Better Auth Complete Guide

Better Auth is a framework-agnostic authentication (and authorization) library for TypeScript. It provides comprehensive features out of the box with a plugin ecosystem for advanced functionalities like 2FA, multi-tenant support, passkeys, and more.

When to Apply

Reference these guidelines when:

• Setting up Better Auth in a new or existing project
• Configuring authentication methods (email/password, social OAuth, magic link, passkey, etc.)
• Integrating with a framework (Next.js, Nuxt, SvelteKit, Astro, Hono, Express, etc.)
• Setting up database adapters (Prisma, Drizzle, MongoDB, raw SQL)
• Implementing session management, cookie caching, or secondary storage
• Adding plugins (2FA, organization, admin, API keys, anonymous auth, etc.)
• Building client-side auth UI with React, Vue, Svelte, Solid, or vanilla JS
• Securing API routes with middleware and rate limiting
• Running CLI commands (migrate, generate)