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Based on our record, DotNetOpenAuth seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
But if the OpenID server would be for a intranet or low number of requests, you can go ahread (in my opinion) and the post also recommends http://dotnetopenauth.net/ because has a OpenID provider and samples. Source: about 3 years ago
IdentityServer - An open-source, standards-compliant, and flexible OpenID Connect and OAuth 2.x framework for ASP.NET Core
VerifyKit - Enables quick access to your web and mobile applications.
ASP.NET Identity - ASP.NET Identity is a membership-based software system designed for the authentication and authorization of the users via building an ASP.NET application.
VerifiedCreators - VerifiedCreators is the first native and public Non-KYC verification platform built from the ground up (specifically) for DeSo creators and investors.
PwdLess - PwdLess is an open-source and reliable authentication server that legitimizes you to register or login users without the need for a password.
Mati - Online identity verification platform for fast-growing companies. Increase safety on your product, and comply with KYC / AML regulations.