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Best Self-Hosted Authentication & Identity in 2026

Solutions for managing user authentication, single sign-on, and identity verification across applications.

The top-rated pick is Keycloak with 35,085 GitHub stars.

3 self-hosted authentication & identity — ranked by GitHub stars. Browse all

Keycloak

Keycloak

Open-source identity and access management with SSO, OAuth2, OIDC, and SAML support for modern applications.

Alternative to:
Auth0Auth0
SuperTokens

SuperTokens

Open-source authentication solution, an alternative to Auth0 and Firebase Auth that you can self-host.

Alternative to:
Auth0Auth0
Stack Auth

Stack Auth

Open-source authentication platform for Next.js and React, built as an alternative to Auth0 and Clerk.

Alternative to:
Auth0Auth0

Why self-host?

Self-hosting puts you in control. You own your data, avoid vendor lock-in, and eliminate recurring subscription costs. For teams handling sensitive data or operating under strict compliance requirements, running your own infrastructure is often the only viable option.