Cotter - One-click phone number login and checkout
TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type
Feather Auth - Build an entire sign-in flow in 5 minutes or less.
Authy - Best rated Two-Factor Authentication smartphone app for consumers, simplest 2fa Rest API for developers and a strong authentication platform for the enterprise.
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
Byepass - Eliminating passwords