Adyen is ~$10b startup and actually significantly larger than Stripe. They don't get a lot of press because they have a terrible name, most likely.
They are significantly better for large consumer facing companies than anyone.
What's so terrible about the name? (genuinely curious, I may have missed something as a non-native English speaker)
It's hard to pronounce and means nothing.
Adyen means something, just not in English. Their website says it means “again” in Surinamese, probably because a previous business of theirs was rolled into what is now Worldpay.