Best DotNetOpenAuth Alternatives ranked by AI · updated Aug 2026

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DotNetOpenAuth was an open-source .NET library for implementing OAuth, OpenID, and related authentication protocols. It primarily served ASP.NET developers, but the project is no longer actively maintained and targets older protocol and framework versions.

Developer: DotNetOpenAuth contributors Price: Free 🎯 dotnetopenauth.net

🔒 Authentication Authorization OAuth dotnet openid connect

Top 6 DotNetOpenAuth alternatives

Microsoft Identity Web

Microsoft

💡 Pick it for maintained ASP.NET Core integration with Microsoft Entra ID and Microsoft Graph.

Microsoft Identity Web is a library for integrating ASP.NET Core applications with Microsoft Entra ID and Microsoft identity platform services. It is...

Pros

Maintained by Microsoft for modern ASP.NET Core applications
Strong support for OpenID Connect, OAuth 2.0, and Microsoft Graph
Better fit for Entra ID than legacy DotNetOpenAuth integrations

Cons

Focused primarily on Microsoft identity services
Less suitable for completely provider-neutral authentication
Requires understanding of Entra ID configuration and tenant concepts

Free

Alternatives to Microsoft Identity... → Visit site

OpenIddict

Kévin Chalet and contributors

💡 Pick it when you need a current, open-source, self-hosted OAuth and OpenID Connect server for .NET.

OpenIddict is an open-source framework for implementing OAuth 2.0 and OpenID Connect servers and validation in .NET applications. It is aimed at...

Pros

Modern, actively maintained replacement for legacy .NET protocol libraries
Supports OAuth 2.0 and OpenID Connect server, client, and validation scenarios
Works with ASP.NET Core and common Entity Framework Core data stores

Cons

Requires more identity-server expertise than managed services
Configuration is more involved than using a hosted provider
Operational security and availability remain the application's responsibility

Free

Alternatives to OpenIddict → Visit site

ASP.NET Core Identity

Microsoft

💡 Pick it for built-in local user accounts in an ASP.NET Core application instead of legacy protocol code.

ASP.NET Core Identity is Microsoft's membership system for managing users, passwords, roles, claims, and account security in ASP.NET Core applications. It suits...

Pros

Included in the ASP.NET Core ecosystem with extensive Microsoft documentation
Provides built-in user, role, password, and account-management features
Integrates directly with Entity Framework Core and ASP.NET Core middleware

Cons

Not a complete identity provider by itself
OAuth and OpenID Connect server features require additional components
Less suitable for multi-application single sign-on without extra architecture

Free

Alternatives to ASP.NET Core Ident... → Visit site

Duende IdentityServer

Duende Software

💡 Pick it for a mature, customizable identity server supporting complex .NET SSO and API architectures.

Duende IdentityServer is an OpenID Connect and OAuth 2.0 framework for building centralized identity and access-control services on .NET. It targets organizations...