Half of What an AI Cites Is Gone in Six Days. The Other Half Barely Moves.
Fourteen buying questions asked twice in August and again six days later. The full cited set overlaps 50 per cent. The durable core holds 73 per cent.
Explore insights on Generative Engine Optimization (GEO), AI visibility, and how modern brands position themselves for discovery by AI assistants like ChatGPT, Claude, Gemini, Perplexity & more.
We asked an assistant the price of 30 AI visibility tools and checked every answer against the vendor's own page. 13 of 20 right, and 4 invented prices.
Fourteen buying questions asked twice in August and again six days later. The full cited set overlaps 50 per cent. The durable core holds 73 per cent.
Ask an AI assistant for alternatives to a vendor and the vendor itself usually is not there. In one answer, neither was the category.
A sweep of 77 AI visibility vendors found one disallowing AI crawlers. The block is a managed robots.txt that stops training, not retrieval.
Across 48 vendor observations in 7 software categories, answers named a vendor 27 times and cited that vendor's own page 4 times.
Reddit is cited in 8 of 8 small-business cells and 1 of 5 enterprise ones. In 4 of 4 paired cells, only the buyer changed.
BrightEdge publishes no price. Thirteen alternatives, eleven of which do, with the engines each price buys. We are in the table.
77 AI visibility vendors asked for llms.txt and markdown on the same day. Markdown servers ship llms.txt at 62%, everyone else at 57%.
Sixteen Peec AI alternatives with the entry price read from each vendor's own page and the engines that price buys. We sell here, and we are in the table.
A week of our own edge logs by agent and path. Assistants spend a median 77 percent of fetches on articles, crawlers 4 percent. One day erases the split.
Schema markup is the standing advice for AI visibility. Of 46 readable pages that AI answers actually cited, 93% carry JSON-LD and 41% declare what the page is.
Every active vendor in our catalogue asked for markdown two ways. The category ships llms.txt at four times the rate, and no incumbent serves it.
Eleven Profound alternatives with entry prices read from each vendor's own page and the engines each one buys. We sell here, and we are in the table.
One buying question, asked twice minutes apart, in four markets. The sources that hold repeated 100% of the time in the United States and 50% in France.
Twenty buying questions in four markets, one reading each, no retries. Seventeen answered every run. All three that did not are the same category.
Publishing on a domain you do not own is sold as AI visibility. We read the robots.txt of every host that advice names. Two AI firms block each other.
11 of 15 comparable categories return identical sources whichever way you ask. 4 return almost nothing in common, and only a control tells you why.
We fetched every URL nine AI Overview answers cited and read each host's robots.txt. None was dead, and 11 cited publishers disallow AI crawlers.
We recorded the exact URL of every citation in ten AI Overviews across two markets. Domain counting hides 18 of 91 pages, and no cited page was a homepage.
We asked 69 AI visibility vendors and 122 domains we have seen cited for their llms.txt on one day. The vendors ship it far more often than the cited sites.
We fetched robots.txt from all 69 vendors in our catalogue. Seven declare Content Signals, nobody has adopted the fourth field, and one says no to training.
GeoGenie charges $100 a month for any two of five engines. The $500 tier still gives three. Verified prices, the arithmetic, and where it is the right call.
Changing the answer surface costs more than changing the day: median source overlap 0.40 against 0.63 across two days, on identical questions.
Across 29 category and market cells, 119 durable slots go to non-vendors. 79 per cent of those domains appear in exactly one cell. YouTube is in 24.
Twelve domains cited in seven of eight runs and one in one. Cited-in-every-run is not measuring stability, it is measuring whether you caught the odd run.
Thirteen categories re-asked after two days. Median source overlap 0.63, and the best and worst rows both moved when read again the same afternoon.
Pooled across six markets the vendor share climbs 4, 19, 22, 22, 38 per cent by category. Two same-language pairs each show the second market far lower.
Across 120 published measurements in four markets, the stable core stays a narrow band while cited breadth varies ninefold. The percentage moves anyway.
Six questions read deeply, then the same intent asked three ways. Only one wording returns a source set you could hand a buyer, and it is the shallowest.
Everyone defines the difference the same way. Three measurements change the decision: when an answer exists, who holds its citations, and which page wins.
Six brands asked what they cost and what their category's best is, same surface, same day. Six of six cited their own site on price. One of six on category.
We tested seven programmatic comparison pages one URL at a time. The four that name their own publisher rank for nothing at all.
Three checks, sixty-six vendors, zero failures. A clean sweep is not good news about the category, it is bad news about the checks. Here is what they miss.
Limy starts at $149 a month for three engines. The $449 plan still buys three, it just lets you choose which. The arithmetic and what we could not verify.
Thirty local service questions across three markets returned no AI Overview at all. Education and hospitality behave differently, and we found where.
Across twelve categories in three markets, one domain spans them all and almost everything else is category specific. The gatekeeper list does not exist.
Two conventions for talking to AI systems. The category adopted the one with no demonstrated reader and skipped the one with a specification.
Four category buying questions, the organic top 20 of each. Seventeen ranked lists are published by a company selling one of the tools, at position one.
Ten videos, eight channels, no vendor. Widened to 25 videos in 4 markets: 20 channels, 1 vendor, and no video or channel holding a slot in two of them.
Nineteen buying questions, four markets, three AI surfaces, 46 runs. Of 408 cited sources, 58% appeared exactly once and about a third held across every run.
Cloudflare's Bot Fight Mode challenges crawlers that are not on its verified list. PerplexityBot is not on it, and the usual test with curl cannot detect this.
Rewording a hotel question in Spain left zero stable sources. Rewording a university question in the same country left four, and none of them is a university.
One intent, four wordings, two markets. In Spain the stable share held between 30% and 48% while zero domains survived all four phrasings.
Hotels and flights asked in four markets on three AI surfaces. The gap between the two questions runs from 3 points in Germany to 53 in the United States.
We asked eleven buying questions three times each on AI Overview. Fewer than three in ten durably cited domains sell the product being asked about.
Seven sectors asked who the best marketing agency is, on three AI surfaces with the cache bypassed. 133 domains came back, 92% in one sector only.
AIclicks publishes monthly LLM response counts, which almost no vendor does. Two tiers check out to the digit. The $59 tier is 67% high.
Same category, same market, same day. Asked which platform to buy, ChatGPT cited eight domains. Asked what the thing is, it cited zero.
LLMrefs sells a single $79 plan covering 500 prompts and ten engines. Its own page gives two different country counts for the same product.
Search Atlas defines a credit as one query on one platform once. The entry AI tier costs 2.85 times per credit what the tier above it does.
Alhena sells an ecommerce AI concierge with visibility monitoring attached. Its table says All major engines and the count is in a collapsed FAQ.
BrightEdge publishes no price on its own site. Its AWS Marketplace listing says $1,000,000 for 12 months. Five other public sources give five other numbers.
Conductor sells enterprise AEO. Its pricing page has no prices, its entry tier has no AI credits, and no AI engine is named anywhere on it.
Same question, same market, same moment, four surfaces. Forty-one of fifty-one cited sources appeared on exactly one of them. Google's own three barely overlap.
Goodie's only priced plan is $399 for 3 engines. Its top card says 11 models, the table below lists 12, and all three tiers promise daily collection.
Gumshoe costs $99 or $299 a month. Its comparison table scores it 11 models against rivals' 4 to 6, then its pricing table sells 6 and 4.
42 AI Overview measurements across six categories: stability ran from every source repeating to none. Re-measured a day later, one category flipped.
HubSpot AEO is live in beta at $50 a month for 25 prompts on three engines, and HubSpot's own page credits the XFunnel acquisition as its origin.
Knowatoa costs $59 or $199 a month. Its own FAQ refers twice to a question limit that appears nowhere on the page, and never names its seven services.
Nightwatch publishes prompts and total AI responses on every tier. Divide them and every plan gives exactly thirty answers per prompt per month.
Six AI engines for $29, the cheapest six-engine plan we verified. Promptmonitor's three published numbers disagree, and a second company shares its name.
Rank Prompt sells up to 1,000 brands and 2,000 credits a month. Divide them and each brand gets two credits, which is two thirds of one full prompt.
Rankability costs $99 to $799 a month. Its own page says the plans differ only by credits, and never says what a credit buys. Entry pays 2.5x per credit.
ScalePost measures AI citations from publisher CDN logs and calls prompt sampling a guess. It is right about sampling and wrong that a fetch is a citation.
SE Ranking's plans list five LLMs. The AI Search add-on that costs 72% more names four, and Gemini is the one missing. Prices verified 7 August 2026.
Fifteen AI visibility tools that Google's AI never cited draw 151,387 US searches a month between them. The three it named that we can measure draw 7,864.
ArcAI tracks nine AI engines, the widest list we have verified. All three of its packages say Ask for a Quote, on top of a platform starting at $2,500.
Serpstat says 100+ AI models in its hero, 140+ in its FAQ, and names four. Free tier, then $39. It sells checks on one plan and credits on another.
Similarweb's AI Search Intelligence is $99 a month for 150 prompts. It tracks four engines for visibility and four more for referral traffic, and says so.
We read every source behind three AI answers. One category was answered entirely by independent reviewers, another mostly by vendors ranking themselves.
Waikay costs $69.95 for 120 prompts. Its plan names ChatGPT/Google/Claude/Sonar, and our own measurement found Google's surfaces cite disjoint sources.
We published 41% from a sample of seven. Eighteen vendors published both numbers and ten had no gap at all. Recounted properly, entry plans cover 65%.
One question, four AI surfaces, 20 domains cited and not one shared by three of them. Twice, the agency named first was the publisher of the cited ranking.
The same buying question in three markets cited 35 domains. Two appeared in all three. Of the 36 tools in our verified catalogue, five were cited at all.
We counted the top 20 for GEO agency searches in four markets. In the US, thirteen of the rankings were written by an agency that named itself number one.
HubSpot announced it was acquiring XFunnel on 31 October 2025. The standalone site still sells, with a free audit, an unpriced Enterprise tier and no middle.
Across 36 runs, three markets and nine categories, YouTube appeared in eleven measurements and in every single run of eight. Reddit is pickier.
Brand Radar is an add-on, not a plan. It is also the only tool here measuring Reddit, YouTube and TikTok, where our own runs found the citations.
Two GEO tools showed 27,100 and 9,900 searches a month. Disaggregated they are 627 and 53. And disaggregation is not enough: three more names are not theirs.
AEO is optimizing to be the answer, not a link. What separates it from GEO and SEO, what the controlled evidence supports, and what it does not.
We asked three GEO buying questions. One cited six sources, two cited nothing at all. On those, no amount of content wins you a citation.
Athena publishes its unit: one credit is one AI response. Run the arithmetic and $295 a month buys about fifteen prompts daily across eight engines.
Bluefish raised $68M and sells to the Fortune 500. It covers agentic commerce, which few other tools here do. It also publishes no price at all.
Brandlight raised $30M and calls itself the #1 AEO platform globally. We could not find who ranked it. What it covers, and what we verified.
Doubao is the second-largest AI app in the world by users and almost no Western tool measures it. What that means if you sell into China.
Cloudflare says it measures AI visibility from network signals rather than sampling. That solves one hard problem and cannot solve its own second metric.
Cognizo's $499 plan bundles 150 prompts with eight AI-written articles. Its $899 plan states an article count and no prompt count at all.
Otterly starts at $29 and names seven engines on its homepage. Four are in the plan and three are paid add-ons. What that costs, and what we verified.
Profound raised $155M at a $1B valuation and is the category leader. Its entry plan tracks one engine. What that costs, and when it is the wrong buy.
Quattr publishes more customer results than any vendor we have reviewed, with McAfee and Marriott named. Not one states a baseline. What that is worth.
Rankscale starts at $20 and names ten engines on every plan, including Mistral. It bills in credits rather than prompts. What that actually buys.
For eight days in June, 163 Google queries hitting our site carried an identical instruction preamble. A monitoring tool was leaking its own method.
We asked which tool tracks ChatGPT visibility in the US, Spain and France. Not one tool was recommended consistently in more than one market.
Semrush sells its AI Visibility Toolkit standalone at $99 a month per domain, not bundled. What it covers, how it compares, and a correction we owed.
Every tool sells share of voice and none publishes how many runs are behind it. How it is calculated, and how many runs it takes.
Five of our articles say only Evertune publishes its sampling. Siftly publishes enough to derive it, and reports confidence intervals. We were wrong.
Superlines publishes its prices, and the arithmetic says its €379 tier is the worst value on the page. Ten engines, nineteen named customers, no sampling.
Surfer's €49 plan has no AI tracker. Its €99 plan tracks ChatGPT weekly. Its €158 standalone tracker beats the €182 bundle. Every price needs a year.
We asked AI for the best universities in Madrid and Paris. It named them every time and cited student housing, tutors and relocation agents instead.
Wellows publishes its prices, which is rare here, but they are per domain. What that costs an agency, which engines it covers, and what we verified.
Six runs on Google AI Overview asking which tool tracks ChatGPT visibility. Not one of among the best-funded vendors appeared. Here is what did, and why.
We checked the 27 comparison articles Google returns for AI visibility tools. Twenty-two were published by a company selling one. Most put themselves first.
Writesonic's tracker page says ten platforms. Its pricing page puts three on every plan you can buy and the other seven behind a custom quote.
AirOps has raised about $118M and is among the best-funded player here. It is a content platform with visibility attached, which decides whether it fits you.
Evertune samples each prompt up to 100 times per model, which is the discipline most of this category skips. What it covers, who it is for, and its limits.
How an agency sells GEO without overpromising: the method, the deliverable, the pricing, and the four client objections you will meet.
Peec AI raised $29.1M in under a year and published no price until August 2026. What it tracks, who it is for, and when a cheaper tool is the better call.
Scrunch was acquired by Sitecore for $225M in June 2026. What that changes for buyers, what it now costs, and when a cheaper tool is the better call.
Three European brands in three sectors collapsed in GPT-5.3 on the same day, while US brands held. A three-week EchoWi study of a new LLM failure mode.
Step-by-step guide to making AI chatbots recommend your brand. Five strategies drawn from the research that survives scrutiny, and the limits of what it shows.
81 AI visibility tools, 80 you can still buy, with every price read from the vendor's own page in August 2026. One shut down.
Buyers are skipping Google and asking AI for recommendations instead. The brands that AI mentions win. Here's how the shift works.
GEO is how brands get cited by ChatGPT, Perplexity and AI Overviews. What the research proves, what it does not, and how to optimize a page.
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