C# Authentication Libraries
Libraries for C#
GitHub Star Comparison
| No | Name | GitHub Stars | Description | Trend | License | Type | Official Site |
|---|---|---|---|---|---|---|---|
| 1 | ASP.NET Core Identity | ⭐ 37.3k | Standard authentication and authorization system for ASP.NET Core. Integrates user management, password management, and role-based access control | Solid position as standard choice for ASP.NET Core development. Continued adoption in enterprise application development | MIT | Framework-Integrated Auth | Official |
| 2 | OpenIddict | ⭐ 4.9k | OpenID Connect and OAuth2.0 server implementation for ASP.NET Core. Provides lightweight and customizable authentication infrastructure | Rising attention as alternative choice to IdentityServer. Supported by developers who value open-source and flexibility | Apache-2.0 | OAuth2/OpenID Connect Server | Official |
| 3 | Duende IdentityServer | ⭐ 1.6k | OpenID Connect and OAuth2.0 compliant authentication server. Successor to IdentityServer4 providing SSO, API protection, and federation features | Continuing growth as representative enterprise authentication infrastructure. Demand remains strong despite licensing changes requiring paid commercial use | Dual License | OpenID Connect Server | Official |
| 4 | Microsoft Authentication Library (MSAL) | ⭐ 1.5k | Authentication library for Microsoft identity platform. Simplifies integration with Azure AD, Microsoft Graph, Office 365, and more | Continuing growth with expanding demand for Microsoft ecosystem integration. Rapid adoption increase due to accelerating corporate cloud migration | MIT | Cloud Identity Integration | Official |
| 5 | Auth0 .NET SDK | ⭐ 356 | Official .NET SDK for Auth0 authentication service. Integrates enterprise IDaaS features into .NET applications | Increasing demand due to expanding enterprise IDaaS adoption. Improved developer experience with Auth0's enhanced .NET support | MIT | Cloud Auth Service | Official |
| 6 | JWT Bearer Authentication | - | JWT Bearer token authentication for ASP.NET Core. API authentication leveraging Microsoft.AspNetCore.Authentication.JwtBearer | Widely adopted as standard method for API authentication. Increasing demand due to microservices architecture adoption | MIT | API Token Authentication | Official |