Stack Auth
Claim this toolOpen-source authentication and user management for developers, designed for rapid integration and flexibility.
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Tracked since2026
0 reviews trackedThe Bottom Line
Entry price
Free plan available, paid tiers above
Biggest pro
Open-source, offering flexibility and control
Biggest con
Specific details on self-hosting are not immediately clear from the provided content
TL;DR - Stack Auth
- Open-source authentication and user management suite.
- Offers features like RBAC, organizations, and 3rd-party OAuth.
- Provides flexible UI options (headless/headful) and REST APIs for integration.
Pricing: Free plan available
Best for: Growing teams
What is Stack Auth?
Stack Auth provides an open-source suite of tools for authentication and user management, enabling developers to integrate robust auth solutions into their applications quickly. It offers a comprehensive set of features including organizations and teams management, role-based access control (RBAC), and third-party OAuth integrations, simplifying complex authentication flows.
This platform is ideal for developers and teams looking for a flexible, open-source alternative to proprietary authentication services. It supports various authentication methods like password, SSO, and 2FA, and provides both headless and headful UI options for seamless integration. Stack Auth aims to reduce the development overhead associated with user authentication and authorization, allowing teams to focus on their core product.
Available on: Web
Pros & Cons
Pros
- Open-source, offering flexibility and control
- Quick and easy setup, replacing existing auth solutions in hours
- Comprehensive feature set for B2B and complex user management
- Manages JWTs and access tokens automatically
- Developer-friendly with client/server APIs and UI components
Cons
- Specific details on self-hosting are not immediately clear from the provided content
- Limited SAML SSO connections in lower-tier paid plans
Preview
Key Features
Organizations & teams management with email invitationsPermissions & RBAC (Role-Based Access Control)3rd-party OAuth access (e.g., Gmail, OneDrive)Password, SSO, and 2FA authenticationImpersonation for debugging and customer supportHeadless or headful UI components (shadcn/ui integration)Client and server REST APIsAutomatic JWT and access token management
Pricing Plans
Pricing checked Jul 16, 2026
Free
Free
Team
$49 / mo
Everything in all plans.
Growth
$299 / mo
Everything in all plans, plus:
- 3 SAML SSO connections (then $99 each)
- Premium support
Included in all plans
- Custom branding
- SSO with OIDC/OAuth
- Priority support
Reviews
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Stack Auth FAQ
How does Stack Auth assist developers in managing user access?
Stack Auth provides a comprehensive set of features for user access management, including organizations and teams management, and robust role-based access control (RBAC). It simplifies complex authentication flows, allowing developers to integrate secure solutions quickly.
What kind of user or team benefits most from Stack Auth?
Stack Auth is ideal for developers and teams seeking a flexible, open-source alternative to proprietary authentication services. It helps reduce development overhead for user authentication and authorization, allowing teams to focus on their core product.
How does Stack Auth compare to FusionAuth?
Stack Auth offers an open-source suite of tools for authentication and user management, providing flexibility and control over the auth solution. It aims for rapid integration and includes features like organizations and teams management, and RBAC, similar to other comprehensive auth platforms.
Does Stack Auth include a free tier?
Yes, Stack Auth is available on a free tier, with paid plans offered for users who require more extensive usage and additional features. This allows teams to start using the platform without an initial investment.
What are the primary limitations of Stack Auth's paid plans?
A primary limitation of Stack Auth's lower-tier paid plans is the restricted number of SAML SSO connections available. This may require users with extensive SAML integration needs to opt for higher-tier plans.
Can Stack Auth manage different types of authentication methods?
Yes, Stack Auth supports various authentication methods, including password-based authentication, Single Sign-On (SSO), and two-factor authentication (2FA). It also provides third-party OAuth integrations for broader compatibility.
How does Stack Auth simplify the integration process for developers?
Stack Auth simplifies integration by offering both headless and headful UI options, along with client and server APIs. It also automatically manages JWTs and access tokens, which reduces the development effort required for authentication.
Source: stack-auth.com