8 Best Auth0 Alternatives and Competitors in 2026

Auth0 provides authentication and authorization services that developers can use to add secure login experiences to web applications, mobile apps, and APIs. Its features include social login, multifactor authentication (MFA), passwordless authentication, single sign-on (SSO), and user management. Rather than building an identity system from scratch, development teams can use Auth0 to handle common authentication workflows and integrate them into their applications.

However, the right authentication platform depends on the product being built. A consumer application with thousands of sign-ins may have different requirements from a B2B SaaS platform that needs enterprise SSO, directory synchronization, and role-based access controls. Some teams also want to host their identity infrastructure themselves, while others prioritize managed authentication services and prebuilt user interfaces.

Pricing is another consideration. Auth0 offers a free plan, but paid plans, active-user limits, enterprise features, and additional requirements can affect the total cost. Teams should compare pricing using their expected monthly active users (MAUs), authentication methods, enterprise connections, and security requirements rather than relying only on the entry-level price.

The best Auth0 alternatives include Amazon Cognito, Microsoft Entra External ID, Firebase Authentication, Keycloak, FusionAuth, Clerk, Descope, and WorkOS. These platforms serve different use cases, from consumer login and developer-focused authentication to self-hosted identity infrastructure and enterprise-ready B2B authentication. Comparing their deployment options, customization, security features, and pricing model can help you find a platform that fits your application without adding unnecessary complexity.

Why Look for Auth0 Alternatives?

Auth0 supports a broad range of authentication use cases, but some teams may prefer a platform with a different pricing structure, deployment model, or development workflow.

• Authentication costs: Auth0 pricing depends on the selected plan and usage limits. Applications with growing user bases or specialized enterprise requirements should estimate costs against alternative pricing models.
• Enterprise SSO requirements: B2B SaaS companies may want predictable pricing for SAML SSO and directory synchronization as they add enterprise customers.
• Hosting and infrastructure control: Organizations with strict data residency, infrastructure, or deployment requirements may prefer a self-hosted option such as Keycloak or FusionAuth.
• Developer experience: Teams building with specific frameworks or cloud ecosystems may prefer authentication SDKs, APIs, and prebuilt components that fit their existing stack.
• Customization and control: Some applications require greater control over login flows, identity data, authentication policies, and the user experience.
• Security and operational requirements: Businesses should compare MFA, passwordless authentication, bot protection, risk-based controls, audit logging, and support options across the plans they are considering.

Auth0 Alternatives Comparison

The table below compares eight Auth0 alternatives by their primary use case, deployment approach, pricing, and G2 rating. Some are full customer identity platforms, while others focus on developer authentication or enterprise identity features.

Tool	Deployment	Best For	Pricing	G2 Rating
Amazon Cognito	SaaS	Applications built on AWS	Lite and Essentials: first 10,000 MAUs free; usage-based thereafter	N/A
Microsoft Entra External ID	SaaS	Customer and partner identity in Microsoft environments	Core offering free for first 50,000 MAUs; usage-based above the threshold	4.2/5
Firebase Authentication	SaaS	Web and mobile apps using Firebase and Google Cloud	No-cost usage allowances; phone authentication billed per SMS	4.9/5
Keycloak	Self-hosted	Teams needing open-source identity infrastructure	Free software; hosting and operations cost extra	N/A
FusionAuth	SaaS / self-hosted	Applications needing flexible customer identity	Community: free self-hosted; Starter from $162/month when billed annually	4.5/5
Clerk	SaaS	Modern web applications, particularly React and Next.js	Hobby: free; Pro: $20/month billed annually, with usage limits	N/A
Descope	SaaS	Visual authentication flows and passwordless login	Free tier available; paid costs depend on usage and plan	4.8/5
WorkOS	SaaS	B2B SaaS needing enterprise SSO and directory sync	AuthKit free up to 1 million users; SSO and Directory Sync priced per connection	4.5/5

Pricing is based on publicly available vendor information and can change. Amazon Cognito’s cost depends on its selected tier, MAU volume, and authentication method. G2 ratings are product-specific snapshots; N/A means an exact matching rating was not confirmed.

Top 8 Auth0 Alternatives in 2026

The following platforms offer different ways to implement authentication, manage customer identities, and support enterprise access requirements. Compare them against your application architecture, expected user volume, and security needs before choosing a replacement.

#1. Amazon Cognito

Amazon Cognito is an identity service for applications that need user registration, authentication, and account management within the AWS ecosystem. It supports username and password authentication, social identity providers, SAML and OIDC federation, and MFA. Developers can integrate Cognito with other AWS services to build authentication workflows without operating a complete identity platform themselves.

Cognito offers three user-pool tiers: Lite, Essentials, and Plus. Lite supports core authentication needs, Essentials adds capabilities such as managed login, passwordless authentication, and passkeys, while Plus includes additional security features such as risk-based adaptive authentication and compromised-credential detection. Essentials and Lite provide a free allowance for the first 10,000 monthly active users for direct or social sign-ins; additional usage is billed according to the applicable tier. Enterprise federation, SMS delivery, and machine-to-machine token requests can incur separate charges.

Cognito is worth considering for applications already hosted on AWS or built around services such as Lambda and API Gateway. It can also support large user populations through its usage-based pricing model. However, teams should account for AWS configuration, customization, monitoring, and integration work. It is important to estimate the complete cost of authentication, including SMS, federation, and security features, rather than comparing only the free allowance with Auth0.

Key Features

• User pools: Manage application users, registration, sign-in, account recovery, and user attributes.
• Social authentication: Let customers sign in through supported external identity providers.
• SAML and OIDC federation: Connect supported external identity providers to application authentication.
• Multifactor authentication: Add supported authentication factors to strengthen account security.
• Passwordless login: Essentials and Plus support passwordless options, including passkeys and one-time codes.
• Threat protection: Plus includes risk-based authentication and compromised-credential detection.
• AWS integration: Connect authentication workflows with compatible AWS services and application components.
• Machine-to-machine authorization: Support OAuth 2.0 client credentials flows for supported service-to-service use cases.

#2. Microsoft Entra External ID

Microsoft Entra External ID is Microsoft’s customer and partner identity platform. It helps organizations manage external users who access applications, customer portals, and digital services. Developers can integrate external identity authentication into applications while using Microsoft’s identity infrastructure and security capabilities.

Microsoft offers a core External ID service with a free allowance for the first 50,000 monthly active users. Beyond that threshold, usage is billed according to Microsoft’s applicable pricing, with additional charges possible for premium capabilities such as SMS authentication and identity governance. Because prices can depend on usage and regional billing details, organizations should estimate costs using their expected active users and required add-ons.

External ID is a relevant Auth0 alternative for businesses that already use Microsoft Azure or other Microsoft identity services. It can help teams consolidate customer and partner identity management within their existing cloud environment. However, developers should validate the available authentication flows, branding options, extensibility, SDKs, and migration requirements against their current Auth0 implementation before committing to a switch.

Key Features

• External identity management: Supports authentication for customers, partners, and other external users.
• Application authentication: Integrates customer identity into supported applications and services.
• Social identity providers: Supports federated authentication options for eligible application scenarios.
• Customizable sign-in experiences: Helps organizations build identity journeys that fit their applications.
• Microsoft ecosystem integration: Works within Microsoft’s identity and cloud environment.
• Usage-based pricing: Provides a free core allowance followed by charges based on active users and applicable features.
• External access controls: Helps manage authentication and access for users outside an organization’s workforce.
• Extensible identity workflows: Supports application integration and customization according to the available platform capabilities.

#3. Firebase Authentication

Firebase Authentication is a developer-focused authentication service for web and mobile applications. It provides SDKs, authentication APIs, and prebuilt interface components that help developers implement sign-up, sign-in, and account recovery. Supported methods include email and password, phone authentication, and federated sign-in through providers such as Google, Apple, and Facebook.

Firebase Authentication is especially useful for applications already using Firebase or Google Cloud. Its free usage allowances can make it attractive for smaller applications, while Identity Platform offers additional enterprise-oriented authentication capabilities. Pricing depends on the service and authentication method; phone authentication, for example, is billed according to SMS usage, and certain identity federation features have separate usage limits and charges.

Firebase Authentication is a practical choice for development teams that want to implement authentication quickly without managing identity infrastructure. However, organizations with complex B2B requirements should examine its enterprise SSO, tenancy, authorization, and administrative needs carefully. It may require additional services or custom application logic to match an Auth0 setup with advanced customer identity workflows.

Key Features

• Email and password authentication: Supports common account creation, sign-in, and recovery workflows.
• Federated login: Allows users to authenticate through supported social and external identity providers.
• Phone authentication: Supports phone-based verification with SMS usage charges where applicable.
• Developer SDKs: Provides libraries for integrating authentication into supported web and mobile platforms.
• Prebuilt UI components: Helps reduce the work needed to implement common sign-in screens.
• Firebase integration: Connects authentication with other Firebase application services.
• Identity Platform capabilities: Offers additional authentication functionality for supported enterprise requirements.
• Scalable authentication: Supports applications as their active user populations grow, subject to service quotas and pricing.

#4. Keycloak

Keycloak is an open-source identity and access management platform that organizations can host on their own infrastructure. It supports authentication, SSO, identity federation, and authorization for applications and services. Teams can use it to manage user identities and connect applications through standard protocols such as OpenID Connect, OAuth 2.0, and SAML.

Because Keycloak is open source, there is no software license fee for its core platform. Organizations remain responsible for infrastructure, deployment, upgrades, security configuration, backups, monitoring, and ongoing operations. This can be attractive to teams that want control over identity data and deployment architecture, but the real cost depends on the technical resources required to run the service reliably.

Keycloak is worth evaluating when self-hosting, extensibility, and control are more important than a fully managed authentication experience. It can be adapted to different identity architectures, but it generally requires more operational ownership than a managed service such as Auth0. Teams should assess their capacity to maintain the deployment, support custom login flows, and handle security updates before choosing it for production authentication.

Key Features

• Open-source identity platform: Provides core identity and access management capabilities without a commercial software license.
• Single sign-on: Allows users to authenticate once and access supported applications.
• OpenID Connect and OAuth 2.0: Supports standard protocols for application authentication and authorization.
• SAML support: Connects applications and identity providers that use SAML federation.
• Identity federation: Integrates with supported external identity providers and user directories.
• Custom authentication flows: Lets administrators configure authentication steps and policies.
• Role-based authorization: Supports roles and permissions for application access.
• Self-hosted deployment: Gives organizations control over hosting, infrastructure, and identity data.

#5. FusionAuth

FusionAuth is a customer identity and access management platform designed for applications that need authentication, authorization, and user management. It provides APIs and developer tools for integrating login experiences into applications, while supporting different deployment models. Organizations can use its self-hosted Community edition or evaluate paid plans for additional capabilities and managed hosting.

FusionAuth’s Community edition is free for self-hosted deployments. Its official pricing page lists the Starter plan from $162 per month when billed annually, with higher-tier plans designed for more advanced business requirements and support. The right plan depends on the features required, deployment choice, and operational needs. Teams should compare these costs with Auth0’s plan limits and the cost of running a self-hosted identity service.

FusionAuth is worth considering when a team wants more control over its identity architecture or needs flexibility across hosted and self-hosted deployments. It supports customer identity use cases, multi-tenant applications, and machine-to-machine authentication scenarios. However, advanced configurations can take time to implement, and organizations should test theme customization, migration tooling, authentication flows, and the features included in each paid plan.

Key Features

• Customer identity management: Supports user registration, authentication, and account management for applications.
• Authentication APIs: Provides APIs for integrating identity functions into existing software.
• Self-hosted deployment: Allows teams to operate the platform on their own infrastructure with the Community edition.
• Managed hosting options: Offers paid plans with hosting and additional features.
• Multifactor authentication: Supports MFA capabilities, with advanced features depending on the selected plan.
• Machine-to-machine authentication: Supports service-to-service authentication scenarios.
• Multi-tenant support: Helps applications manage separate customer or tenant identity environments.
• Application customization: Provides tools to customize authentication experiences and integrate identity into product workflows.

#6. Clerk

Clerk is a developer-focused authentication and user management platform designed for modern web applications. It provides prebuilt sign-up and sign-in interfaces, user profile components, APIs, and SDKs that help teams implement identity features without building every authentication screen and workflow themselves. It is particularly relevant to applications built with React and Next.js.

Clerk offers a free Hobby plan and a Pro plan listed at $20 per month when billed annually. The Hobby plan includes up to 50,000 monthly retained users per application, subject to the plan’s limits. Pro includes the same initial allowance, with additional charges for usage beyond included limits and separate pricing for additional enterprise SSO or directory synchronization connections. Teams should check current plan details and how Clerk defines billable users before estimating production costs.

Clerk can be a good fit when developer experience and ready-made authentication components are priorities. Its approach can reduce the effort involved in building common account experiences, but applications with specialized enterprise requirements should check the availability and cost of SSO, directory sync, and advanced controls. Teams should also validate whether Clerk’s supported frameworks and customization options align with their application architecture.

Key Features

• Prebuilt sign-in and sign-up: Provides ready-made UI components for common authentication journeys.
• User management: Offers interfaces and APIs for managing application users and profiles.
• Developer SDKs: Supports integration with modern web frameworks and application stacks.
• Session management: Helps manage user sessions and authentication state.
• Social login: Supports federated sign-in through available identity providers.
• Machine authentication: Provides API keys and machine-to-machine token capabilities, subject to plan limits.
• Enterprise SSO: Supports SSO connections through eligible plans and add-ons.
• Directory synchronization: Offers directory sync capabilities with plan-specific connection pricing.

#7. Descope

Descope is a customer identity platform that helps development teams build authentication and authorization workflows using visual tools and APIs. It supports login experiences such as passwordless authentication, MFA, federated SSO, and user management. Its visual workflow approach is designed to let developers and product teams configure authentication journeys without implementing every step manually.

Descope offers a free tier, with usage limits and paid options depending on the product and plan. Its platform includes tools for customer authentication, multi-tenant use cases, and enterprise access workflows. Because the cost of a production implementation depends on usage and the features selected, teams should verify the current plan limits and obtain pricing for the required authentication volume, SSO connections, and support needs.

Descope is worth evaluating when an organization wants to configure and iterate on authentication journeys without relying entirely on custom code. It can be particularly relevant to applications that need passwordless login, B2B authentication, or multiple authentication paths. Before migrating from Auth0, teams should test the mapping between visual flows and standard identity protocols, verify SDK maturity for their language stack, and confirm that audit logging and required integrations meet operational needs.

Key Features

• Visual authentication flows: Lets teams configure authentication journeys using a visual workflow interface.
• Passwordless authentication: Supports passwordless sign-in methods for eligible use cases.
• Multifactor authentication: Adds authentication steps to help strengthen account security.
• Federated SSO: Supports SSO integrations for enterprise customer environments.
• Multi-tenant identity: Helps applications manage identities across multiple customer organizations.
• Authorization workflows: Supports identity-related access rules and workflows.
• Integration connectors: Connects authentication workflows with supported external services.
• Developer APIs and SDKs: Provides integration options for embedding authentication into applications.

#8. WorkOS

WorkOS provides developer APIs for adding enterprise identity features to B2B SaaS applications. It is especially relevant to software companies whose customers require enterprise SSO, directory synchronization, user provisioning, and centralized access administration. Rather than replacing every part of an application stack, WorkOS lets development teams add identity capabilities through dedicated APIs and components.

WorkOS offers AuthKit user management free for up to one million monthly active users. Enterprise SSO and Directory Sync are priced per connection, with the first 15 connections listed at $125 each per month for each relevant feature. Volume discounts apply at higher connection counts. This model can be attractive for B2B SaaS businesses that need enterprise identity features, although the total cost depends on the number of customer connections and the products used.

WorkOS is a strong option when the main reason for leaving Auth0 is to add enterprise SSO and directory synchronization with a connection-based pricing model. It can help teams implement these features without building every enterprise identity integration themselves. However, businesses should distinguish between WorkOS’s user authentication features and its separately priced enterprise capabilities, then verify whether the full set of authentication, authorization, and user management functions they need is covered.

Key Features

• AuthKit user management: Provides authentication and user management capabilities for applications.
• Enterprise SSO: Supports SAML and OIDC integrations for enterprise customers.
• Directory Sync: Helps synchronize users and groups from supported enterprise directories.
• User provisioning: Supports workflows for provisioning, deprovisioning, and role mapping.
• Social authentication: Supports sign-in through supported social identity providers.
• Multifactor authentication: Provides MFA capabilities for supported authentication workflows.
• Role-based access control: Helps applications manage permissions for users and organizations.
• Connection-based pricing: Prices enterprise SSO and directory synchronization by connection, with volume discounts.

How to Choose Auth0 Alternatives

Start by identifying the authentication features your application actually uses. Amazon Cognito and Firebase Authentication are relevant for cloud-native applications, while Microsoft Entra External ID fits teams that want customer identity in Microsoft’s ecosystem. Keycloak and FusionAuth are worth evaluating when deployment control matters. Clerk and Descope emphasize developer experience and configurable authentication journeys, while WorkOS is especially relevant for B2B SaaS companies adding enterprise SSO and directory synchronization.

Use the following criteria to narrow your shortlist:

• Map your existing authentication flows: Document sign-up, login, password reset, MFA, social login, federation, logout, and account recovery before comparing platforms.
• Estimate active-user costs: Calculate expected MAUs, authentication method usage, SMS volume, enterprise connections, and any add-on charges.
• Review enterprise identity requirements: If your customers need SAML SSO, SCIM, or directory synchronization, confirm availability and pricing at the required scale.
• Assess deployment preferences: Decide whether a managed SaaS service or self-hosted identity infrastructure better fits your security, compliance, and operations requirements.
• Check developer support: Evaluate SDKs, API documentation, supported frameworks, testing environments, and migration tools.
• Compare security capabilities: Review MFA, passwordless options, passkeys, compromised-credential detection, rate limiting, bot protection, and audit logging.
• Test customization: Make sure you can customize branding, login pages, authentication steps, user attributes, and authorization rules as required.
• Plan for migration: Test identity data migration, password handling, account linking, session invalidation, and fallback access before switching production users.
• Verify support and service commitments: Check documentation, technical support, service-level agreements, and incident communication for the selected plan.

Conclusion

Auth0 alternatives vary considerably in their approach to customer identity. Some prioritize managed authentication for applications, while others offer greater infrastructure control or specialize in enterprise SSO and directory synchronization. The best option depends on the authentication workflows your product needs and the level of identity management your team wants to operate.

Amazon Cognito is relevant for AWS-based applications, while Firebase Authentication suits teams using Firebase and Google Cloud. Microsoft Entra External ID is worth considering in Microsoft-centric environments. Keycloak and FusionAuth offer deployment flexibility, Clerk focuses on developer-friendly components, Descope provides configurable authentication workflows, and WorkOS is particularly useful for B2B SaaS companies adding enterprise identity features.

Pricing should be evaluated against expected usage and required capabilities rather than the lowest advertised starting price. MAU allowances, SMS delivery, SSO connections, directory synchronization, hosting, and support can all affect total cost. Self-hosted products may reduce licensing costs but require engineering time for deployment, maintenance, and security operations.

Before choosing a replacement, run a proof of concept using the same authentication flows, identity providers, and application integrations as your current Auth0 deployment. Validate migration behavior and test the user experience under realistic conditions. This will help you choose a platform that meets your technical and commercial requirements without introducing unnecessary complexity.

FAQs

1. What are the best Auth0 alternatives in 2026?

The Best Auth0 alternatives are Amazon Cognito, Microsoft Entra External ID, Firebase Authentication, Keycloak, FusionAuth, Clerk, Descope, and WorkOS are options to evaluate. Each serves a different use case, so the best choice depends on application architecture, authentication requirements, deployment preferences, and pricing.

2. Is Amazon Cognito cheaper than Auth0?

Amazon Cognito can be cost-effective for applications with suitable usage patterns, particularly those already using AWS. Lite and Essentials offer a free allowance for the first 10,000 monthly active users for direct or social sign-ins, followed by usage-based charges. Compare the applicable tier, federation, SMS, and security costs with the Auth0 plan you need.

3. Is Firebase Authentication a good alternative to Auth0?

Firebase Authentication is a useful alternative for web and mobile applications that need common authentication methods and developer SDKs. It is particularly convenient for Firebase-based projects. Applications requiring more complex B2B SSO or customer identity governance should evaluate the additional services or custom development required.

4. Is Keycloak a free alternative to Auth0?

Keycloak is open-source software that can be self-hosted without a commercial software license fee. However, infrastructure, monitoring, upgrades, backups, and security operations still cost money. It may reduce licensing costs but requires technical resources to operate and maintain.

5. What is the difference between Auth0 and FusionAuth?

Both support customer identity and authentication workflows. FusionAuth offers a self-hosted Community edition and paid options, giving teams deployment flexibility. Auth0 is a managed platform with tier-based pricing and a broad range of authentication features. Compare deployment, customization, enterprise requirements, and operational costs.

6. Is Clerk suitable for enterprise applications?

Clerk can support applications that need user management and authentication components, with enterprise SSO and directory sync available under plan-specific terms. Organizations should verify the connection limits, customization options, security controls, and total cost for their expected enterprise customer base.

7. How does Descope compare with Auth0?

Descope emphasizes visual authentication workflows alongside APIs and SDKs. Auth0 provides a broad authentication platform with configurable identity features. Teams should compare workflow customization, SDK support, enterprise SSO, audit logging, migration effort, and the costs associated with their required usage.

8. Is WorkOS an Auth0 replacement?

WorkOS can replace or supplement parts of an Auth0 implementation, particularly where a B2B SaaS product needs enterprise SSO and directory synchronization. Its fit depends on whether its authentication and user management features cover the full application requirements or whether additional identity components are needed.

9. What is the difference between customer identity and workforce identity?

Customer identity focuses on customers or external users who access an application or service. Workforce identity manages employees and contractors accessing business applications and internal resources. Auth0 primarily serves customer identity use cases, although identity products can overlap across customer, partner, and workforce scenarios.

10. Which Auth0 alternative is best for self-hosting?

Keycloak and FusionAuth’s Community edition are relevant options for teams that want to host identity infrastructure themselves. Compare supported authentication features, deployment architecture, customization, maintenance requirements, and the capabilities available in free versus paid editions.

11. Can I migrate users from Auth0 to another identity provider?

Yes, but the process depends on the target platform and how the existing user data and credentials are stored. Teams should plan for profile migration, password compatibility, account linking, identity provider configuration, and session handling. Some migrations may require password resets or a staged migration process.

12. Does Auth0 support passwordless authentication?

Yes. Auth0 offers passwordless authentication capabilities, including supported email and SMS login methods. Some features and usage limits depend on the plan. Compare the exact passwordless methods, passkey support, MFA requirements, and pricing with the alternative you are evaluating.

13. How is Microsoft Entra External ID different from Microsoft Entra ID?

Microsoft Entra External ID is designed for external identities, including customers and partners accessing applications. Microsoft Entra ID primarily serves workforce identity and access management. Organizations should select the product that matches the identity population and application requirements they need to manage.

14. What should I compare when evaluating Auth0 pricing?

Compare monthly active users, plan limits, enterprise SSO connections, directory synchronization, MFA, SMS delivery, support, security add-ons, and any machine-to-machine usage charges. For self-hosted options, also include infrastructure and engineering time in the total cost.

15. Which Auth0 alternative is best for B2B SaaS?

WorkOS, Descope, FusionAuth, and Microsoft Entra External ID are worth evaluating for different B2B identity needs. WorkOS is particularly relevant for enterprise SSO and directory sync, while the others offer different combinations of customer identity, authentication workflows, and deployment choices.

16. How do I choose the right Auth0 competitor?

Start with the features your application uses today, then compare authentication methods, enterprise identity requirements, SDK support, customization, deployment options, security controls, and pricing at your expected usage. Test a representative set of user flows and migration scenarios before moving production identities.