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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 SuperTokens with 14,988 GitHub stars.

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

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.

Want to compare all open source options including cloud-hosted ones? See the best open source authentication & identity →