Clerk’s Two Factor Authentication (or Multi-Factor) Authentication (MFA) app allows you to receive verification codes from any online service. Clerk supports both virtual and non-voip phone numbers. Use clerk on any website and speed up login with your partners and employees by receiving one time passwords and verification codes.
Online SMS Verification
Shared Multi-factor Authentication
Use Numbers on Any Website
Create Unlimited Numbers
Receive Verification Codes in Seconds in:
A VoIP number, also known as Voice over IP number, is a virtual phone number that works with most of online services to receive one time passwords (OTP), but not all. A number of services can work with a virtual phone number via voice transcription.
Non-VoIP or Real phone numbers are usually required by highly sensitive websites such as banks, Facebook, Linkedin... This type of phone number will work with ALL online services.
Refer to the following table for a breakdown of some of the popular supported services.