Velix.ID - Frictionless Identity verification through Blockchain
NoPass.me - Open-source identity verification
BlockCypher - AWS for Block Chains
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.
Hyperledger - Hyperledger is a multi-project open source collaborative effort hosted by The Linux Foundation, created to advance cross-industry blockchain technologies.
Stripe Identity - The easiest way to verify identities