[domk]

Would Stripe's Connect work for you? They have all the tools for setting up a platform that onboards merchants, takes payments on their behalf and pays them out. You can sign up and use the sandbox for free, and only pay when you process transactions.

[hknmtt]

No, I am never going to trust an American company with my finances. That includes BrainTree, former EU equivalent to Stripe, owned by PayPal.