NoPass.me - Open-source identity verification
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.
Authenteq - User-owned and controlled blockchain-based online ID
Identance - A tool to identify and verify your users
Velix.ID - Frictionless Identity verification through Blockchain
Identity Verification Tooling - Identity verification software for your in-house KYC team