One-Time Password (OTP) via SMS

Secure your applications and users with instant and reliable SMS-based OTP delivery worldwide.

500ms

Average Delivery Time

99.99%

Successful Delivery Rate

200+ Countries

Global Coverage

What Is SMS OTP?

OTP (One-Time Password) is a unique, time-sensitive code sent to users via SMS for authentication. It’s widely used for login verification, password reset, and secure transactions.

  • Secure 2FA and multi-factor authentication
  • Single-use passwords with auto-expiration
  • Language and localization support
  • Carrier fallback routing and retry mechanisms
  • Supports alphanumeric and numeric OTP formats

Use Cases

  • User registration confirmation
  • Login verification for mobile & web apps
  • Password recovery & account reset
  • Transaction or payment authentication
  • Device binding or change alerts

Why Use CTL OTP Service?

  • Blazing fast global delivery
  • Built-in retry & smart routing
  • GDPR-compliant security
  • Flexible integration via REST API
  • Delivery reports and real-time monitoring

Secure Your Users with Trusted OTP Delivery

Get started with SMS OTP today and ensure your users always authenticate safely and instantly.