Microsoft Azure Active Directory Basic B2C - overage fee - 10000 users

Stay connected with your consumers with a cloud identity service, that is more reliable, and cost-effective. Built on Azure Active Directory, the highly secure cloud identity platform, that handles multiple authentications per day, Azure Active Directory B2C is a highly available, global, identity management service for consumer-facing applications, that scales to a lot of identities. It can be easily integrated across mobile and web platforms. Your consumers can log on to all your applications through fully customizable experiences by using their existing social accounts or by creating another credentials.