Chargebee
Subscription billing and revenue management for recurring businesses
Open-Source Projects
Discover top open-source software, updated regularly with real-world adoption signals.
Discover top open-source software, updated regularly with real-world adoption signals.
Turn your software into a revenue stream effortlessly.
Polar provides a self‑hosted payment platform for developers to sell SaaS, subscriptions, and digital products, handling billing, receipts, and tax compliance with no fixed monthly fees.
Developers, open‑source maintainers, and small teams that want to monetize SaaS applications, digital downloads, or community access without building a billing system from scratch.
Polar acts as the merchant of record, automatically processing payments, generating receipts, and calculating sales tax or VAT. It supports one‑time digital products, recurring subscriptions, and gated content such as GitHub repository access or Discord support channels. The platform is delivered as a self‑hosted monorepo built on FastAPI, Next.js, and a modern TypeScript/React stack, and can be deployed on any environment that runs Docker or the provided Python/Node runtimes.
A public REST API, webhook system, and SDKs for JavaScript and Python let you integrate Polar into docs, sites, or custom services. There are no fixed monthly costs; you only pay the transaction fee of 4 % + 40¢ per successful charge.
When teams consider Polar, these hosted platforms usually appear on the same shortlist.
Looking for a hosted option? These are the services engineering teams benchmark against before choosing open source.
Monetize a private GitHub repository
Sell access tokens directly, with automatic payment processing, receipts, and tax compliance.
Launch a SaaS subscription
Create recurring plans, manage customer accounts, and collect payments without building billing infrastructure.
Offer premium Discord support
Charge for membership, automate role assignments, and handle renewal notifications seamlessly.
Distribute licensed software downloads
Sell license keys, provide secure download links, and track usage through the platform.
Supported processors are listed in the official documentation and can be integrated via Polar's API.
Yes, Polar is open source and can be self‑hosted on your own infrastructure or via container platforms.
Polar acts as the merchant of record, automatically calculating, collecting, and remitting applicable taxes.
There are no fixed monthly fees; you only pay the transaction fee of 4 % + 40¢ per successful charge.
Yes, Polar provides a public REST API, webhook system, and SDKs for JavaScript and Python for custom integrations.
Project at a glance
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