Okta is an identity management service that helps companies manage and secure user authentication into modern applications.
Custom pricing based on requirements
Best Microsoft Entra External ID Alternatives ranked by AI · updated Aug 2026
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Microsoft Entra External ID is Microsoft's managed identity service for customer and partner applications. It provides branded sign-in, social and enterprise federation, MFA, conditional access, and standards-based application integration.
Developer: Microsoft
Price: Free tier; paid per monthly active user
🎯 microsoft.com/en-us/security/business/identity-access/microsoft-entra-external-id
Top 6 Microsoft Entra External ID alternatives
FusionAuth is a complete identity and access management tool that provides authentication, authorization, and user management for any app.
Free for unlimited users, with paid support options
Keycloak is an open-source Identity and Access Management solution aimed at modern applications and services.
Free and open-source
ForgeRock is an enterprise identity platform for customer, workforce, and IoT identities. It offers identity orchestration, authentication, authorization, lifecycle management, and directory...
Pros
- Broad identity capabilities for large and complex deployments
- Strong orchestration and journey customization
- Supports customer, workforce, and device identity scenarios
Cons
- More expensive and complex to deploy than TrustBuilder
- Requires substantial identity engineering expertise
- Longer implementation timelines than Auth0 or Entra External ID
Contact for pricing
TrustBuilder is an enterprise identity and access management platform for customer, partner, and workforce identities. It provides federation, adaptive authentication, multi-factor authentication,...
Pros
- Supports customer, partner, and workforce identity use cases in one platform
- Strong federation and multi-factor authentication capabilities
- Suited to complex B2B2C access relationships
Cons
- Less transparent pricing than Auth0 or Keycloak
- Smaller developer ecosystem than Okta and Microsoft Entra
- More implementation effort than developer-focused CIAM services
Contact for pricing
IdentityServer is an extensible OpenID Connect and OAuth 2.0 framework for .NET applications, used by teams building their own identity and access...
Pros
- Deep integration with ASP.NET Core and the .NET ecosystem
- Highly customizable token, claims, and authentication pipelines
- Supports OAuth 2.0, OpenID Connect, and federation scenarios
Cons
- Requires substantially more identity expertise than Auth0 or Okta
- Commercial licensing is more complex than fully open-source alternatives
- More implementation and operational work than a managed identity service
Free Community Edition; commercial licenses from $1,500/year
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