OAuth2 vs OmniAuth: What are the differences?
What is OAuth2? An open standard for access delegation. It is an authorization framework that enables a third-party application to obtain limited access to an HTTP service, either on behalf of a resource owner by orchestrating an approval interaction between the resource owner and the HTTP service, or by allowing the third-party application to obtain access on its own behalf.
What is OmniAuth? OmniAuth is a flexible authentication system utilizing Rack middleware. OmniAuth is a Ruby authentication framework aimed to abstract away the difficulties of working with various types of authentication providers. It is meant to be hooked up to just about any system, from social networks to enterprise systems to simple username and password authentication.
OAuth2 and OmniAuth belong to "User Management and Authentication" category of the tech stack.
OmniAuth is an open source tool with 6.89K GitHub stars and 877 GitHub forks. Here's a link to OmniAuth's open source repository on GitHub.
StackShare, Code School, and DSTLD are some of the popular companies that use OmniAuth, whereas OAuth2 is used by Ataccama, BookMeBus, and Mubasher.info. OmniAuth has a broader approval, being mentioned in 20 company stacks & 18 developers stacks; compared to OAuth2, which is listed in 10 company stacks and 5 developer stacks.