7 Best Alternatives to Auth0 in 2026 for Identity Management

Why look beyond Auth0

Auth0, acquired by Okta in 2021, provides a comprehensive suite of identity management services, including Universal Login, Multi-Factor Authentication (MFA), and API Authorization [Auth0 API Reference]. It is widely used for securing customer-facing applications and streamlining user authentication workflows. Despite its capabilities, developers and technical buyers may consider alternatives for several reasons.

One common factor is cost, as Auth0's pricing scales with Monthly Active Users (MAU), which can become substantial for applications with a large user base or unpredictable growth. Some organizations may seek more granular control over their identity infrastructure, preferring self-hosted or open-source solutions that allow for deeper customization and integration with existing systems. Additionally, specific cloud providers offer native identity services, such as AWS Cognito or Firebase Authentication, which can provide tighter integration and potentially lower latency for applications already hosted within those ecosystems. Finally, some alternatives may offer a simpler developer experience for particular use cases or specialized features not central to Auth0's core offering.

Top alternatives ranked

1. 1. Keycloak — Open-source identity and access management for modern applications

   Keycloak is an open-source identity and access management solution that provides authentication and authorization services for applications and APIs [Keycloak Documentation]. It supports standard protocols like OpenID Connect, OAuth 2.0, and SAML 2.0. Keycloak offers features such as single sign-on (SSO), multi-factor authentication (MFA), user federation, and social login. It can be self-hosted, giving organizations full control over their identity infrastructure and data. Keycloak also includes an administrative console for managing users, roles, and clients, and it supports custom themes and extensions. Its flexibility makes it suitable for environments requiring deep customization or adherence to specific data sovereignty requirements.

   Best for: Organizations seeking an open-source, self-hostable IAM solution with extensive customization options and standard protocol support.

   Learn more about Keycloak

2. 2. AWS Cognito — Scalable user directory and authentication for AWS applications

   AWS Cognito is a fully managed identity service provided by Amazon Web Services, designed to add user sign-up, sign-in, and access control to web and mobile applications [AWS Cognito Developer Guide]. It consists of two main components: User Pools, which provide a secure user directory, and Identity Pools, which enable granting users access to other AWS services. Cognito supports social identity providers like Google, Facebook, and Apple, as well as enterprise identity providers via SAML. It integrates seamlessly with other AWS services such as Lambda, API Gateway, and S3, making it a strong choice for applications built within the AWS ecosystem. Cognito handles user authentication, authorization, and management at scale, abstracting away much of the underlying infrastructure.

   Best for: Developers building applications on AWS who require a scalable, integrated, and managed authentication and authorization service.

   Learn more about AWS Cognito

3. 3. Firebase Authentication — Backend authentication services for Google Cloud users

   Firebase Authentication provides backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your app [Firebase Authentication Documentation]. It supports authentication using passwords, phone numbers, popular federated identity providers like Google, Facebook, and Twitter, and more. Firebase Authentication integrates directly with other Firebase services and Google Cloud Platform, offering a streamlined experience for developers already using the Google ecosystem. It handles the complexities of user identity and provides a secure, scalable solution without requiring server-side code for many common authentication flows. The service is part of the broader Firebase platform, which includes databases, hosting, and analytics.

   Best for: Developers building web or mobile applications within the Firebase/Google Cloud ecosystem who prioritize ease of implementation and a managed backend solution.

   Learn more about Firebase Authentication

4. 4. Supabase Auth — Open-source authentication and user management for PostgreSQL databases

   Supabase Auth is an open-source authentication system built on top of PostgreSQL, offering user management, row-level security, and integrations with various third-party providers [Supabase Auth Documentation]. It provides a set of APIs and client libraries that simplify user sign-up, sign-in, password resets, and email verification. Supabase Auth is part of the larger Supabase platform, which aims to be an open-source alternative to Firebase, offering a PostgreSQL database, real-time subscriptions, and storage. Its focus on PostgreSQL and open standards allows for flexibility and control, especially for developers who prefer SQL-centric data management and want to own their data.

   Best for: Developers using PostgreSQL and seeking an open-source, integrated authentication solution that provides granular control over user data and security policies.

   Learn more about Supabase Auth

5. 5. Microsoft Azure AD B2C — Customer identity access management for Azure-centric environments

   Microsoft Azure Active Directory B2C (Azure AD B2C) is a customer identity access management (CIAM) service that enables businesses to customize and control how customers sign up, sign in, and manage their profiles when using applications [Azure AD B2C Documentation]. It supports millions of users and billions of authentications per day, integrating with various identity providers, including social accounts and enterprise SAML/OpenID Connect providers. Azure AD B2C offers custom user journeys, multi-factor authentication, and conditional access policies. It is particularly well-suited for organizations with existing investments in Microsoft Azure or those building applications that require deep integration with the Microsoft ecosystem.

   Best for: Enterprises and developers building customer-facing applications within the Microsoft Azure ecosystem, requiring scalable CIAM with extensive customization and compliance features.

   Learn more about Azure AD B2C

6. 6. DigitalOcean App Platform Auth — Simplified authentication for applications hosted on DigitalOcean

   DigitalOcean App Platform provides built-in authentication features that simplify user management for applications deployed on its platform [DigitalOcean App Platform Authentication]. While not a standalone IAM provider in the same vein as Auth0 or Keycloak, it offers tools and integrations to secure web applications, APIs, and mobile backends. This includes environment variable management for API keys, secure deployment practices, and integration with third-party authentication services. For developers primarily hosting their applications on DigitalOcean, leveraging the platform's native capabilities can streamline deployment and operational overhead related to authentication. It aims to provide a developer-friendly experience for common app development needs.

   Best for: Developers hosting applications on DigitalOcean's App Platform who seek simplified authentication setup and integrated deployment workflows.

   Learn more about DigitalOcean App Platform

7. 7. Render Auth — Integrated authentication features for Render-deployed services

   Render offers integrated authentication capabilities for services deployed on its platform, focusing on ease of use and developer experience [Render Web Services Authentication]. Similar to DigitalOcean App Platform, Render provides tools and best practices to secure web applications and APIs, including environment variable management for sensitive credentials and secure deployment pipelines. While Render does not provide a full-fledged identity provider like Auth0, it facilitates the integration of third-party authentication services and supports common secure practices for applications. Its managed hosting environment aims to reduce operational complexity, allowing developers to focus on application logic rather than infrastructure for authentication.

   Best for: Developers deploying applications on Render who benefit from integrated deployment and simplified security configurations for authentication.

   Learn more about Render

Side-by-side

How to pick

Selecting the right identity and access management solution depends on several factors, including your existing technology stack, budget, required level of customization, and operational preferences.

• For deep customization and self-hosting: If your organization requires full control over the identity infrastructure, needs to comply with specific data sovereignty regulations, or has a strong preference for open-source solutions, Keycloak is a strong candidate. It offers extensive flexibility to tailor authentication flows and integrates with various enterprise systems. Keep in mind that self-hosting Keycloak requires managing its underlying infrastructure, including databases and servers.
• For AWS-centric applications: If your application is already heavily invested in the Amazon Web Services ecosystem, AWS Cognito provides seamless integration with other AWS services like Lambda and API Gateway. It's a fully managed service, reducing operational overhead, and scales automatically to handle a large number of users.
• For Firebase/Google Cloud projects: For developers building web or mobile applications within the Google Cloud Platform or Firebase ecosystem, Firebase Authentication offers a straightforward and well-integrated solution. Its client-side SDKs and ready-made UI components can accelerate development, and it handles much of the backend complexity.
• For PostgreSQL users and open-source preference: If your backend is built around PostgreSQL and you appreciate an open-source approach to your stack, Supabase Auth presents a compelling option. It offers a robust authentication system that leverages PostgreSQL's capabilities, including Row Level Security, giving you fine-grained control over data access.
• For large enterprises with Azure investments: Organizations with significant existing infrastructure and applications on Microsoft Azure will find Azure AD B2C to be a powerful and scalable CIAM solution. It integrates deeply with the Azure ecosystem and offers advanced features for managing customer identities at scale, including custom user journeys and compliance capabilities.
• For simplified platform-level authentication: If your primary concern is quickly securing applications deployed on specific platforms, and you're comfortable with integrating third-party authentication providers, DigitalOcean App Platform Auth or Render Auth can streamline the process. These options focus on providing a secure deployment environment and facilitating the integration of identity services rather than being full-fledged IAM providers themselves. They are best suited when the hosting platform is a primary consideration.

Consider your team's expertise, the scale of your application, and your long-term identity management strategy when making a decision. Evaluate the total cost of ownership, including licensing, infrastructure, and maintenance, for each alternative.