TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type
PropelAuth - PropelAuth hosts and manages your authentication.
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.
TypingDNA Authentication API - Secure users by their typing behavior with free low-code API