Open-source billing infrastructure on top of Stripe for usage-based pricing, credits, and feature entitlements via a three-function API.
Autumn is open-source billing infrastructure that runs on top of Stripe, acting as the system of record for subscriptions, usage metering, credits, and feature entitlements. It exposes a three-function API (attach, check, track) with no webhooks required and handles common pricing models including usage-based, credits, subscriptions, rollovers, and custom enterprise pricing. It does not replace Stripe but enforces entitlements and feature access alongside Stripe's payment processing. Autumn is a product of Autumn.
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