Better Auth
An open-source TypeScript authentication framework that runs inside your own app and database. Plugins add 2FA, passkeys, magic links, organizations, SSO and more.
Free tier
- Open-source library: no per-user fees when self-hosted
- Works with Next.js, Nuxt, SvelteKit, Astro, Hono and more
- Bring your own database
Best for
Developers who want to own their user data with no per-MAU bill.
Watch out: You run it yourself: database, email delivery and security updates are your job. The optional hosted dashboard and security add-ons are paid.
Sources
Checked on 2026-11-11. Vendors change pricing often, so confirm on the official page before you commit.