Fourthwall
Caisse
Fondy | Online Payment Gateway & Payment Proccessing
Wave
Lago - Open Source Metering & Usage-Based Billing
Polar — The best monetization platform for developers | Polar
Klarna : Payez en 3 fois. Sans frais.
Payplug: the online and in-store payment solution
Payment in installments. Simple. Guaranteed.
Stripe
Mollie Payments : Pour des Paiements en Ligne Simples