Auth.js (formerly NextAuth.js) and Better Auth both add sign-in to TypeScript apps, and since 2025 the same team maintains both. Here’s how they differ and which one to choose.
Auth.js (formerly NextAuth.js) guides: what it is, how it compares with Better Auth, whose team now maintains it, and how to move an app from Auth.js to Better Auth.
Auth.js (formerly NextAuth.js) and Better Auth both add sign-in to TypeScript apps, and since 2025 the same team maintains both. Here’s how they differ and which one to choose.

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