Turn usage into revenue. Polar is the financial layer for a new generation of intelligent software, built for AI startups that need to charge for tokens, agents, and compute without building billing infrastructure from scratch.

• Ship any pricing model in an afternoon. Usage billing, subscriptions, seats, credits, trials, and discounts. Compose them however your product charges.
• Meter what matters. Bill tokens, API calls, agent runs, GPU seconds, and storage with precision down to the event.
• Checkouts that convert, realtime metrics, and worldwide tax handled for you.
• We're the merchant of record, so we take on the billing boilerplate (receipts, customer accounts, dunning) and the headaches (sales tax, VAT) on your behalf.

• AI completions: wrap any model with metered token billing on every call.
• Autonomous agents: charge per run with step-level granularity, retries without double-billing.
• GPU & compute: meter fine-tuning, hosted inference, and training runs by the second.

• Starter (free): 5.00% + 50¢ per transaction
• Pro: 3.80% + 40¢ per transaction
• Growth: 3.60% + 35¢ per transaction
• Scale: 3.40% + 30¢ per transaction
• Eligible startups can apply to the Startup Program for a year on our most generous plan
• Additional fees may apply. Read more

💬 Feature requests & bugs can be reported through the "Feedback" button found in the sidebar, bottom left of your Polar dashboard.

🔓 Found a security vulnerability? We greatly appreciate responsible and private disclosures. See Security

You can integrate Polar on your docs, sites or services using our Public API and Webhook API.

We also maintain SDKs for the following languages:

• JavaScript (Node.js and browsers): polarsource/polar-js
• Python: polarsource/polar-python

Our DEVELOPMENT.md file contains everything you need to know to configure your development environment.

_{♥️🙏 To our pyproject.toml friends: FastAPI, Pydantic, Dramatiq, SQLAlchemy, Githubkit, sse-starlette, Uvicorn, httpx-oauth, jinja, blinker, pyjwt, Sentry + more
♥️🙏 To our package.json friends: Next.js, TanStack Query, tailwindcss, openapi-typescript-codegen, axios, radix-ui, cmdk, framer-motion + more
♥️🙏 To IPinfo that provides IP address data to help us geolocate customers during checkout.}

Licensed under Apache License, Version 2.0.