Better Auth
Better Auth is a YC Spring 2025 (P25) company. Based in San Francisco, CA, USA. Team of 4.
About Better Auth
Summary
Better Auth builds an open-source authentication framework for TypeScript developers, covering everything from basic credential login to enterprise SSO, SAML 2.0, SCIM, and AI agent auth, all running inside the developer's own backend against their own database. It replaces hand-rolled auth code and third-party auth services by shipping sessions, social sign-on, multi-tenancy, passkeys, and fraud detection as composable, plugin-based modules. An infrastructure layer on top adds user management, transactional messaging, and global session storage for teams that need to scale.
Business model
A free open-source framework plus a paid infrastructure layer for user management, bot detection, messaging, and global session storage.
Go-to-market
TypeScript developers adopt Better Auth directly through its CLI and open-source package, with enterprise teams upgrading to the infrastructure layer for managed scaling features.
From the Y Combinator listing
The authentication framework for TypeScript
Better Auth is a comprehensive authentication framework for TypeScript that lets you implement everything from simple auth flows to enterprise-grade systems directly on your own database, embedded in your backend. It’s loved by developers all over the world and endorsed by leading voices in the ecosystem. On top of the framework, Better Auth also provides an infrastructure layer to help you scale with user management and analytics, bot and fraud detection, transactional email and SMS, global session storage and more.
Facts
- B2B / B2B -> Security
- San Francisco, CA, USA
- 4
- Active
- Early
Founders (1)
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