Open Source Alternatives to FastSpring

Gumroad

MIT

A digital marketplace platform where creators can sell digital products, from courses to software, with built-in payment processing and content delivery.

Meteroid

AGPL-3.0

Open-source pricing and billing platform that helps SaaS companies launch, test, and scale complex billing models with ease. Features metering, invoicing, and real-time data.

Polar

Apache-2.0

Comprehensive payment solution with built-in tax handling, automated benefits, and seamless integrations for digital product and SaaS businesses.