Fiserv

Fiserv offers a comprehensive suite of payment solutions that align well with the core functionalities of a payment platform. They explicitly mention payment processing, developer APIs, fraud detection, and reporting. While they don't focus on subscription management as a primary feature on the provided pages, their broader offerings for large enterprises and small businesses, including integrated payments and card services, strongly suggest these capabilities. The 'CardHub' product specifically addresses card acquisition, usage, and growth, which implies underlying payment processing and management. The developer portal also highlights APIs for banking and commerce, reinforcing the developer-friendly aspect. They also offer solutions for marketplaces (Connect Platform) and card issuing (Issuer Solutions), which directly map to Stripe Connect and Stripe Issuing.