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
Best Microsoft Entra External ID Alternatives ranked by AI · updated Aug 2026
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
Keycloak is an open-source Identity and Access Management solution aimed at modern applications and services.
Free and open-source
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
ZITADEL is an open-source identity and access management platform for developers building customer-facing and workforce applications. It provides OAuth 2.0, OpenID Connect,...
Pros
- Open-source core with hosted and self-managed deployment options
- Strong multi-tenancy and organization features for B2B SaaS
- Supports OAuth, OIDC, SAML, passkeys, and passwordless authentication
Cons
- Smaller ecosystem and community than Auth0, Okta, or Keycloak
- Some advanced enterprise capabilities require higher-tier plans
- Less turnkey UI customization than developer-focused services such as Clerk
Free tier; paid plans from $100/mo
5
Auth0 provides a comprehensive platform for authentication and authorization.
Pros
- Customizable authentication flows
- Scalability
- Advanced security features
Cons
- Complex setup for some use cases
- Higher learning curve
Free tier available. Paid plans start at $23/month.
6
Okta Customer Identity Cloud is a managed customer identity and access management service for consumer and business applications. It supports branded login,...
Pros
- Stronger enterprise governance and security controls than typical developer IAM tools
- Handles high-volume customer identity workloads without self-hosted operations
- Supports complex federation, MFA, and account lifecycle requirements
Cons
- Usually more expensive and contract-oriented than IdentityServer
- Configuration can be less flexible than custom .NET code
- Product packaging and terminology can be difficult to navigate
Free tier up to 10,000 MAU; paid pricing varies
How good are these alternatives?
Your feedback helps us improve the AI rankings.
✅ Thanks for your feedback!
Know a better alternative? 🙌
Suggest a product and our AI will verify it's a real alternative to Microsoft Entra External ID before adding it to the list.