Authentik vs Open Authenticator

Comparing two open source alternatives to Microsoft Authenticator and Google Authenticator and Authy. Use the comparison below to decide which one fits your needs.

Authentik

MIT

Open source identity provider and SSO solution that replaces Auth0 and Okta with a self-hostable, flexible authentication platform.

Visit Full details

Open Authenticator

GPL-3.0

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

Visit Full details

Side-by-side comparison

	Authentik	Open Authenticator
License	MIT	GPL-3.0
Self-hostable	Yes	Yes
GitHub Stars	25,816	92
Forks	2,058	16
Open Issues	1,122	6
Last Commit	Oct 2, 2026	Aug 15, 2026
First Released	Dec 30, 2019	Mar 25, 2024
Categories	2FA Authentication Single Sign-On	2FA Authentication
Tags	#authentication #authorization #kubernetes #self hosted #sso	#2fa #authentication #cross-platform #totp

GitHub stars over time

Authentik25,816

Open Authenticator

Similar open source alternatives

Keycloak

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

Alternative to:

Auth0

Trezur

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

Alternative to:

Google Authenticator

2FAuth

Self-hosted web app to manage your Two-Factor Authentication (2FA) accounts and generate TOTP and HOTP codes from any browser.

Alternative to:

Authy

Tinyauth

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

Alternative to:

Auth0

OTPHub

Simple OTP app for desktop and mobile.

Alternative to:

Google Authenticator

Stack Auth

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

Alternative to:

Auth0