Which brands does AI name for questions about second-hand marketplaces?

1. 01“Waar verkoop ik het beste mijn oude telefoon in Nederland?”
2. 02“Welke websites zijn betrouwbaar voor tweedehands meubels?”
3. 03“Waar koop ik refurbished elektronica met garantie?”
4. 04“Welk platform is het veiligst voor tweedehands kopen tussen particulieren?”
5. 05“Waar verkoop ik tweedehands kleding met de minste kosten?”
6. 06“Welke marktplaatsen hebben de laagste verkoopkosten?”
7. 07“Waar kan ik tweedehands fietsen kopen met garantie?”
8. 08“Welke site is het beste voor tweedehands kinderspullen?”

Without a brand name, in Dutch, with the Netherlands as market. The same set every week.

The personas behind the questions

• Verkoper die zijn oude telefoon kwijt wil
• Koper die een refurbished laptop met garantie zoekt
• Ouder die tweedehands kinderkleding koopt

Personas and questions are in Dutch: the index measures the Dutch market.

• 01Every question goes to the engines through their API in a clean session: no account, no history, no personalisation.
• 02Brand names are extracted from each answer (text extraction). Per brand the decision layer judges whether it is a real brand in this sector, whether it is a marketplace, how it is spoken about and how prominently it appears. That certainty is shown in the table.
• 03Brands only count when the probability that they are a real brand is at least 50%. Borderline cases are left out.
• 04Share is measured over a four-week window with a 95% confidence interval. Names that turn out to be the same company are merged once the decision layer confirms it.
• 05Engines without a usable API (such as Google AI Overviews) are not in this index. Browser captures of consumer products follow once the capture service is publicly available; those will be labelled separately.