Does ChatGPT understand your website? A free AI Visibility Check runs 33 checks and delivers ready-made building blocks

Wörthsee, Germany, November 9, 2026. I4U, the consultancy of marketing expert Manfred “Luigi” Lugmayr, offers the AI Visibility Check, a free online check for companies in German-speaking Europe. It runs 33 checks in five areas and shows whether AI assistants such as ChatGPT, Perplexity, Gemini and Claude can read, understand and trust a website. It also compares the website with a competitor and delivers ready-made building blocks instead of general advice.

If you are missing from an AI assistant’s answer, nobody calls you. The companies that get named are the ones whose website says clearly who does what for whom, and that other sites write about. Good design alone doesn’t help. The check measures the technical and content groundwork for that.

33 checks in five areas

1. GEO: can AI search bots such as OAI-SearchBot, Claude-SearchBot and PerplexityBot reach the pages, including through the firewall? Is the content readable without JavaScript? Is there an llms.txt, company data (schema.org), FAQ markup and a Wikidata entry?
2. Content and search terms: do your own terms appear in the title, heading and text, and are there answers to customer questions?
3. Trust (E-E-A-T): legal notice, about page, named contacts, address, references and reviews.
4. Authority: how strongly is the domain linked and mentioned, and is there a Wikipedia article?
5. Tech and speed: HTTPS, response time, sitemap, canonical, mobile display, alt texts and, on request, Google’s Core Web Vitals.

Unlike many quick tests, the check reads up to eleven pages instead of just the homepage, checks the search terms a company wants to be found for, and puts a competitor next to it point by point.

“Most gaps are small: a blocked crawler, missing company data, no FAQ. Much of it can be fixed in hours, you just need to know where. That’s why the check doesn’t give advice, it gives building blocks you can install straight away.”

Full report with ready-made building blocks

The short result appears without sign-up. The full report is also free and contains all 33 checks with reasoning and effort, a ready-made llms.txt, Organization code following schema.org, a load-time measurement from Google, the competitor comparison and a PDF version. For this it asks for a name and a business email address; tips by email only follow once the address is confirmed.

The check measures domain authority with public data: Open PageRank based on Common Crawl, the Tranco list as a fallback, plus Wikidata and Wikipedia. That is an approximation, not a complete backlink profile; every point states how it was measured.

“The check measures the groundwork. Whether a company is already named in AI answers today is the second question. That’s what our test ‘Wen empfiehlt die KI?’ is for, and in a call I check it live with ChatGPT and Claude.”

Availability

The AI Visibility Check is available for free on i4u.business. It only reads publicly accessible pages. On request, Manfred Lugmayr goes through the result in a free 15-minute call.

About I4U

I4U is the consulting and publishing business of Manfred “Luigi” Lugmayr. Lugmayr has worked in marketing and digital since the 1990s, spent seven years as CMO of burgerme and today advises companies in German-speaking Europe on AI in marketing and on visibility in AI search (Generative Engine Optimization, GEO). i4u.business publishes daily AI news, guides and analysis of AI tools. The website is operated by I4U LLC.

This press release was written with AI; Manfred Lugmayr is responsible for it. How I work