI does not compete with a desktop crawler on a 500,000-URL site, and the nine-dimension version is delivered as a service.
What to verify
Ask for a sample issue record showing the identifier, the confidence figure, the evidence string and the action. Confirm whether your site will be crawled with JavaScript rendering, and at what page ceiling.
Verdict: The strongest first call in this comparison when the audit must survive a technical review. Pair it with a desktop crawler on very large sites.
2. Screaming Frog SEO Spider: Best for crawl control on a large site
Screaming Frog SEO Spider audits a site for over 300 SEO issues and gives more control over the crawl than any other tool in this comparison. It is free to 500 URLs and costs £199 per year for the licence that removes the limit. Version 24.0, released on May 19, 2026, added an MCP server and auto-compare between scheduled crawls.
Best for
Technical SEO teams that write their own checks and want the raw crawl rather than a score.
Limitations
A GEO score or AI readiness dimension was not found on the reviewed page. AI-specific checks are something you build, through custom extraction or custom prompts to OpenAI, Gemini, Anthropic or Ollama run against crawl data. That assumes an operator who knows what to ask for.
What to verify
Confirm JavaScript rendering is enabled before reading any structure finding, since the default crawl mode changes what the tool sees.
Verdict: The reference crawler for this category, and a toolkit rather than a report.
3. Sitebulb: Best for findings a client can read without a translator
Sitebulb attaches a written explanation to each of its over 300 prioritised Hints, the clearest path in this comparison from a crawl to a document a client will accept. It ships as desktop software and as a cloud product, with JavaScript crawling at no extra cost, audit comparison, crawl maps and customised PDF reports. The Lite plan crawls 10,000 URLs per audit and the Pro plan 500,000, and an MCP integration brings crawl data into Claude.
Best for
Agencies producing audit deliverables for clients who need the reasoning, not the list alone.
Limitations
Like Screaming Frog, it is a technical SEO crawler first. Its Hints are organised around search engines rather than answer engines, and a GEO score was not found on the reviewed page.
What to verify
Check which Hints cover AI crawler directives and llms.txt on your plan before assuming coverage.
Verdict: The best explanation layer in this comparison. Treat GEO-specific checks as something you configure.
4. Semrush Site Audit: Best for AI bot blocks inside an existing SEO stack
Semrush Site Audit crawls 100 pages per audit on the free plan and 20,000 on paid toolkits, returns a Site Health score and lists the pages that block bots from AI systems including ChatGPT and Google. That list is the single most consequential site-side finding for GEO.
Best for
Teams already paying for Semrush that want AI crawler blocks surfaced without a new tool.
Limitations
The audit is a classic technical crawl with AI bot handling added rather than a GEO rubric, and answer-side data sits in a separate toolkit at a separate price. A 100-page free crawl samples a real site rather than auditing it.
What to verify
Confirm which crawlers the bot-block report covers, then cross-check one finding against your robots.txt.
Verdict: The most practical option when the stack is already Semrush. Read Site Health as a technical number.
5. Ahrefs Site Audit with Bot Analytics: Best for seeing which AI bots reached the site
Ahrefs Site Audit pairs a technical crawl with Bot Analytics and is free in Ahrefs Webmaster Tools at 5,000 crawl credits a month per project, so crawler access becomes an observation rather than an inference from robots.txt. Bot Analytics reports the good and bad bots crawling a verified site.
Best for
Site owners who want proof that AI crawlers arrived, not only permission to arrive.
Limitations
Site Audit itself grades classic technical SEO, and a GEO rubric was not found on the reviewed page. Bot Analytics reports traffic; a check on whether the fetched content was usable once parsed was not found on the reviewed page either.
What to verify
Confirm which AI user agents Bot Analytics names, then compare that list against the crawlers in your market.
Verdict: The strongest free evidence of crawler behaviour. Pair it with a structure and markup audit.
6. Scrunch AI Site Diagnostics: Best for a page-by-page action plan
Scrunch AI Site Diagnostics converts AI search findings into prioritised recommendations per page, one of three site-side layers beside agent traffic analysis and agent content delivery. Monitoring runs in the same platform, which closes the gap most audits leave between a score and a task list.
Best for
Teams that want site findings and answer monitoring in one workflow.
Limitations
A price was not found on the reviewed page, so a buyer has no public figure for the site-side layer apart from the monitoring subscription. The content-delivery layer changes what agents receive, a deliberate decision rather than a diagnostic.
What to verify
Ask which recommendations come from crawling your site and which from monitored answers.
Verdict: The clearest audit-to-action path here, once commercial scope is confirmed.
7. Geoptie free GEO audit: Best for a no-sign-up GEO score
Geoptie returns a GEO score across six dimensions from a URL alone, with no sign-up and results in under a minute. The dimensions are citation readiness, answer alignment, knowledge graph optimisation, content authority, technical optimisation and competitive positioning, scanned across content, schema, technical signals and bot access.
Best for
A fast first read on a site never audited for AI search.
Limitations
The crawl depth and page ceiling behind the score were not found on the reviewed page, and the six dimensions are described rather than documented, so comparing two runs needs a repeat test on your side.
What to verify
Ask how many pages the audit crawls, and whether a repeat run the same day returns the same score.
Verdict: The lowest-friction GEO score in this comparison. Use it to find a direction, not to size the gap.
8. AEO Grader: Best for a free score that ships ready-to-paste markup
AEO Grader returns a free composite score across four pillars, Authority, Clarity, Technical and Sentiment, and hands back JSON-LD schemas as code you can paste into the site, the most directly actionable free output here. The free estimate asks one engine, Gemini with Google Search grounding, and completes in about 60 seconds with no sign-up. A US$10 report queries ChatGPT, Claude, Perplexity and Gemini across a panel of buyer questions and returns verbatim answers, cited sources and share of voice. The site reports more than 10,000 reports generated.
Best for
Small teams that want a technical fix list and a cheap multi-engine read.
Limitations
The free score is a one-engine estimate rather than a crawl of every page, so it grades the brand’s public footprint more than the site’s architecture. Sentiment sits inside a technical score, mixing two measurements into one number.
What to verify
Validate any generated JSON-LD against the Rich Results Test before publishing, since generated markup can declare types your page does not support.
Verdict: The best value per dollar here. Treat the pasted markup as a draft.
9. Adobe AI Content Visibility Checker: Best for one page at a time
Adobe AI Content Visibility Checker is a free Chrome extension, listed with 10,000 users, that scores one page for citation readability and reports the share of that page accessible to AI agents. It shows an agent view beside the human view, and version 3.1.0 was updated on August 17, 2026.
Best for
Developers diagnosing why a page that renders well in a browser is invisible to a model.
Limitations
It works one page at a time, and engine querying was not found on the reviewed page, so its output is a page reading rather than a site score or a visibility finding. It is an entry point to the paid Adobe LLM Optimizer.
What to verify
Compare the agent view against the rendered page on your three highest-intent pages.
Verdict: The sharpest page-level diagnostic here, and no substitute for a crawl.
When a GEO audit agency is worth more than a GEO audit tool
A GEO audit agency is worth more than a GEO audit tool once the question moves from the site to the 20 to 30 buyer questions in your category, because a site audit describes defects and does not show which of those questions an engine answers without you. Every tool here can report that Organization schema is missing; joining that defect to the answers an engine gives is separate work.
That is a sampling problem before it is a crawling problem, needing a locked query pool, repeated phrasings per engine and an answer archive. Canlah AI runs the site audit and the query pool under one protocol.
A tool remains the right purchase when the site has never been audited or the fix list is still long.
How to choose by use case
Each of the nine GEO audit tools fits one decision best: Canlah AI for a site score traced to an evidence record, Screaming Frog SEO Spider for crawl control and Adobe AI Content Visibility Checker for a single page.
Best fit by requirement among the nine GEO audit tools reviewed September 23, 2026.
| Requirement | Best fit in this comparison | Check before you buy |
|---|---|---|
| A site score traceable to a dated evidence record | Canlah AI | Rendering mode of your crawl |
| Full crawl control and custom extraction | Screaming Frog SEO Spider | Who builds the AI checks |
| An audit document a client will read | Sitebulb | AI crawler Hints on your plan |
| Finding pages that block AI bots | Semrush Site Audit | 100 free pages is a sample |
| Proof that AI crawlers actually arrived | Ahrefs Site Audit with Bot Analytics | AI user agents named |
| Site findings joined to answer monitoring | Scrunch AI Site Diagnostics | Price of the site-side layer |
| A free GEO score with no sign-up | Geoptie free GEO audit | Same-day re-run stability |
| Free JSON-LD you can paste | AEO Grader | Generated types match the page |
| Why one page is unreadable to an agent | Adobe AI Content Visibility Checker | Same finding on other templates |
Source: vendor product pages reviewed September 23, 2026. Fit reflects public positioning, not a controlled test.
Whatever you run, record the date, the crawl depth and the rendering mode beside the score, because an audit missing those three fields cannot be compared with the next one.
Frequently asked questions
What are the best GEO audit tools?
In this comparison of nine GEO audit tools, Canlah AI ranks first for a scored site audit that keeps the evidence behind every finding. Screaming Frog SEO Spider leads for crawl control at £199 per year, and Sitebulb leads for an audit a client can read.
Is there a free GEO audit tool?
Yes. Geoptie, AEO Grader and Canlah AI’s instant audit run free from a URL with no sign-up, and the Adobe AI Content Visibility Checker is a free Chrome extension for one page. Screaming Frog SEO Spider is free to 500 URLs, Semrush Site Audit crawls 100 pages per audit free and Ahrefs Webmaster Tools gives 5,000 crawl credits a month.
Can a GEO audit tool prove that ChatGPT will cite my site?
No. A site audit measures eligibility, not outcome, so a perfect readiness score is compatible with zero mentions in every engine. Canlah AI’s September 7, 2026 self-audit scored 85 on technical SEO health and 4 on AI citation in one run. Proving citation needs repeated engine queries, not a crawl.
What is a good GEO score?
No single number counts as a good GEO score, because each tool weights different inputs and no scale is shared across vendors. Record the tool, the date and the crawl depth alongside the number, then compare movement rather than level.
Do I need a GEO audit agency, or is a tool enough?
A GEO audit tool is enough when the site has never been audited and the obvious defects are still open. A GEO audit agency earns its cost once the fix list is short and the question becomes which buyer queries an engine answers without you. That work needs a locked query pool and an answer archive, not a crawler.
Which GEO audit tools check AI crawler access?
Among the nine tools reviewed, Canlah AI reports access per bot for OAI-SearchBot, ChatGPT-User, Claude-User and Claude-SearchBot, and Semrush Site Audit lists pages blocking bots from AI systems including ChatGPT. Ahrefs Bot Analytics reports which bots actually crawled, and Geoptie scores bot access as one of six dimensions. Screaming Frog SEO Spider and Sitebulb read robots directives; an AI-specific crawler verdict was not found on their reviewed pages.
Is Canlah AI a GEO audit tool or an agency?
Canlah AI is an agency. Its instant audit is free software anyone can run by URL, and its nine-dimension DeepAudit diagnostic costs $99 for One read or $189 for Month read; the fee can be credited toward the agency service (not toward Canlah All-Stars). Teams that want self-serve crawling software should shortlist Screaming Frog SEO Spider or Sitebulb.
References
This guide reviews public product pages available on September 23, 2026. It does not use paid accounts or test crawl depth.
- Canlah AI free AI audit and AI Info. Six instant-audit dimensions and the measurement protocol.
- Canlah AI pricing. Free AI visibility report, DeepAudit prices, credit toward the agency service.
- Screaming Frog SEO Spider and version 24.0 notes. Issue count, free limit, licence price, MCP server.
- Sitebulb pricing. Hint counts, URL ceilings and MCP access.
- Semrush Site Audit and its knowledge base. AI bot blocking report and crawl limits.
- Ahrefs Webmaster Tools. Free crawl credits and Bot Analytics.
- Scrunch AI. Site Diagnostics, agent traffic, content delivery.
- Geoptie free GEO audit. Six GEO dimensions, no-sign-up flow.
- AEO Grader. Four pillars, free single-engine estimate, US$10 four-engine report.
- Adobe AI Content Visibility Checker. Citation Readability Score and listing statistics.
- Canlah AI self-audit and evidence archive, anonymised, September 7, 2026. Dimension scores, issue counts, schema state, sitemap freshness.
About the author: Haoyang Pang, founder, Canlah AI. Writes on generative engine optimization and AI-search measurement for Singapore and APAC brands. This review was drafted with AI assistance and edited for accuracy.
Do not choose an audit tool from this comparison alone. Run your site through two of them on the same day, then check whether each finding names the URL, the rule it broke and the fix.
See where your brand stands in AI answers. Run the free AI visibility audit →
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