Generally, Adyen is cheaper than Stripe but Stripe is easier to integrate. When considering moving from Stripe to Adyen, It comes down to a equation of dev cost

Generally, Adyen is cheaper than Stripe but Stripe is easier to integrate. When considering moving from Stripe to Adyen, It comes down to a equation of dev cost/resources to integrate to Adyen compared to the amount of reduced fees/increase auth rates. The more volume you process, the more a switch makes sense. and this difference of mentality is reflected by the fact Adyen has minimum monthly invoices when Stripe does not.