Authentication + Billing: How Clerk and Stripe Work Together

Clerk Billing integrates with Stripe to streamline authentication and billing for both B2C and B2B models, eliminating the need for separate systems and complex database management. By using Clerk's native integration, users can define plans and features within the Clerk Dashboard, with entitlements encoded directly on the session token verified for authentication. This setup allows for seamless paid-feature checks without additional database lookups or webhooks, as Clerk handles the syncing of subscription states based on Stripe's payment processing events. The integration supports both individual users and organizations, maintaining the same transaction fee as direct Stripe Billing usage. Clerk provides a practical walkthrough for setting up B2C billing, while Part 2 of the series will explore B2B billing, advanced webhooks, and offer a build-vs-buy analysis.

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