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Better Auth is an open source TypeScript authentication framework with MFA, social sign-on, multi-tenancy, and session management for any TypeScript backend. A self-hosted alternative to Clerk and Auth0. MIT licensed.
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Svix is an open source webhooks-as-a-service platform that handles delivery, retries, signing, and a customer-facing developer portal for managing webhook endpoints in your application. MIT licensed.
Better Auth is an open source TypeScript authentication framework that provides MFA, social sign-on, multi-tenancy, and session management as a library you run in your own application, without routing authentication through a managed identity provider.
Authentication services like Clerk, Auth0, and WorkOS simplify implementation but create a critical dependency: every authentication event for every user passes through the provider's servers. Pricing scales with monthly active users, making identity increasingly expensive as applications grow. Teams building regulated applications or multi-tenant SaaS face a particular tension: they need complete auth features but cannot accept vendor lock-in or data residency concerns from a managed identity cloud.
Better Auth is a TypeScript library that runs inside your own application. It handles password hashing, session management, OAuth flows, and MFA without any external service. Configure providers, plugins, and adapters in TypeScript code; Better Auth integrates with any backend framework (Next.js, Express, Hono, Remix). Email/password, OAuth, and passkey flows are all built-in. MIT license applies.
Better Auth is best for TypeScript developers building web applications who need a full-featured authentication library they can run self-hosted, without paying per-MAU pricing or routing authentication events through a managed identity provider.
Unlike Clerk, which charges per monthly active user and processes all authentication on Clerk's managed cloud, Better Auth is MIT licensed and runs inside your own application. Clerk offers a polished hosted UI with no backend setup; Better Auth gives you full authentication code ownership with no MAU-based pricing.
