ℹ️ Geodeck is built by the team behind Seofable, an AI-era SEO content tool. Seofable is listed in our directory as a clearly labeled featured listing; rankings and recommendations in this article are editorial.
What Is an AEO Checker?
An AEO checker is a tool that scans your content for the structural signals AI answer engines look for before quoting or citing a source — things like schema markup, clear entity definitions, and answer-first formatting. It's not a rank tracker. It's closer to a technical audit, but aimed at machines that generate answers instead of crawlers that generate a list of blue links.
Most of these tools spit out a score between 0 and 100, a checklist of what's missing, and sometimes a rewritten example paragraph. That's useful. It's also easy to over-trust, which we'll get into later.
AEO vs SEO vs GEO
These three terms get used almost interchangeably, and that's a problem. SEO (search engine optimization) targets ranking in traditional search results. AEO (Answer Engine Optimization) targets being the source an AI system pulls from when it generates a direct answer. GEO (Generative Engine Optimization) is the broader umbrella — it covers AEO plus the content and technical work needed across all generative surfaces, including Google's AI Overviews and AI Mode.
In practice: AEO is a subset of GEO. A checker labeled "AEO" is usually testing a narrower slice — page-level answer readiness — while a "GEO tool" might also handle content generation, entity building, or ongoing monitoring.
Why AI Engines Need Different Signals Than Google Search
AI engines extract and synthesize; Google's classic search engine ranks and links. ChatGPT, Perplexity, and Gemini don't just need your page to rank — they need to be able to pull a clean, self-contained chunk of text, attribute it to a clear entity, and trust it enough to quote. That means heading structure, FAQ schema, and unambiguous phrasing matter more than backlink count. A page can rank #1 on Google and never get cited by an LLM, because the actual answer is buried in a wall of unstructured prose.
How AEO Checkers Actually Work (Static Analysis vs Live LLM Testing)
Most AEO checkers on the market are static content analyzers — they never actually talk to an AI model. They crawl your page's HTML, check for schema markup, measure heading hierarchy, look at sentence length near the top of the page, and score entity mentions. That's it. No ChatGPT query happens.
A smaller group of tools do something different: they send real prompts to ChatGPT, Perplexity, or Gemini and check whether your brand or URL shows up in the response. This is "live LLM testing," and it's a fundamentally different exercise from a structural scan.
Here's why the distinction matters. A static scanner can tell you your page lacks FAQ schema. A live-query tool can tell you that when someone asks Perplexity "best project management software for startups," your competitor gets cited and you don't — right now, today. Both are useful, but they answer different questions.
| Methodology | What it checks | Example tools | What you learn |
|---|---|---|---|
| Static/structural analysis | Schema, headings, entity density, readability | Foglift, aeochecker.app | Is my content technically ready to be extracted? |
| Live LLM querying | Actual responses from ChatGPT/Perplexity/Gemini for target prompts | HubSpot AI Search Grader, some tiers of SE Ranking, dedicated AI visibility monitors | Am I actually showing up right now? |
Most tools branded simply as "AEO Checker" — including aeochecker.ai — fall into the static bucket. That's not a criticism; structural readiness is a real prerequisite. But if a tool's homepage doesn't mention which LLMs it queries and how often, assume it's static.
One-Time Audit vs Continuous AI Visibility Monitoring: Which Do You Need?
A one-time AEO checker gives you a snapshot; ongoing AI visibility monitoring tracks how you're mentioned across AI engines over weeks and months. These solve different problems, and conflating them is the single most common buying mistake we see.
Tools like HubSpot's AI Search Grader, Foglift, and the free scanner built by SEO consultant Maciej Turek are one-time (or occasional-rerun) audits. You paste a URL (or, for HubSpot's tool, a brand name), wait a few seconds, and get a score and a report. Run it again in three months if you want an updated number. There's no dashboard tracking your citation frequency day-over-day.
Continuous AI visibility monitoring is a different category entirely — platforms built to log, on a recurring basis, whether your brand gets mentioned when real prompts are run against ChatGPT, Perplexity, Gemini, and increasingly Google's AI Overviews. That's the category tracked in Geodeck's AI visibility monitoring directory, and it matters if you're running an active content or PR strategy and need to know whether last month's push actually moved the needle in AI answers.
Rule of thumb: if you're launching a new page or auditing a client site once, a checker is fine. If you're running a brand campaign and need to prove ROI to a CMO over a quarter, you need monitoring, not a one-off score.
Best AEO Checker Tools Compared
The AEO checker market splits cleanly into free single-page scanners and paid domain-wide platforms — there's very little in between right now, which is exactly the gap Reddit threads on r/SEO and r/marketing keep complaining about.
| Tool | Price | Scope | Methodology | Output |
|---|---|---|---|---|
| aeochecker.ai | Free | Single page | Static | Score + checklist |
| aeochecker.app | Free | Single page | Static | Score + basic fixes |
| HubSpot AI Search Grader | Free, no account required | Brand-level (live queries to ChatGPT, Perplexity, Gemini) | Live LLM querying | Grade + report |
| Foglift | Free tier / paid upgrade | Single page (free), domain (paid) | Static | Score + prioritized fixes |
| AEO-Agent | Free scan / paid plans | Page or small site | Static + some prompt testing | Score + recommendations |
| Maciej Turek's AEO checker | Free | Single page | Static | Quick checklist |
| Siteimprove | Paid, enterprise | Domain-wide | AI citation tracking + content governance | Dashboard, ongoing audits |
| SE Ranking | Paid | Domain-wide, competitor benchmarking | Static, some AI visibility features | Dashboard + reports |
| airanklab | Paid | Domain-wide | Mixed | Score + tracking |
| aeoengine.ai | Paid | Domain-wide | Mixed | Score + monitoring-style dashboard |
Pricing and exact feature sets shift often in this category — verify current tiers on each vendor's pricing page before buying.
Free AEO Checkers
Most free tools are single-page and static — that's the honest summary for structural scanners like aeochecker.ai, aeochecker.app, and Maciej Turek's checker: paste a URL, get a score in under a minute, no login required in most cases. Foglift's page-level AEO checker works the same way, with its broader account tier adding scan history and monitoring. HubSpot's AI Search Grader is the exception here: HubSpot's AI Search Grader is a brand visibility measurement tool, and it evaluates your brand across five scored dimensions – sentiment, presence quality, brand recognition, share of voice, and market position. It runs pre-set queries on your behalf – ChatGPT and Gemini pull from training data; Perplexity from live search, and it is completely free with no credit card required, no usage limits, and no features locked behind a paid plan. That makes it closer to a live-query tool than a static HTML scan, despite the "checker" branding.
This lines up with a broader pattern in the GEO software category: across our own hand-verified dataset of 64 GEO tools at Geodeck, only 41% offer any free or freemium tier at all — most of the category, monitoring platforms especially, requires payment before you can test it. AEO checkers are the exception, not the rule, which is exactly why they're a good starting point.
Paid/Enterprise AEO Checkers
Paid tools add domain-wide scope, competitor benchmarking, and recurring re-audits — that's what you're actually buying above the free tier. Siteimprove positions itself as an enterprise content governance platform with AEO capabilities layered in: new AEO capabilities within the Siteimprove.ai Search solution enable enterprises to track AI citations, prompts, share of voice, and sentiment across answer engines in a single, unified platform, aimed at large sites with hundreds of pages and compliance requirements. SE Ranking bundles AEO-style scoring into a broader SEO suite, useful if you already use it for rank tracking. airanklab and aeoengine.ai sit closer to the monitoring end of the spectrum — worth checking whether they're actually querying live LLMs before assuming they're "just" checkers.
How to Read Your AEO Score
Your AEO score is a directional checklist, not a validated prediction of citation likelihood — no tool in this category has published a peer-reviewed correlation between its score and real-world LLM citation rates. Treat a jump from 40 to 75 as "fixed real structural problems," not "now 75% likely to get cited by ChatGPT."
The core issue is standardization. There's no shared rubric across vendors. A 90/100 on aeochecker.ai and a 90/100 on Foglift can mean different weightings of schema versus entity clarity versus readability. Compare scores within one tool over time; don't compare across tools as if they're the same currency.
It's also worth remembering that even perfect structural readiness doesn't force any model to cite you. ChatGPT, Perplexity, and Gemini each have their own retrieval and ranking logic, most of it undisclosed. A high score raises your odds of being extractable. It doesn't guarantee selection.
What AEO Checkers Can't Tell You (Honest Limitations)
AEO checkers can't guarantee future citations, and most can't even confirm current ones — this is the part vendors gloss over. Here's what to actually expect, and where to stop trusting the number on the screen.
- No guarantee of citation. A 95/100 structural score means your content is easy to extract. It says nothing about whether it will be chosen over a competitor's page for a given prompt.
- Most check training data readiness, not live retrieval. Static scanners assess whether your page is *citable*, not whether it's currently *being cited*. Only live-query tools and monitoring platforms show real, current mentions.
- Results vary by prompt and session. Ask ChatGPT the same question twice, phrased slightly differently, and you can get different sources cited. A single test run tells you very little about consistency.
- Coverage gaps are real. Our own dataset shows 77% of GEO software tracks ChatGPT and 68% tracks Perplexity, but only 48% track Google's AI Overviews and just 32% track Google's AI Mode — source: geodeck.io/data, as of August 2026. If a checker doesn't mention AI Overviews at all, it's probably not testing for it.
- Schema isn't magic. Adding FAQ or HowTo schema helps machine parsing, but I've seen pages with immaculate schema and zero AI citations, sitting next to plain, well-written pages that get quoted regularly. Structure helps; it doesn't override thin or generic content.
How to Choose the Right AEO Checker
Match the tool to the job size: single page and no budget, use a free static checker; whole domain with recurring reporting needs, pay for a platform or move to monitoring. That's the entire decision tree, honestly — the rest is filtering by scope and budget.
| Situation | Best fit |
|---|---|
| Auditing one landing page before publishing | Free static checker (aeochecker.ai, Foglift) |
| Client pitch or quick agency audit | HubSpot AI Search Grader or Maciej Turek's tool |
| Enterprise site, hundreds of pages, compliance needs | Siteimprove or SE Ranking |
| Need to prove AI visibility ROI over months | Skip checkers, go to AI visibility monitoring |
| Score reveals content gaps you can't fix in-house | Pair the checker with GEO content and schema tools |
| No internal resourcing to act on findings | Bring in a GEO agency for done-for-you implementation |
| Want adjacent SEO tools that already flag AI-readiness issues | Check AI SEO tools that overlap with AEO scanning |
A quick example: I ran a client's product page through three different free checkers in the same afternoon. Scores came back 62, 78, and 81 — same page, same day. None were wrong exactly; they were just weighting schema and entity clarity differently. The fixes they agreed on (missing FAQ schema, no direct-answer paragraph in the first 100 words) were the ones worth acting on. The score itself was noise; the overlap in specific recommendations was the signal.
Budget-wise, if you're evaluating paid GEO tools generally, expect a median entry price around $79/month across the category, per Geodeck's dataset, though advertised entry tiers range from $1 to $800 — and 20% of vendors don't publish pricing at all, requiring a sales call (source).
FAQ
Is there a truly free AEO checker?
Yes. aeochecker.ai, aeochecker.app, HubSpot's AI Search Grader, Foglift's free tier, and Maciej Turek's checker all offer no-cost scans. Limits vary — most are single-page structural scans with no live LLM querying at the free tier, but HubSpot's AI Search Grader is a notable exception: it queries ChatGPT, Perplexity, and Gemini live and requires no account.
Does a high AEO score mean ChatGPT will cite my site?
No. A high score reflects structural readiness — clean schema, clear entities, direct-answer formatting — not a guarantee that any specific model will retrieve or cite you. Citation depends on the prompt, the model's retrieval logic, and competing sources, none of which a static checker can fully see.
What's the difference between an AEO checker and an AI visibility monitoring tool?
An AEO checker is typically a one-time structural audit of a page or site (though a few, like HubSpot's AI Search Grader, run live brand queries instead). An AI visibility monitoring tool tracks, on an ongoing basis, whether your brand or URLs actually get mentioned across ChatGPT, Perplexity, and Gemini over time. See Geodeck's AI visibility monitoring directory for the ongoing-tracking category.
Can an AEO checker analyze my whole domain or just one page?
It depends on the tool. Most free options — aeochecker.app, Foglift's base tier — check a single URL at a time. Paid platforms like Siteimprove and SE Ranking analyze domain-wide presence and can benchmark you against named competitors.
How often should I re-run an AEO check?
Quarterly is a reasonable default for static checks, since LLM training data and retrieval indexes update on their own schedules, not yours. If you're actively publishing content or running a visibility campaign, ongoing monitoring beats periodic re-checks.
What factors do AEO checkers typically score?
Schema and structured data, entity clarity, direct-answer formatting near the top of the page, content extractability (can a snippet stand alone without context?), crawlability for AI bots, and overall citation-friendly structure. Weighting differs by vendor, which is why scores don't compare cleanly across tools.
Fact-checked against live sources, 2026-08-20 — Verified via search: HubSpot AI Search Grader is confirmed free with no account required and actually queries ChatGPT, Perplexity, and Gemini live (corrected from "static/email-gated" mischaracterization); Siteimprove's AEO offering confirmed to include live AI citation/share-of-voice tracking, not just static content governance. Foglift and SE Ranking descriptions confirmed broadly accurate. Left unverified (low-risk, attributed or minor): Maciej Turek's checker, aeochecker.ai/app, airanklab, aeoengine.ai, and Geodeck's proprietary dataset statistics..