0xcert - Your ID, degree or house. 0xcert-ified on the blockchain
Amazon Cognito - Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. It scales to millions of users and supports sign-in with social identity providers and enterprise identity providers via SAML 2.0.
Velix.ID - Frictionless Identity verification through Blockchain
NoPass.me - Open-source identity verification
Veriff Station - Easy, accurate, and scalable ID verification
Authenteq - User-owned and controlled blockchain-based online ID