Payment Infrastructure
Polar
A modern payment infrastructure platform that serves as a merchant of record, enabling businesses to sell digital products and SaaS with minimal code integration.
8,980 stars
Last commit Jan 7, 2026apache-2.0
Autumn
An open-source abstraction layer that simplifies Stripe billing implementation, enabling complex pricing models with just 3 functions and zero webhooks.
2,279 stars
Last commit Jan 7, 2026apache-2.0