Keycloak is an open-source Identity and Access Management solution aimed at modern applications and services.
Free and open-source
Best Sustainsys.Saml2 Alternatives ranked by AI · updated Aug 2026
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Sustainsys.Saml2 is an open-source .NET library for integrating SAML 2.0 service-provider authentication into web applications. It is used with ASP.NET and ASP.NET Core and handles metadata, claims, certificates, and identity-provider configuration.
Top 6 Sustainsys.Saml2 alternatives
ASP.NET SAML is an SSO integration plugin for ASP.NET applications that connects service providers and identity providers using SAML 2.0. It provides...
Pros
- Provides a guided integration flow for ASP.NET SAML deployments
- Supports metadata import, attribute mapping, and configurable login flows
- Works with many enterprise identity providers without building protocol handling from scratch
Cons
- Less flexible than a lower-level SAML library for custom authentication architectures
- Commercial licensing can be harder to evaluate than open-source alternatives
- Adds a vendor-specific dependency to the application
3
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.
4
Microsoft Entra ID
Microsoft
Microsoft Entra ID is a cloud identity and access management service for organizations using Microsoft 365, Azure, and third-party applications. It provides...
Pros
- Deeper Microsoft 365 and Azure integration than Pointel
- Strong conditional access and multifactor authentication controls
- Broad enterprise application and device-management integrations
Cons
- Advanced governance features require higher-tier licensing
- More complex to administer than smaller IAM services
- Best value usually requires an existing Microsoft ecosystem
Free tier; paid plans from $6/user/mo
5
SAML for ASP.NET
ComponentSpace
SAML for ASP.NET is a commercial .NET toolkit for adding SAML 2.0 service-provider and identity-provider capabilities to ASP.NET applications. It includes APIs...
Pros
- Broader SAML protocol coverage than the miniOrange plugin
- Supports both service-provider and identity-provider scenarios
- Mature commercial support for enterprise .NET deployments
Cons
- Higher licensing cost than open-source .NET libraries
- Requires more development work than a purely guided plugin
- Can be excessive for a single basic SSO connection
6
ITfoxtec Identity SAML 2.0
ITfoxtec
ITfoxtec Identity SAML 2.0 is an open-source .NET library for implementing SAML 2.0 service-provider authentication. It targets ASP.NET Core and .NET applications...
Pros
- No license fee, unlike the miniOrange plugin
- Provides direct API-level control over SAML behavior
- Strong fit for modern ASP.NET Core and .NET applications
Cons
- Requires more SAML expertise and coding than a configuration-led plugin
- Less suitable for teams that need a commercial visual administration layer
- Integration examples focus more on ASP.NET Core than older ASP.NET Framework applications
Free, open source
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