2fa GitHub Repositories (2026) · Open Source Tools

The Single Sign-On Multi-Factor portal for web apps. OpenID Certified™ and Post-Quantum Cryptography Ready.

The easiest, most secure way to use WireGuard and 2FA.

Modern authentication, on your terms. Open source alternative to Auth0, Clerk, WorkOS, Stytch.

One Time Password (OTP) / 2FA for Node.js and Browser - Supports HOTP, TOTP and Google Authenticator

Open source Auth0/Keycloak alternative. Passkeys, SSO, MFA, passwordless, biometric login. Self-hosted or cloud. Enterprise-ready for SaaS & mobile apps

A Web app to manage your Two-Factor Authentication (2FA) accounts and generate their security codes

💚 End-to-end encrypted cloud for everything.

The tiniest OpenID Certified™ authorization and authentication server you have ever seen.

ZITADEL - Identity infrastructure, simplified for you.

📱 Two-Factor Authentication (2FA) client for Android + Wear OS

Your data, your control. Fully open source, authentication and authorization. No lock-ins. Deployment in Railway in 120 seconds || Spin a docker image as a micro-service in your infra. Built in login page and Admin panel out of the box.

A private desktop authenticator that keeps your codes within reach.

Two-Factor Authentication for WordPress.

WebAuthn ruby server library ― Make your Ruby/Rails web server become a conformant WebAuthn Relying Party

A one-time password (HOTP/TOTP) library for Java

NodejS Monorepo Template

Source code for 2FAS Auth iOS app

Python implementation of the mobile Blizzard Authenticator (TOTP)

A secure, high-performance, multi-tenant platform for remote App ”Hosting“ and ”Computing“

🔑 Second factor provider using an external messaging gateway (Signal, SMS, Telegram, WhatsApp and XMPP)