Authgear

Open-source Auth0/Clerk/Firebase Auth alternative, self-hosted or cloud

PlatformWebfreemiumglobal

An open-source, extensible authentication platform offering production-ready signup/login and account pages plus passwordless logins (magic link or OTP), passkeys, mobile biometrics, two-factor, SSO and enterprise audit logs. It helps teams deploy modern consumer authentication without building it from scratch or paying per‑MAU to hosted vendors, and is available for self‑hosting or as a cloud option for SaaS and mobile app development; it is not intended for simple hobby projects.

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