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.
NoPass.me - Open-source identity verification
Basis ID - KYC & AML workflow management platform
Civic Token - Access to identity verification via the blockchain
Company Advisory verification by SpringRole - Verify ICO advisors on the Blockchain
BlockScore - The intelligent ID verification system