Payment Gateway Integration for Online Marketplace (we don’t want stripe, Braintree, 2checkout and PayPal)

We're seeking a skilled freelancer to integrate a payment gateway suitable for our online marketplace. This payment gateway should have the capability to manage and support marketplace transactions, cater to start-ups, and offer split payment functionality.

Please note - we not interested in stripe connect, Braintree, 2check out or PayPal.

We looking for other alternatives to add to our website.

Key Requirements:
- Integration of a suitable payment gateway for our marketplace
- Marketplace transaction support
- Start-up friendly
- Split payment functionality

Please provide details of your experience with similar integrations and any relevant work samples.