9 Auth0 Alternatives and Competitors

A curated list of the best free, open source alternatives and competitors to Auth0, ranked based on category revelancy & feature completeness.

# Open-source Alternatives

Open-source alternatives offer extensive customization through public code access. Most of them provide free / paid cloud service. Some might require self-hosting to use.

Authelia

Authelia
Open-source

#1

A flexible platform providing single sign-on and multi-factor authentication to enhance security for web applications

Authelia

Authelia is a robust open-source authentication and authorization server designed for identity and access management (IAM). It provides single sign-on (SSO) capabilities and multi-factor authentication (MFA) for secure access to applications, all while integrating seamlessly with common reverse proxies.

Authelia is best used for
  1. Enterprise Security: Centralized IAM for business applications.
  2. Web Applications: Secure user access management for online services.
  3. Customizable Authentication Solutions: Tailored IAM for developers and IT teams.
Authentik

Authentik
Open-source

#2

A flexible platform for centralized access management, supporting SSO, MFA, and various authentication protocols

Authentik

Authentik is a powerful identity provider (IdP) and single sign-on (SSO) platform designed to provide secure, centralized access management across environments. It supports multiple authentication standards, including OAuth2, SAML, LDAP, and SCIM, allowing it to integrate seamlessly with various applications. With a user-friendly admin interface, Authentik simplifies user, group, and application management.

Authentik is best used for
  1. Centralized Authentication: Ideal for managing user access across applications with single sign-on.
  2. Enterprise Security: Suitable for businesses needing robust authentication and MFA to protect data.
  3. Customizable Access Control: Perfect for organizations requiring tailored login and access flows.
Keycloak

Keycloak
Open-source

#3

A flexible solution for secure single sign-on (SSO) and user authentication, ideal for web applicationsPostgreSQL database, authentication, and real-time capabilities

Keycloak

Keycloak is an open-source identity management platform that enables secure authentication, SSO, and role-based access control (RBAC) across multiple applications. With support for social logins, multi-factor authentication, and customizable login flows, Keycloak centralizes user management, making it easy to secure access without relying on third-party services.

Keycloak is best used for
  1. Enterprise SSO Implementations: Securely manage logins across corporate apps.
  2. Flexible Access Control: Customize permissions for users and roles.
  3. Self-Hosted IAM Solutions: Organizations needing in-house identity management.
Ory

Ory
Open-source

#4

Empower your applications with flexible and secure authentication, authorization, and user management, tailored to meet your organization’s needs.

Ory

Ory provides a modern, modular identity and access management (IAM) solution designed for flexibility and scalability. It enables seamless integration with various applications through Single Sign-On (SSO), social logins, and passwordless authentication, all while offering customizable user interfaces and workflows.

Ory is best used for
  1. Enterprise IAM: Central management of user identities and access.
  2. Consumer Applications: Secure user authentication for customer-facing services.
  3. Developer-Focused Solutions: Build tailored identity systems using APIs.
Supertokens

Supertokens
Open-source

#5

A open-source platform enabling secure user authentication and authorization with customizable options for any web or mobile application

Supertokens

SuperTokens provides an open-source, self-hosted authentication solution focused on simplicity and scalability. It supports common authentication methods, including passwordless login, social login, and single sign-on (SSO), and integrates easily with existing applications. Designed to prevent vulnerabilities, SuperTokens offers comprehensive attack protection and ensures secure user access.

Supertokens is best used for
  1. Custom Application Authentication: Tailored login for unique requirements.
  2. Mobile and Web Apps: Adaptable login options across devices.
  3. Enterprise Access Control: Centralized login management for internal apps.
Hanko

Hanko
Open-source

#6

A versatile solution enabling developers to implement secure, passwordless authentication using passkeys, alongside support for email passcodes and optional passwords

Hanko

Hanko is an open-source authentication and user management system that emphasizes modern, secure login methods. It facilitates the integration of passkeys—an advanced, passwordless authentication technology—into applications, enhancing both security and user experience. Additionally, Hanko supports email passcodes and offers optional password integration, catering to diverse security requirements.

Hanko is best used for
  1. Modern Web Applications: Ideal for applications seeking to implement cutting-edge authentication methods.
  2. Mobile Applications: Enhances mobile user experience with seamless biometric authentication.
  3. Enterprise Solutions: Offers scalable authentication for organizations aiming to adopt passwordless security.
Zitadel

Zitadel
Open-source

#7

A customizable identity infrastructure designed to streamline authentication and authorization for applications of any size

Zitadel

Zitadel is a powerful identity management platform that simplifies authentication and authorization processes across applications. It supports various modern authentication methods, including Single Sign-On (SSO), social logins, and passwordless authentication, while offering a customizable hosted login page and robust APIs for seamless integration.

Zitadel is best used for
  1. Enterprise Authentication: Centralized access management for businesses.
  2. Consumer Applications: Secure user authentication for customer-facing services.
  3. Developer-Centric Solutions: Customizable identity solutions for developers.
Supabase

Supabase
Open-source

#8

A developer-friendly platform that provides a suite of open-source tools for backend development, including PostgreSQL database, authentication, and real-time capabilities

Supabase

Supabase is an open-source backend-as-a-service (BaaS) that empowers developers with a PostgreSQL database, real-time data sync, and authentication out of the box. It offers SQL-based storage, allowing developers to use familiar SQL commands while benefiting from Supabase’s real-time API, enabling seamless updates across clients. With its authentication service, Supabase supports multiple authentication providers, making it simple to implement secure user management for web and mobile applications.

Supabase is best used for
  1. SQL-Based Projects: Ideal for projects requiring relational database structure.
  2. Real-Time Applications: Build collaborative apps, chats, and live data dashboards.
  3. Open-Source Development: Suitable for developers preferring open-source solutions.

# Closed-source Alternatives

If you are looking for more features or an enterprise solution, you might want to consider closed source alternatives. Some of them has decent free tier.

Firebase

Firebase
Freemium

#1

A robust BaaS platform that offers a suite of tools and infrastructure for building, testing, and scaling applications

Firebase

Firebase is a cloud-based platform by Google that supports app developers with powerful tools to manage the backend of their applications without needing extensive infrastructure. Its features include a real-time database, user authentication, and cloud storage, providing a scalable solution for data management, file storage, and user management. With integrated analytics and performance monitoring, Firebase gives developers valuable insights into user behavior, helping them improve app performance and engagement.

Firebase is best used for
  1. Mobile & Web App Backend: Simplify backend management for mobile and web apps.
  2. User Authentication: Quickly implement secure user login across apps.
  3. Real-Time Collaboration Apps: Create chat, gaming, or collaborative tools with real-time updates.
Auth0

Auth0
Freemium

A comprehensive authentication and authorization platform for secure app access

Muhammad Syakirurohman Made by
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