TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type
Typing Speed Test - A simple typing test to see how fast you can type
Cotter - One-click phone number login and checkout
LoginRadius Authentication - Secure and robust authentication, SSO with user management
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
authzed - The platform to store, compute, and validate app permissions