[pjan]

Spreedly, TokenEx, Very Good Security are some that I'm aware of.

I'm surprised Stripe hasn't come with their own multi-processing router solution for enterprises at this point; whichever major payment processor who would do this, could become a de facto choice as primary or secondary payment gateway for enterprises requiring this.

[section_me]

hyperswitch[1] looks to be trying to work in this space.

1. https://github.com/juspay/hyperswitch

[enigma20]

Nice! Didn't know this. There are commercial solutions which offer even more integrations https://www.ppro.com