Better Auth
Free and open source (MIT); optional managed dashboard from $20/mo
Open-source TypeScript authentication framework that runs inside your app and stores users in your own database
Better Auth is a library, not a hosted service. You install it in your TypeScript app, point it at your own database, and it handles sign-in and OAuth providers, with plugins for the extras. Your users stay in your database, and the framework itself costs nothing.
It suits developer founders who want to own their auth without writing it from scratch. The team also took over Auth.js (formerly NextAuth.js), and Better Auth’s site announces that it is joining Vercel.
The paid part is an optional managed dashboard with audit logs, security detections, transactional email and SMS, and single sign-on. Starter is free with one seat; Pro is $20/month plus usage.
Pros
- Free under the MIT licence; you pay only if you want the optional managed dashboard
- Works across frameworks and lets you bring your own database
- Plugins add OAuth providers and security features such as rate limiting, bot detection and breached-password checks
Cons
- Built for TypeScript projects only
- It runs inside your own app, so updates and security patches are your job, unlike hosted services such as Clerk or Auth0
- The free Starter dashboard keeps audit logs for one day and caps them at 10,000 a month
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