Answer Engine Optimization

Know where AI engines rank you. Every day.

AEO.day monitors your brand across ChatGPT, Perplexity, Gemini and Claude with statistics you can defend: repeated daily samples and confidence intervals, not fake rank positions.

Start free. Monitor forever.Grade your brand in 60 seconds
Lumen SkincareWorkspace
ChatGPTPerplexityGeminiClaude

Visibility, 7d

58%

95% CI 52 to 64

Share of voice

31%

of 4 tracked brands

Samples, 7d

84

3 per prompt per day

Mention rate, ChatGPT, 30 days

shaded area = 95% CI

80%60%40%20%58%
Illustration of the live dashboard.

The problem

The market has a measurement problem

AI visibility tools sell precision the underlying data cannot support. Three facts explain why.

AI answers are nondeterministic

Ask an engine the same question ten times and you get different brand lists. In a public 3,000-prompt study, fewer than 1 in 100 identical runs returned the same brands, and mention rates for a single brand can swing between 20% and 80% across identical runs.

Rand Fishkin (SparkToro), 3,000-prompt study

Engines cite different webs

Roughly 89% of the sources ChatGPT and Perplexity cite do not overlap. A blended cross-engine score hides this, and advice that helps you in one engine can do nothing in another. Measurement has to be per engine.

Published citation-overlap research, ChatGPT vs Perplexity

Small traffic, outsized conversion

AI referral traffic is still under 1% of most sites' visits, but reported conversion rates run from about a third higher than classic search referrals to several times higher, depending on the study. The volume is early. The intent is not.

Industry referral-traffic studies, 2025 to 2026

How it works

Three steps, then it runs itself

01

Add your brand and competitors

Name your brand, its aliases, your domain, and the competitors you want benchmarked. Import prompts from CSV or start from suggestions.

02

We sample the engines daily, multiple times

Every prompt runs against every tracked engine several times a day. One answer is an anecdote. A sample is a measurement.

03

Read trends with confidence intervals, act per engine

Mention rates arrive as rolling 7-day trends with 95% intervals, plus separate citation analysis and recommendations for each engine.

What you get

Built for measurement, not theater

Confidence-interval trends

Every visibility number ships with a 95% Wilson interval and the sample count behind it. When the data cannot support a claim, the chart says so instead of pretending.

Per-engine playbooks

Engines cite different webs, so we never average them into one score. You get separate trends and separate actions for ChatGPT, Perplexity, Gemini and Claude.

Citation source analysis

Every cited URL is classified as owned, competitor, or third party. The third-party bucket is where most of the actionable work lives, and we rank it for you.

AI crawler analytics from your logs

Point a log drain at our ingest endpoint and see GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot and the rest fetch your pages, with spoofed traffic flagged by IP verification.

Agency workspaces and shareable reports

One org, a workspace per client, unlimited seats on every plan. Read-only share links for clients, and white-label reporting on the Agency plan.

Evidence-graded recommendations

We label every tactic Experimental, Correlational, or Unsupported. Yes, that means we tell you llms.txt does not work.

Our position

We will not sell you an AI rank score.

A single AI answer is one observation from a random process. Ranking brands from one observation is statistically indefensible, and it is what much of this category sells. We sample every prompt repeatedly, report mention rates with Wilson confidence intervals over rolling 7-day windows, and publish the entire method. When we do not have enough samples to say something, we tell you that instead.

Read the methodology

Pricing

Public prices. No sales call.

Full comparison

Free

$0/mo

Free forever. No card.

  • 10 prompts
  • 1 engine
  • Weekly runs
  • 1 sample per prompt per day
  • 1 workspace
Start free

Starter

$79/mo

  • 50 prompts
  • 4 engines
  • Daily runs
  • 3 samples per prompt per day
  • 3 workspaces
Start 14-day trial

14 days free, then the plan price. Cancel anytime.

Growth

$249/mo

  • 250 prompts
  • All engines
  • Daily runs
  • 3 samples per prompt per day
  • Unlimited workspaces
Start 14-day trial

14 days free, then the plan price. Cancel anytime.

Agency

$599/mo

  • 1,000 prompts
  • All engines
  • Daily runs
  • 5 samples per prompt per day
  • Unlimited workspaces
  • White-label reports
Start 14-day trial

14 days free, then the plan price. Cancel anytime.

No per-engine fees. Unlimited seats on every plan. Monthly billing always.

FAQ

Direct questions, direct answers

Is this SEO?
No. SEO measures where pages rank in search results. AEO measures whether AI engines mention and cite your brand when they answer questions in your category. The two overlap (engines lean on search indexes) but they are measured differently and improved differently. AEO.day monitors the answers themselves.
Which engines do you monitor?
ChatGPT, Perplexity, Gemini and Claude at launch, each sampled through its official API with web search enabled. Google AI Overviews and AI Mode are supported where SERP data access is configured. Copilot and Grok are on the roadmap and are labeled coming soon in the product, not silently faked.
How is visibility measured?
Each prompt is sampled multiple times per day per engine. We record whether your brand was mentioned in each answer, then report the mention rate over a rolling 7-day window with a 95% Wilson confidence interval and the sample count. No single-run ranks, ever. The full method is on the methodology page.
Do you support agencies?
Yes, natively. Workspaces are per-client projects under one organization, seats are unlimited on every plan, reports have read-only share links, and the Agency plan adds white-label reporting. Billing is monthly on every tier, so you can match it to client retainers.
What does the free plan include, forever?
10 prompts, 1 engine, weekly runs, 1 workspace, and the same honest reporting as paid plans. It is not a trial and it does not expire. To our knowledge it is the only persistent free monitor in the category.
Why should I trust your numbers?
Because we show our work. Every metric carries its sample size and confidence interval, raw answers are stored and inspectable, the sampling method is public, and recommendations are labeled by evidence strength, including the ones we cannot support.

Know what the engines say about you.

Set up in minutes. Free forever on 10 prompts. No card required.

Start free. Monitor forever.Grade your brand first