OTP SMS

OTP & Transactional SMS, Delivered Instantly

Authentication codes and transaction alerts delivered 24×7 in under 5 seconds — even to DND numbers.

Overview

Mission-Critical Delivery for OTPs & Alerts

When a login, payment or signup depends on a message, it has to arrive instantly — every time.

Our OTP / Transactional SMS route is TRAI-compliant and delivers to DND-registered numbers 24 hours a day, 7 days a week, with typical delivery under 5 seconds. It's built for authentication codes, payment confirmations, delivery alerts and any time-sensitive transactional message your application needs to send.

Talk to Expert View Pricing

Features

Everything You Need, Built In

A complete toolkit to launch, run and scale your campaigns.

Under 5-Second Delivery

High-priority routing for near-instant delivery.

DND Number Delivery

Reaches DND-registered numbers for transactional content.

24×7 Uptime

No delivery window restrictions, any time of day.

TRAI-Compliant

Fully compliant transactional routes and templates.

Web API Integration

Simple REST API for OTP generation and sending.

High Throughput

Built to handle traffic spikes during peak usage.

How It Works

Live in 4 Simple Steps

Get API Key

Register Templates

Submit DLT-approved OTP/transactional templates.

Integrate API

Connect our API to your login, checkout or alert flow.

Go Live

Send OTPs and alerts in production, 24x7.

Use Cases

Who Uses OTP SMS?

🔐 Login Authentication

💳 Payment Confirmations

🛒 Order Updates

🏦 Banking Alerts

🚛 Delivery Tracking

🎫 Booking Confirmations

🏥 Appointment Alerts

📦 Shipment Notifications

Why Pro Bulk SMS

Built for Reliability & Scale

Sub-5-second average delivery time
Delivers to DND numbers, 24x7
DLT template registration support
Built for high-volume, spike traffic
Simple, well-documented REST API

FAQs

Common Questions

Yes — transactional/OTP routes are permitted to deliver to DND numbers under TRAI regulations, unlike promotional SMS.

Typical delivery time is under 5 seconds for OTP and transactional messages.

Yes, DLT template registration is required for transactional SMS; our team can guide you through approval.

Yes, a REST API with documentation is provided for easy integration into login, checkout or alert systems.