So now there are 5 players in this space (that I know of).
Ordered by the launch date of their marketplace offering: WePay, Balanced Payments, Stripe, Paymill, Braintree.
Edit: Added WePay.
Ordered by the launch date of their marketplace offering: WePay, Balanced Payments, Stripe, Paymill, Braintree.
Edit: Added WePay.
Disclaimer: I used to work on it in my past life.
But congrats to Braintree on the launch!
(Disclosure: I'm a co-founder of Balanced)
Can't edit it anymore...