Flowglad

Flowglad is an open-source payments and billing platform designed for developers. It allows users to set up product billing quickly and offers features such as metered billing and customer billing UI. The platform emphasizes ease of integration and programmability.

Flowglad is a drop-in payments and billing solution for developers, offering features like subscription management, usage-based billing, and webhooks. The documentation highlights API keys and integration guides, indicating developer API integration. The website explicitly mentions payments and billing, aligning with the payment processing and billing subscription management features.