theory.nl
Ranked #2,667 of 9,542 companies sending people to pay, with 12K checkout visits from April to September 2026.
Where its buyers pay
- Mollie12K100% of its checkout traffic · #326 among everyone sending to Mollie
Trend, April to September
April to September: -100%. Peak in August at 5.3K visits.
theory.nl sent 12K visits to checkout pages over six months, about 2K a month, which puts it at #2,667 of 9,542 senders we traced.
100% of that went through Mollie. It uses a single checkout, so its buyers all pay through Mollie.
Similarweb files it under Travel and Tourism. It isn’t one of the AI products we classified by hand, so it doesn’t count toward the AI total.
Visits are modelled third-party estimates, not revenue. Read what this can’t tell you before you act on a single number.
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The top 500 senders for each of 15 checkouts, plus all 9,542 companies ranked. Filter by niche and compare.