TL;DR: Choosing an authentication provider for .NET apps changes how teams deliver SSO, SCIM, multi-tenancy, and claims-based authorization, according to WorkOS’s comparison of five approaches. The decision is not just about login flows; it determines how much identity governance you can inherit versus build yourself.
NHIMG editorial — based on content published by WorkOS: Top 5 authentication solutions for secure .NET apps in 2026
Questions worth separating out
A: Choose based on future identity governance requirements, not just current login needs.
Q: Why do basic authentication frameworks fall short for B2B SaaS identity needs?
A: Basic frameworks usually solve user login and password management, but enterprise customers expect federation, directory sync, lifecycle automation, and administrative control.
Q: What should IAM teams look for in claims-based authorization for .NET apps?
A: Look for tight claim scoping, clear tenant boundaries, and predictable token revocation.
Practitioner guidance
- Map enterprise identity requirements first List SSO, SCIM, audit logging, tenant isolation, and delegated administration before comparing providers.
- Separate consumer and B2B auth paths If the product may serve both individual users and enterprises, design distinct identity assumptions for each path.
- Review claims and token scope as access controls Limit custom claims to what the application truly needs, and validate that token contents do not expose tenant or role data beyond the intended boundary.
What's in the full article
WorkOS's full article covers the operational detail this post intentionally leaves for the source:
- Side-by-side feature breakdowns for SSO, SCIM, multi-tenancy, and audit logging across the five options.
- Implementation-oriented trade-offs for ASP.NET Core Identity, IdentityServer, Azure AD B2C, and OpenIddict.
- The practical selection criteria behind each option's fit for B2B SaaS, consumer apps, and internal platforms.
- Product-specific pricing and packaging details that help teams move from architecture review to build planning.
👉 Read WorkOS's comparison of authentication options for secure .NET apps →
.NET auth providers: what IAM and SSO trade-offs matter most?
Explore further
Authentication selection for .NET is really an identity governance decision. The article is framed as a technology comparison, but the underlying issue is whether the application can support enterprise lifecycle controls once customers arrive. SSO, SCIM, audit logging, and tenant-aware roles are governance requirements, not feature extras. Practitioners should evaluate auth providers by how much identity process they externalise cleanly versus force into custom code.
A few things that frame the scale:
- The average estimated time to remediate a leaked secret is 27 days, despite 75% of organisations expressing strong confidence in their secrets management capabilities, according to The State of Secrets in AppSec.
- Only 44% of developers are reported to follow security best practices for secrets management, exposing a significant developer behaviour gap.
A question worth separating out:
Q: Should organisations build their own identity layer or buy one for .NET enterprise apps?
A: Build when the app only needs straightforward authentication and the team can manage the operational burden. Buy or adopt a specialised platform when the roadmap includes federation, SCIM, auditability, or customer-managed identity settings. The decision should reflect governance complexity, not developer preference alone.
👉 Read our full editorial: Authentication choices for .NET apps shape enterprise identity governance