Measurement
How we measure
We measure where your customers ask: in the regular interface of ChatGPT, Perplexity, Google and Claude, not through APIs. 120 answers per measurement, each individually verifiable.
The setup
The setup is always the same: ten buyer questions that do not contain your brand name, across four engines, ChatGPT, Perplexity, Google AI Overviews and Claude, with three runs per question and engine. That is 120 documented data points per domain and measurement round. Every run happens in its own fresh session, as a reference measurement without personalisation, fixed region Germany.
The scoring
Every run is scored individually from 0 to 3: not mentioned, mentioned, cited as a source, actively recommended. Since September 2026 we save every answer as full text and as a screenshot. Scoring happens afterwards, following fixed rules laid down in writing.
Google does not return an AI Overview for every question. If none appears, we count the run as zero.
Two measurement points
We measure twice with an identical question set, once before the work and once after. Declines are reported, they go in the report.
Why the user interface
We measure the surface your buyers search in, not the interface behind it. For ChatGPT and Perplexity the API answers differently from the interface: different system prompt, different retrieval mechanics, different number. We deliberately switch personalisation off, otherwise two measurement rounds would not be comparable.
Verifiability
You get the complete question set and can ask every question yourself. Individual runs fluctuate, which is why we measure every question three times. If your sample differs from our result, we will show you the evidence.