Ask HN: What payment processors do crypto companies use?

[metahatem]

Hello HN

I'm one of the developers building Etherparty, a blockchain agnostic platform to create smart contracts.

I've been looking to integrate with Stripe or Braintree for payments but I realized that our business model is prohibited on both platforms.

This leaves me wondering, are there any payment providers that would work with us?

Also, does anyone know what payment processors Coinbase and the like use?

Thank you