Top 27 two-factor open source projects

List of sites with two factor auth support which includes SMS, email, phone calls, hardware, and software.

**NOT MAINTAINED** Two-factor authentication for Node.js. One-time passcode generator (HOTP/TOTP) with support for Google Authenticator.

🔑 Second factor TOTP (RFC 6238) provider for Nextcloud

.Net library for Two Factor Authentication (TFA / 2FA)

One Time Password (HOTP/TOTP) library for Node.js, Deno and browsers.

🔑 U2F second factor provider for Nextcloud

Vonage Server SDK for Java. API support for SMS, Voice, Text-to-Speech, Numbers, Verify (2FA) and more.

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

🔐 multi factor authentication system (2FA, MFA, OTP Server)

Two factor authentication.

Craft plugin for two-factor or two-step login using Time Based OTP.

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

PHP library for Two Factor Authentication (TFA / 2FA)

The Single Sign-On Multi-Factor portal for web apps

A Security Framework for Python applications featuring Authorization (rbac permissions and roles), Authentication (2fa totp), Session Management and an extensive Audit Trail

Generate 2FA tokens compatible with Google Authenticator

The best React Native example for phone verification (an alternative to Twitter Digits).

Generating 2FA codes in your terminal

React Native wrapper for Android's SMS User Consent API, ready to use in React Native apps with minimum effort.

Nginx SSO middleware for protecting your internets.

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

Time-Based One-Time Password Code Generator

Apache two-factor (2FA) authentication with Google Authenticator based on Time-based One-Time Password (TOTP) or HMAC-based one-time password (HOTP) Algorithms.

Google Authenticator

Two-factor authentication tray app in macOS

🌲 LDAP Proxy to intercept LDAP binds and authenticate against privacyIDEA

Your easy 2FA companion that keep the secrets secret.