Open‑source authentication solution with login, signup, and session management. Self‑hosted (free) or cloud with a free tier.
SuperTokens is an open‑source authentication solution that aims to replace Auth0 with a self‑hostable alternative. It provides login, signup, and session management. Self‑hosted is free; cloud has a free tier.
I self‑hosted SuperTokens with Docker on a VPS. After integrating the SDK into a Next.js app, login, signup, email verification, and password reset all worked out of the box. Data stays on my own server.
SuperTokens is the open‑source Auth0 alternative that puts you in control of user data.
Pro tip: SuperTokens allows fully custom UI—design your own login pages instead of using pre‑built components.