FastSpring

FastSpring is a digital commerce platform primarily for software and SaaS companies, offering an all-in-one solution for global payment processing, subscription management, and tax compliance. It provides developer tools including APIs and webhooks for integration, along with features for fraud prevention, reporting, and digital invoicing.

FastSpring is a strong match for the Stripe Payments Platform concept. It explicitly offers 'Global Online Payments' (payment-processing), 'Subscription Management + Billing' (billing-subscription-management), 'Fraud Prevention' (fraud-detection), 'Reporting and Analytics' (dashboard-reporting), and 'Developer Tools' including 'API Reference' and 'Webhooks' (developer-api-integration, webhook-event-system). The platform also highlights 'Tax Compliance' (stripe-taxes), 'Digital Invoicing' (stripe-invoicing), '23+ currencies' (multi-currency-support), and '200+ regions' with 'top payment methods' (global-payment-methods). While it doesn't explicitly mention a 'Customer Portal' by that name, it does refer to 'self-hosted account management portal' and 'Embedded Component Library' for customers to manage subscriptions, which aligns with the intent of a customer portal.