Business Communication & Messaging Solutions for Businesses

Duotech Support

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What are you looking for?

WhatsApp · SMS · IVR · Voice OBD · RCS

Business Communication & Messaging Solutions

Bulk SMS, WhatsApp Business API, RCS, Cloud IVR, Voice OBD and software development solutions from DuoTech Solutions.

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BusinessesAcross India
MessagesDelivered reliably
ProjectsCustom software & integrations
/api/v1/send
Statusdelivered
ChannelWhatsApp
Latency124ms
CampaignQ3 Broadcast
Throughput18,420 req/s
❝

Duotech helps teams deliver reliable messaging and voice flows with expert integration and ongoing support.

— Product & Engineering Partners Selected clients and partners
DLT Registered Security & Compliance DPAs Available GST Registered
Solutions for
Banking Fintech E-Commerce Healthcare Logistics EdTech Real Estate Travel
The Duotech Advantage

Why Duotech Solutions

Reliable messaging, voice systems, and custom software — built to help businesses communicate and operate efficiently.

Responsive Support

Dedicated technical support and onboarding to help you deploy and maintain communication workflows.

DLT & TRAI Compliant

We assist with DLT registration and template management to keep your campaigns TRAI-compliant.

Developer-Friendly APIs

REST APIs, webhooks and code samples to integrate messaging and voice into your applications quickly.

Built For Business

Reliable messaging and custom integrations for growing teams.

We provide dependable messaging and voice services, plus custom software and integration support to help businesses communicate with customers effectively.

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High Availability

Availability & Reliability

Redundant routing and monitoring help keep your communication channels online; SLA-backed plans are available.

Millions+

Messages Delivered

Reliable delivery across SMS, WhatsApp, and voice channels with support for international routing.

Trusted

Businesses Served

We work with businesses across banking, fintech, e-commerce, healthcare, and logistics.

Start Your Deployment

Get a personalized consultation and architecture review for your communication stack.

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Capabilities

Integrated Solution Architectures

We engineer practical digital ecosystems to streamline business communication and support growth.
01 / Messaging

Bulk SMS
Engines

High-throughput delivery systems designed for reliable delivery and wide geographic reach.

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02 / Social

WhatsApp
Business

Seamless API integration for conversational commerce, automated support, and high-fidelity customer engagement.

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03 / Voice

Smart IVR
Solutions

Intelligent voice response systems with configurable routing and speech options to improve caller experience.

Listen In
04 / Voice

Voice
OBD

Automated outbound voice campaigns with intelligent routing, real-time analytics, and high-delivery infrastructure.

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05 / Code

Digital
Product Dev

Architecting robust, scalable web applications using modern stacks optimized for performance and aesthetic impact.

Build Product
06 / Intelligence

Custom CRM
Solutions

Tailored CRM and data tools that synthesize customer information into actionable workflows and better operations.

Manage Data
Domain Expertise

Industries We Serve

Tailored communication solutions for every sector — from healthcare deployments to e-commerce workflows.

Healthcare

Secure messaging for hospitals and clinics (we support HIPAA-capable deployments).

Banking & Finance

Transactional SMS, OTP services, secure alerts

E-Commerce

WhatsApp API for order updates, cart recovery

Education

Bulk SMS for schools, colleges, exam alerts

Real Estate

IVR systems for property inquiries, voice OBD campaigns

Logistics

Real-time tracking alerts, delivery confirmations

Travel & Hospitality

Booking confirmations, voice notifications

Retail

Promotional SMS, WhatsApp marketing campaigns

Restaurants

CRM for orders, WhatsApp for reservations

EdTech

RCS messaging for rich learning content
API Integration Partners | Developer APIs, Webhooks & CRM Connectors | Duotech Solutions

Duotech Support

Typically replies instantly

Hi there! 👋
What are you looking for?

Build & Integrate

API & Integrations

Business-ready REST APIs, real-time webhooks, and pre-built integrations designed for seamless engineering workflows.

API Capabilities

RESTful APIs

Clean JSON endpoints for SMS, WhatsApp, and Voice — built on predictable, resource-oriented URLs.

Webhook Callbacks

Real-time delivery reports, read receipts, and status updates pushed directly to your endpoint.

SDKs & Code Samples

Client libraries and examples for common languages, plus Postman collections to accelerate integration.

Comprehensive Docs

Detailed API reference with copy-paste code examples, sandbox environment, and Postman collections.

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CRM Integrations

Connectors and integration services for Salesforce, HubSpot, Zoho, and custom CRM systems.

Shopify & WooCommerce

Transactional alerts, order confirmations, and abandoned cart recovery via messaging.

Custom API Integration

Purpose-built middleware and webhook orchestration for business workflows.

Comprehensive API Surface

Rich REST endpoints, webhooks and admin APIs covering messaging, voice, analytics, billing, and account management.

// WHAT WE BUILD
WEB

Web Applications

Custom websites and web apps built with modern frameworks. Fast, secure, and optimized for search engines.

Next.js TypeScript
Explore Web Development →
ANDROID

Android Apps

Native Android applications that run smoothly on all devices. Built with the latest tools and best practices.

Kotlin Jetpack Compose
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iOS

iOS Apps

Premium iOS applications designed for iPhone and iPad. Clean, fast, and Apple-ecosystem ready.

SwiftUI Swift
Explore iOS Development →
How It Works

From Discovery to Deployment

Four stages to transform your communication infrastructure — from audit to live deployment with full business support.

01

Discovery & Audit

We analyze your current messaging and voice infrastructure, identifying bottlenecks and mapping your requirements to the right technology stack.

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02

Solution Design

Architects design your custom communication framework — selecting the optimal mix of Bulk SMS, WhatsApp API, IVR, and Voice OBD channels.

Bulk SMS
03

Integration & Build

Our engineering team integrates APIs, configures routing logic, and deploys your solution into a staging environment for rigorous validation.

WhatsApp API
04

Deploy & Monitor

Production deployment with monitoring, automated failover, and dedicated support. SLA-backed uptime commitments are available for qualifying plans.

IVR & Voice
Global Reach

Service Coverage

PAN India presence with international SMS routing through partner networks. We work with operators and partners to optimise delivery.

India

PAN India

Full PAN India coverage with direct connections to all major telecom operators. Local routing for highest delivery rates.

UAE / Middle East

Dubai · Abu Dhabi · Sharjah

Established routes across the UAE and broader Middle East region. Dedicated corridors for reliable delivery.

Southeast Asia

Singapore · Malaysia · Indonesia

Expanding footprint across Southeast Asian markets. Reliable messaging routes to Singapore, Malaysia, and Indonesia.

Global

International Reach

International SMS routing through partner networks and operator connections for broad geographic reach.

International Routing Partners
Extensive Operator Coverage
High Route Availability
Resources

Latest from Our Blog

Insights on Bulk SMS, WhatsApp API, Cloud Telephony & more

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04

Product Suite

Practical tools designed to support business communication, customer workflows, and operational efficiency.

CRM
Core

A unified relationship management platform. Orchestrate lead acquisition, pipeline intelligence, and behavioral analytics in a single, immersive interface.

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Voice
OBD

Automated outbound dialing with intelligent routing, real-time campaign analytics, and carrier-aware delivery infrastructure.

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IVR
Systems

Intelligent voice response with NLP routing, automated call flows, and deep analytics for reliable telephony operations.

Explore IVR
Frequently Asked Questions | Bulk SMS, WhatsApp API, IVR, DLT Registration | Duotech Solutions

Duotech Support

Typically replies instantly

Hi there! 👋
What are you looking for?

Knowledge Base

Frequently Asked Questions

Everything you need to know about Bulk SMS, WhatsApp API, IVR, Voice OBD, DLT registration, and our platform.

Bulk SMS is a service that allows businesses to send large volumes of text messages to multiple recipients simultaneously. It is commonly used for promotional campaigns, transactional alerts, OTP verification, and customer notifications.

Yes, as per TRAI regulations, DLT (Distributed Ledger Technology) registration is mandatory for all businesses sending Bulk SMS in India. You must register your business, SMS headers, and content templates on the DLT platform before sending messages.

PE ID stands for Principal Entity ID. It is a unique 15-digit registration number assigned to your business on the DLT platform after successful registration. You need this ID to register SMS headers and templates.

The WhatsApp Business API enables businesses to send and receive WhatsApp messages programmatically. It supports automated notifications, customer support conversations, and marketing campaigns with rich media. Unlike the WhatsApp Business App, the API allows integration with your CRM and automation tools.

Cloud IVR (Interactive Voice Response) is a telephony system hosted on the cloud that automates incoming call handling. It uses voice menus and keypad inputs to direct callers to the right department without human intervention.

Transactional SMS are triggered by user actions (e.g., OTP, order confirmation, bank alerts) and can be sent 24x7. Promotional SMS are marketing messages restricted to 9 AM to 9 PM by TRAI regulations. Transactional messages have higher delivery priority.

DLT template approval typically takes 2-3 business days for standard templates. Complex templates or those with URL shorteners may take longer. We assist with template creation to ensure faster approval.

Yes, we provide a RESTful SMS API with support for multiple programming languages including PHP, Python, Node.js, Java, and cURL. The API supports bulk sending, OTP generation, delivery reports, and webhook callbacks.

Yes, we offer connectors and integration support for popular CRMs such as Salesforce, HubSpot, and Microsoft Dynamics. We also provide webhooks and REST APIs for bespoke integrations.

OTP SMS can be sent using our Transactional SMS API. You can generate a random OTP on your server and send it through our API endpoints. We support features like resend OTP, expiry timers, and delivery confirmation.

RCS (Rich Communication Services) is the evolution of SMS that supports rich media, interactive buttons, read receipts, and typing indicators. Unlike plain SMS, RCS messages look like chat apps and offer higher engagement rates.

Voice OBD (Outbound Dialing) allows automated voice calls to large customer lists. Benefits include personalized voice messages, real-time delivery tracking, interactive call flows, and integration with CRM data.

Yes, we are fully compliant with TRAI regulations for Bulk SMS, including DLT registration, header and template registration, and DND compliance. Our platform automatically filters DND registered numbers for promotional campaigns.

Yes, our dashboard allows you to schedule SMS campaigns for future dates and times. You can also set recurring schedules for periodic messages like daily alerts or weekly newsletters.

A single SMS has a 160-character limit for standard GSM encoding. Messages exceeding 160 characters are automatically split into multiple segments. Unicode messages (e.g., Hindi, Arabic) have a 70-character limit per SMS.

We use encryption for API traffic, support multi-factor authentication for dashboard access, and follow industry security best practices. We can support GDPR and HIPAA compliance where required and are able to sign DPAs for customers with specific data-protection needs.

We design for high availability using redundant routing, failover systems, and real-time monitoring. SLA-backed uptime commitments are available for eligible plans.

Yes, every message sent through our platform generates a detailed delivery report including delivered, failed, pending, and undelivered status. Reports are available in the dashboard and can be fetched via API or webhook callbacks.

Yes, we support international SMS delivery through operator routing and partner networks. We'll work with you to ensure optimal routes for your target countries.

The WhatsApp Business App is a free mobile app for small businesses with limited automation. The WhatsApp Business API is designed for medium to large businesses and supports programmatic messaging, multi-agent systems, CRM integration, and higher throughput.

Yes, we provide toll-free number services with IVR integration. You can set up a toll-free number for customer support with IVR menus, call routing, and call recording capabilities.

We support 6-character custom sender IDs for promotional SMS (e.g., BRANDX), numeric sender IDs for transactional/OTP SMS (e.g., 123456), and alphanumeric sender IDs for service SMS. All sender IDs must be registered on the DLT platform.

Getting started is simple: contact our sales team, complete the onboarding and DLT registration process, integrate our API or use our dashboard, and start sending messages. Most clients go live within 2-3 business days.

Business Communication

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Get in touch to deploy messaging, voice, and API solutions tailored to your business communication needs.

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