A one-time password (OTP) is an automatically generated numeric or alphanumeric string of characters. It is used to authenticate and verify users before a transaction or a session in an app/website. Used by businesses to ensure a secure user flow, an OTP SMS service provider ensures timely delivery of these messages.
With a 98% open rate within 30 seconds, SMS is known for its high reliability. By sending One Time Passwords via SMS, you are sure to reach your users wherever they are.
Even when users don't have access to the internet they can still use this multi-factor authentication solution.