Billing and monetization built for developers and open source
Polar is a merchant of record and billing platform built specifically for developer tools, open-source projects, and SaaS. Supports subscriptions, one-time products, usage-based billing, and GitHub Sponsors integration. Polar handles taxes, invoicing, and payments globally. Features a built-in storefront, benefit grants (repo access, Discord roles, license keys), and a generous free tier with 5% platform fee.
Pricing
freemium
5% platform fee on all revenue, no monthly cost
Difficulty
low
~20 min setup
Ease score
86 / 100
agent-friendliness
Auth
api key
POLAR_ACCESS_TOKEN
Completeness
88%
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typescript
npm:@polar-sh/sdk
typescript
npm:@polar-sh/nextjs
Open-source billing infrastructure between your app and Stripe. Handles subscriptions, usage ledgers, limits, and overages via three simple API functions — no webhook handling required.
Payments infrastructure for the internet.
Unkey provides a complete API key management infrastructure — create, validate, revoke, and rate-limit API keys in milliseconds. Features include per-key rate limiting, usage analytics, expiration, remaining uses, and RBAC via key metadata. Built for developer tools and SaaS products that need to expose their own APIs with per-customer keys. Sub-5ms global verification via edge network.
Privacy-first web analytics — one script, no cookies, no consent banners. GDPR/CCPA/ePrivacy compliant out of the box.
Use @polar-sh/nextjs for Next.js with built-in checkout and webhook handling. POLAR_ACCESS_TOKEN is the server secret. Webhooks deliver subscription and order events — always verify signatures with validateEvent(). Products and prices are configured in the Polar dashboard. Polar is a merchant of record so you don't need to handle taxes.