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Business Messaging Route

Bulk SMS Services in Noida

Power your campaigns with bulk SMS services, promotional SMS, transactional SMS, and OTP SMS delivery. Duotech Solutions delivers DLT-compliant messaging with instant API integration.

Starting at โ‚น0.15 / dispatch unit
TRAI Vetted Layer
DLT Registered
99.9% Availability

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Platform Overview

India's most trusted bulk SMS infrastructure.

Bulk SMS lets you send the same message to thousands of customers at once. It's the quickest way to share offers, send order updates, remind customers about payments, or deliver OTPs. As a trusted bulk SMS provider in India, Duotech Solutions delivers your messages across every telecom operator in the country with 99.9% uptime.

Every message is fully TRAI and DLT compliant, so your campaigns run without interruptions or rejections. Pricing starts at just โ‚น0.15 per SMS with flexible plans for every budget. Send campaigns from our easy-to-use dashboard or connect your own software using our simple REST API โ€” getting started takes minutes, not weeks.

Promotional vs Transactional SMS

Dimension Promotional Routing Transactional Routing
Use Case Marketing, offers, discounts, and brand announcements. Order confirmations, payment alerts, OTPs, and account updates.
Time Horizon 9:00 AM โ€“ 9:00 PM 24 hours a day
DLT Mandate Required by law Required by law
Identifier Prefix Sender ID must start with 'D' Standard 6-character sender ID
Performance Limit Up to 10,000 messages / minute Up to 100,000 messages / minute (priority)
Optimized For Offers, events, and customer retention. OTPs, payment alerts, and login verifications.
Sender ID Layout 6-character alpha format (e.g., DUOTCH) 6-character alpha format (e.g., DUOTCH)
Template Rule Must be pre-approved on DLT Must be pre-approved on DLT

Instant OTP Delivery

Need to verify a login or a payment in seconds? Our OTP messages go out on a priority route and reach your customer in under 2 seconds โ€” fast enough to keep the flow smooth and secure. Built for high-security use cases like banking, logins, and payments.

  • Delivered in under 2 seconds
  • Priority network route
  • Works with any OTP format
  • Auto re-route if delivery fails
Verification Code
847291
Expires in 5 minutes
< 2.0s Delivery
99.9% Success Rate
24/7 Uptime

Technical Features

Unicode & Regional Languages

Send SMS in Hindi, Tamil, Telugu, and other regional languages without the text getting garbled.

Personalized Messages

Add each customer's name, order number, or any other detail automatically in every message.

Excel & CSV Upload

Import contacts from Excel or CSV files โ€” we detect and validate the phone number column for you.

REST API

Add SMS to your own app or website easily with our REST API and ready-made SDKs.

Schedule Messages

Pick any future date and time and we'll send your campaign automatically โ€” no manual work.

Automated Alerts

Set up recurring reminders for payments, renewals, and updates โ€” and forget about them.

Contact Groups & Tags

Tag and filter your contacts so you can target the right audience for every campaign.

Delivery Reports

See exactly which messages were delivered, failed, or are still pending โ€” down to each number.

OTP Delivery

Send bank-grade OTPs automatically, with priority delivery for time-sensitive codes.

Two-Way SMS

Let customers reply to your messages and receive their responses in real time.

URL Shortener

Shorten links in your messages and track how many people actually clicked them.

Custom Sender ID

Use your own 6-character sender ID (like DUOTCH) so customers always see your brand.

Simple Dashboard

Manage campaigns, credits, and delivery reports from one clean, easy-to-use dashboard.

Team Permissions

Give each team member their own login with restricted access, so only the right people can send.

Ready-Made Templates

Start faster with a library of pre-approved SMS templates for common use cases.

Export Reports

Download your delivery logs in CSV or PDF for audits, records, and compliance.

Regulatory Compliance

DLT Registration Guide

Everything you need to know about DLT registration, why it's mandatory for business SMS in India, and how we handle it for you.

What is DLT?

DLT (Distributed Ledger Technology) is a compliance platform set up by TRAI (Telecom Regulatory Authority of India) to regulate commercial SMS. Every business sending promotional or transactional messages in India must register on DLT and get approval for their sender IDs and message templates before sending.

In simple terms: you register your business, pick a 6-character sender ID (like DUOTCH), and get your message templates approved. Once that's done, your messages are good to go. Messages from unregistered businesses are simply blocked by the telecom operators.

Compliance Requirements

  • Required for All Business SMS Every promotional and transactional message must be DLT-registered. Unregistered messages are automatically rejected by the operators.
  • Blocks Spam Every sender and message is verified, so scam and spam messages are filtered out before they ever reach a customer.
  • Templates Need Approval Your message templates must be pre-approved on DLT before use, so customers always know who is messaging them.
  • Verified Sender IDs Your sender ID is linked to your registered business, so no one else can send messages pretending to be you.

Step-by-Step Registration Process

1
Register on DLT Platform

Sign up on your telecom operator's DLT portal (Jio, Airtel, Vodafone, BSNL) with PAN, GST, and business identity documents.

2
Get Your PE ID

Receive your Principal Entity ID after verification. This usually takes 1โ€“2 business days.

3
Create Sender ID (Header)

Register a 6-character alphabetic sender ID (e.g., DUOTCH) linked to your brand.

4
Create & Submit Templates

Write your SMS templates for promotional, transactional, or service categories and submit for DLT approval.

5
Map Your IDs to Duotech

Link your PE ID, sender ID, and templates to your Duotech account so you can start sending SMS right away.

Registration Timeline

DLT registration typically takes 2โ€“5 business days. We handle the entire process for you โ€” just submit your documents and we'll take care of the rest.

We Handle It For You

DLT registration can be confusing, so our team does the heavy lifting. Just share your documents and we'll complete the registration and approvals on your behalf.

Get DLT Help

New to DLT? Read the step-by-step DLT registration guide

Core Integration

Bulk SMS API Integration

Integrate transactional notifications seamlessly using our simple, robust REST architecture. Deliver targeted alerts globally via concise JSON schemas.

POST https://api.duotechsolutions.in/v1/send
{
  "api_key": "your_api_key_here",
  "sender_id": "DUOTCH",
  "phone": "91XXXXXXXXXX",
  "message": "Hello {name}, your code is {otp}.",
  "template_id": 12345
}

Webhooks

Get instant delivery status callbacks to your server as messages are processed.

REST API

Predictable endpoints utilizing declarative standard HTTP calls and protective rate barriers.

Flexible Formats

Full support parsing structural JSON payloads and historic XML formats depending on preferences.

Native SDKs

Pre-packaged wrappers for deployment across Python, Node, PHP, Java, and common backend frameworks.

Implementation Stacks

Deploy production code environments via drop-in language modules

<?php
$data = [
    'api_key'     => 'YOUR_API_KEY',
    'sender_id'   => 'DUOTCH',
    'phone'       => '91XXXXXXXXXX',
    'message'     => 'Your verification code is 847291',
    'template_id' => 12345
];

$ch = curl_init('https://api.duotechsolutions.in/v1/send');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);
curl_close($ch);
const axios = require('axios');

const sendSMS = async () => {
  const response = await axios.post('https://api.duotechsolutions.in/v1/send', {
    api_key: 'YOUR_API_KEY',
    sender_id: 'DUOTCH',
    phone: '91XXXXXXXXXX',
    message: 'Your verification code is 847291',
    template_id: 12345
  });
};
import requests

payload = {
    "api_key": "YOUR_API_KEY",
    "sender_id": "DUOTCH",
    "phone": "91XXXXXXXXXX",
    "message": "Your verification code is 847291",
    "template_id": 12345
}

response = requests.post(
    "https://api.duotechsolutions.in/v1/send", 
    json=payload, 
    headers={"Content-Type": "application/json"}
)
import java.net.http.*;
import java.net.URI;

var client = HttpClient.newHttpClient();
var json = "{\"api_key\":\"YOUR_API_KEY\",\"sender_id\":\"DUOTCH\",\"phone\":\"91XXXXXXXXXX\"}";

var request = HttpRequest.newBuilder()
  .uri(URI.create("https://api.duotechsolutions.in/v1/send"))
  .header("Content-Type", "application/json")
  .POST(HttpRequest.BodyPublishers.ofString(json))
  .build();
use Illuminate\Support\Facades\Http;

$response = Http::withHeaders([
    'Content-Type' => 'application/json'
])->post('https://api.duotechsolutions.in/v1/send', [
    'api_key'     => config('sms.api_key'),
    'sender_id'   => 'DUOTCH',
    'phone'       => '91XXXXXXXXXX',
    'message'     => 'Your verification code is 847291',
    'template_id' => 12345
]);

Request Sandbox Authorization

Provision an immediate testing environment with 100 sandbox units. Zero initial commitments required.

Acquire API Credentials

Delivery Reports & Real-Time Analytics

Track every SMS payload with precision. Gain total engineering visibility into your scale, transmission logs, and immediate delivery verification parameters.

2.4M+
Total Outbound
2.38M+
Delivered
0.5%
Bounce Rate
99.2%
Delivery Rate

Real-Time Tracking

Monitor transaction streams as they process. Observe latency status shifts within milliseconds of execution, backed by granular error diagnostics.

Campaign Analytics

Evaluate aggregate data distributions cleanly. Graph core indicators across user segments, trend thresholds, and historical delivery benchmarks.

Structured Data Export

Extract native delivery registers in formatted CSV or high-fidelity PDF layouts. Perfect for internal audits, telemetry alignment, and compliance reporting.

Interaction Tracking

Isolate payload click-through rates along explicit route redirects. Attribute business conversion values back down to precise messaging segments.

DLR Webhooks & Callbacks

Feed automated transmission updates seamlessly into your microservices via concurrent asynchronous HTTP POST notifications.

Optimisation Engine

Algorithmic models evaluate platform traffic distributions to continuously compute superior delivery execution windows and bypass potential congestion nodes.

Scale-Optimized Tariffs

Transparent payload metrics tiering clear of unexpected baseline provisions. Select an allocation volume engineered around your existing operational scope.

Baseline Tier

Starter

โ‚น0.15 / message

Engineered for localized early deployment, small workflows, and simple audience campaign tests.

  • Up to 10,000 dispatches / mo
  • Promotional & Transactional routes
  • Standard Browser Console Panel
  • Native Transmission Reports (DLR)
  • Basic Subscriber Group Filters
  • Programmatic REST Endpoint Access
  • Advanced Analytics
Get Started
Custom Volume

Enterprise

Custom

Tailored explicitly for high-throughput scaling frameworks requiring custom service SLAs.

  • Uncapped Transmission Volumes
  • Volume-Indexed Dynamic Rates
  • Dedicated Systems Engineer
  • Custom Integration & SMPP Bind options
  • Legally Enforced Availability SLA
  • White-Label Gateway Deployments
  • 24/7 Priority Emergency Coverage
Contact Sales
Stated standard matrices exclude statutory GST balances. Compulsory operator DLT platform ledger filings calculate independently. Get Custom Quote

International Outbound Coverage

Deliver bulk messages to international destinations seamlessly. Reach subscribers worldwide via low-latency carrier connections engineered for high deliverability parameters.

190+
Countries Managed
900+
Carrier Routes
99.9%
SLA Availability
3-5s
Transit Window
India flag
India Direct Routes โ€ข +91
UAE flag
United Arab Emirates Premium Routing โ€ข +971
Saudi Arabia flag
Saudi Arabia Direct Routes โ€ข +966
United States flag
United States Local Aggregation โ€ข +1
United Kingdom flag
United Kingdom Adaptive Pathing โ€ข +44
Singapore flag
Singapore Tier-1 Node โ€ข +65
Malaysia flag
Malaysia Regional Hub โ€ข +60
Thailand flag
Thailand Adaptive Delivery โ€ข +66
Indonesia flag
Indonesia High Volume Route โ€ข +62
Japan flag
Japan Direct Routes โ€ข +81
Australia flag
Australia Premium Gateways โ€ข +61
New Zealand flag
New Zealand Standard Delivery โ€ข +64
Germany flag
Germany Encrypted Delivery โ€ข +49
France flag
France Standard Routes โ€ข +33
Netherlands flag
Netherlands Low Latency Node โ€ข +31
Canada flag
Canada Inter-Carrier Routes โ€ข +1
Brazil flag
Brazil High Throughput Path โ€ข +55
Mexico flag
Mexico Regional Gateway โ€ข +52
Qatar flag
Qatar Direct Routes โ€ข +974
Bahrain flag
Bahrain Premium Routing โ€ข +973
Kuwait flag
Kuwait Tier-1 Pathing โ€ข +965
Oman flag
Oman Direct Gateways โ€ข +968
South Africa flag
South Africa Regional Node โ€ข +27
Egypt flag
Egypt Standard Pathways โ€ข +20

Check Country Coverage

Review comprehensive tariff tables and specialized routing access regulations globally.

Verify Regional Rates

Bulk SMS Services by City

Dedicated bulk SMS landing pages for India's top business hubs. Same platform, same โ‚น0.15/SMS pricing, and full DLT support in every city.

Integrations & Partnerships

Seamlessly connect your favourite platforms and tools with our SMS gateway. Pre-built integrations, powerful APIs, and SDKs for every major framework.

E-Commerce Platforms

Shopify E-Commerce
W
WooCommerce E-Commerce
W
WordPress CMS
Z
Zapier Automation

CRM & Marketing Platforms

S
Salesforce CRM
H
HubSpot CRM

Developer SDKs & APIs

PHP
PHP Language
L
Laravel Framework
Node
Node.js Runtime
Py
Python Language
J
Java Language
C#
C# Language
Don't see your platform? Our REST API and webhooks work with any system. Contact us for custom integration support.

What Our Customers Say

Real businesses rely on Duotech for fast, reliable SMS every day. Here's what a few of our customers have to say.

"We use Duotech to send appointment reminders to our patients automatically. It's cut our no-show rate by 35% โ€” the clinic runs far more smoothly now."

Dr. Meera Iyer

Operations Head โ€” CityCare Hospital

"Their API was easy to integrate into our app for OTP verification. It's been rock solid โ€” we haven't had a single downtime issue in nine months."

Amit Verma

Principal Architecture Engineer โ€” NexGen SaaS

"Sending offers to our store customers used to be a real hassle. Now we just upload our Excel list and schedule the campaign โ€” it goes out to every store without any manual work."

Neha Gupta

Operations Director โ€” FashionHub Logistics

"Order updates and delivery alerts now reach our customers instantly. Since we switched, calls asking 'where's my order?' have dropped by 40%."

Rajesh Kumar

VP of Operations โ€” KartMarket Platform

"Keeping parents informed used to take forever. Now we send exam alerts and updates in Hindi and English, and every message reaches parents without a hitch."

Sunita Patel

Head Administrator โ€” DPS Institutional Systems

Frequently Asked Questions

Everything you need to know about our Bulk SMS service. Can't find your answer? Contact us.

Bulk SMS is the process of sending a large number of text messages to multiple recipients simultaneously. It's used by businesses for marketing campaigns, transactional alerts, OTP verification, appointment reminders, and more. Our platform lets you send thousands of SMS in seconds through a web panel or API.
Our Bulk SMS pricing starts at โ‚น0.15/SMS for the Starter plan (up to 10K SMS/month), โ‚น0.12/SMS for the Business plan (up to 1L SMS/month), and custom pricing for Enterprise. All prices are exclusive of GST. Volume discounts are available for higher tiers.
DLT (Distributed Ledger Technology) registration is mandatory under TRAI regulations for sending commercial SMS in India. All businesses must register on a DLT platform to get approval for sending promotional and transactional messages. We help you complete the DLT registration process quickly.
Promotional SMS are used for marketing, offers, and sales campaigns and are sent only between 9 AM to 9 PM. Transactional SMS are for alerts like OTPs, order confirmations, and bank notifications โ€” these can be sent 24/7 and are delivered even on DND (Do Not Disturb) numbers.
Yes, our platform supports OTP (One-Time Password) SMS through our Transactional route. OTPs are delivered within 3-5 seconds with 99.9% reliability. Our API supports auto-generated OTPs and custom OTP templates.
Messages are typically delivered within 3-5 seconds. Transactional and OTP messages are prioritised for instant delivery. Promotional messages may take slightly longer depending on network congestion and operator queues.
A Sender ID is a 6-character alphanumeric identifier that appears as the sender of your SMS (e.g., DUOTECH, HDFCBK, AMZN). It must be registered on the DLT platform and approved before you can send messages. Each industry has specific sender ID formats.
Yes, you can schedule SMS campaigns to be sent at any future date and time. Our scheduling feature lets you plan campaigns in advance โ€” set the exact date, time, and timezone for your messages. This is perfect for festival greetings, birthday messages, and timed promotions.
Yes, you can upload contact lists via Excel (.xlsx) or CSV files. Our platform auto-detects phone number columns and validates numbers before sending. You can also create and manage contact groups for easy campaign management.
Yes, we provide a comprehensive REST API with detailed documentation. The API supports sending SMS, checking delivery reports, managing contacts, and more. We also offer SDKs for PHP, Laravel, Node.js, Python, Java, and C#. Our API uptime is 99.9%.
We support English (ASCII) and all Indian languages including Hindi, Tamil, Telugu, Bengali, Marathi, Gujarati, Kannada, Malayalam, Punjabi, and more through Unicode SMS. Regional language messaging helps you connect better with local audiences.
Every SMS sent through our platform comes with a delivery report (DLR). You can view delivery status in real-time on your dashboard โ€” delivered, failed, pending, or rejected. You can also download detailed CSV/PDF reports and set up HTTP webhooks for automatic DLR callbacks.
Yes, our platform fully supports Unicode SMS for Hindi and all other Indian regional languages. Unicode messages can contain up to 70 characters per segment (vs 160 for ASCII). You can type or paste Hindi text directly in the message composer.
Your SMS credits are valid for 12 months from the date of purchase. We send reminder notifications before expiry so you can use your remaining credits. For Enterprise plans, credit validity can be extended as per the SLA agreement.
We support SMS delivery to 190+ countries across the globe. This includes India, UAE, USA, UK, Canada, Singapore, Australia, Saudi Arabia, and many more. Each country has its own pricing and delivery rates. Contact us for country-specific coverage details.
Yes, our platform is fully TRAI and DLT compliant. We follow all regulations for Header (Sender ID) registration, template approval, and message filtering. We help businesses with end-to-end DLT registration and ensure all messages meet regulatory standards.
We offer email support for all plans, priority chat and phone support for Business plans, and 24/7 dedicated support for Enterprise customers. Our support team is available Monday-Saturday, 10 AM to 7 PM IST. We also provide onboarding assistance and API integration support.
Getting started is simple: 1) Sign up for a free account on our website. 2) Complete your DLT registration (we'll guide you). 3) Choose a pricing plan that fits your needs. 4) Upload your contacts and start sending SMS. Our team will help you with the complete setup process.

Ready to Supercharge Your Communication?

Join 500+ businesses using Duotech Bulk SMS to reach millions of customers. Get started with a free trial today.

TRAI & DLT Compliant
99.9% Uptime
No Hidden Fees
500+ Happy Customers