Better Auth vs Stack Auth: Features, Pricing and User Reviews 2026

Better Auth is completely free to use with no costs or limitations. As an open-source project released under the MIT License, you can use it in any project including commercial applications without paying anything.

There are no usage limits, user caps, or features locked behind paid tiers. Every feature mentioned in the documentation is available to all users. This includes advanced capabilities like two-factor authentication, organization management, and all authentication methods.

The project is supported by the developer community and backed by Y Combinator. While the core framework remains free, the team behind Better Auth is building optional infrastructure services for scaling, but these are separate from the core library.

You can self-host everything on your own servers with complete control over your user data and no recurring subscription fees.

Stack Auth offers transparent pricing that scales with your needs. The Free plan is perfect for individuals and small projects, supporting up to 10,000 users with unlimited projects and teams. You get one dashboard administrator and access to all core authentication features.

The Team plan costs $49 per month and increases your user limit to 50,000 users. It includes three dashboard administrators, with additional admins available at $49 each. This plan is ideal for early startups and small teams building their products.

The Growth plan at $299 per month removes all user limits entirely. You get unlimited users, projects, and teams, along with five dashboard administrators included. Additional admins cost $49 each. This plan is designed for growing businesses that need to scale without worrying about user count restrictions.

All plans include the same core features, with the main differences being user limits and admin accounts.