TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type
LoginRadius Authentication - Secure and robust authentication, SSO with user management
Cotter - One-click phone number login and checkout
Authorizer - Authorizer is an open-source authentication and authorization solution for your applications.
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
Myki Authenticator - Login to any account on any device with your fingerprint