Auth0 is an identity platform that provides Single Sign-On for your web applications, mobile applications and APIs with social and enterprise identities. Auth0 provides SDKs for Windows Azure Mobile Services, ASP.NET, ServiceStack, Web API, Ruby, Node, PHP, among others.
Up to 100 users, 2 applications, 2 social providers and 1 enterprise connection
Up to 1,000 users, 4 applications, 4 social providers and 4 enterprise connections
Up to 10,000 users, unlimited applications, unlimited social providers and unlimited enterprise connections
Up to 50,000 users, unlimited applications, unlimited social providers and unlimited enterprise connections