Upd.dev
The new, free home for version control. Built for developers to share releases, push code, and define the future of open source.
Summary
Polar is an open source payments and billing platform for developers to monetize SaaS and digital products.
It acts as merchant of record, handling billing, receipts, customer accounts, and global tax/VAT while enabling sales of GitHub access, Discord roles, file downloads, and license keys via products and subscriptions. Polar offers APIs, webhooks, and SDKs (JavaScript and Python) with a monorepo architecture (Python/FastAPI backend and Next.js frontend) and transaction-based pricing of 4% + $0.40 with no fixed monthly fees.