Open Source #authentication Projects

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

An open-source, single-executable Firebase alternative with sub-millisecond REST and realtime APIs, built-in auth, a WebAssembly runtime, and an admin UI.

Fast, secure, light-weight web-app to generate TOTP and HOTP tokens.

Open source realtime backend in a single file — SQLite, auth, file storage, and admin UI in one Go binary.

The tiniest OpenID Certified self-hosted authentication and authorization server, with OAuth, OIDC, LDAP, 2FA, and Traefik/Nginx/Caddy middleware support.

Simple OTP app for desktop and mobile.

Open-source, end-to-end encrypted cloud for photos, videos, and 2FA secrets — a privacy-first Google Photos and iCloud Photos alternative.

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

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

Toofer is a local-first, web-based two-factor authentication app that stores your TOTP secrets directly in your browser. Private, simple, fully offline.

Free, open-source cross-platform TOTP authenticator with self-hostable sync backend, built with Flutter.