Open Source Paddle Alternatives
A curated collection of the 2 best open source alternatives to Paddle.
The best open source alternative to Paddle is Polar. If that doesn't suit you, we've compiled a ranked list of other open source Paddle alternatives to help you find a suitable replacement. Other interesting open source alternative to Paddle is UniBee.
Paddle alternatives are mainly Finance & Accounting. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Paddle.
A billing platform for AI products, letting teams meter tokens, agent runs, and compute without building payment infrastructure themselves.
Polar is the financial layer for software that charges by usage. It removes the need to build billing infrastructure from scratch, which for an AI company means metering tokens, agent runs, and compute long before any of it becomes an invoice.
Pricing models compose instead of being fixed. Usage billing, subscriptions, seats, credits, trials, and discounts can be combined however the product charges, and metering is precise down to the individual event.
Polar also acts as merchant of record, which changes how much of the billing operation a team has to run itself.
- Tax handling: sales tax and VAT are handled worldwide on the seller's behalf.
- Billing boilerplate: receipts, customer accounts, and dunning belong to the platform rather than the product.
- Checkout and metrics: hosted checkouts and realtime revenue metrics come with the integration.
- AI workloads: token billing wraps any model call, agent runs are charged with step-level granularity and retries that avoid double billing, and GPU work is metered by the second.
- API and SDKs: an HTTP API with maintained SDKs for JavaScript and Python covers docs, sites, and services.
Fees are charged per transaction, starting at 5.00% plus 50 cents on the free Starter plan and falling across the paid tiers, and eligible startups can apply for a year on the most generous plan. Feature requests and bug reports go through the dashboard, and the repository documents how to set up a development environment.
Open source subscription billing for SaaS companies that want invoicing, metering and payment management without Chargebee-scale platform costs.
UniBee is billing software for SaaS companies that have outgrown invoice scripts but do not want to hand a share of revenue to a closed platform. It positions itself against Recurly, Chargebee and Paddle, and grew out of its authors' own years with WooCommerce, WHMCS and KillBill.
The system splits into an API backend, an admin portal and a user portal, each in its own repository, so the billing engine can sit behind an existing product or be used with the portal it ships. Standalone deployment is a Docker Compose stack that brings up the database, Redis and the API together.
Between those parts the recurring revenue cycle is covered end to end.
- Subscriptions: plans are created, updated and canceled from the admin portal.
- Invoicing: invoices are generated and sent to customers automatically.
- Billable metrics: usage is tracked and reported for consumption-based pricing.
- Transactions: payments, refunds and discounts are managed in one place.
- Webhooks: account events are pushed to your own systems in real time.
- Reports: product, plan and transaction data feed reporting on business performance.
Docker, Docker Compose and Git are all a standalone install needs, and the app answers on localhost once every container reports ready. Everything is AGPLv3, with a paid cloud edition for teams that would rather not operate it themselves. Contributions go to the frontend and backend repositories rather than this one.
