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SMS Gateway
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Solutions
Bulk SMS & 2-Way

DLT-registered messaging for every use case, from OTPs to promotional campaigns, plus two-way SMS with long codes.

Transactional SMS

OTP SMS

Integrated OTP SMS

Promotional SMS

Service Explicit SMS

Service Implicit SMS

Long code

Quiz SMS
WhatsApp Messaging

WhatsApp Business API, templates, flows, and automation for customer engagement at scale.

WhatsApp Business API

WhatsApp Business Solutions

WhatsApp Workflow Automation

WhatsApp Flows

WABA Agents Chat

WABA Use Cases
Voice

Outbound voice campaigns and text-to-speech OBD for automated calling at scale.

OBD Voice Call

Bulk Voice Call

Text to Speech OBD
Miss Call

Missed call alerts and two-factor authentication via missed call verification.

Miss Call

2FA via Miss Call
Beyond SMS

RCS, multi-channel fallback, Telegram, Google Business Messages, and AI Assistant Connectors for omnichannel reach.

AI Agent Builder

Google Messages

Multi-Channel Fallback

RCS Messaging

Bulk Telegram Messaging

Web Chat Widget

AI Assistant Connectors: ChatGPT

AI Assistant Connectors: Claude
NEW
RCS Messaging is live

Rich, interactive messages with quick replies and a verified branded sender, the next step beyond plain SMS.
Explore RCS
Use Cases
Finance & Insurance

Secure OTP, alerts, and customer updates for banks, brokers, and financial services.

SMS & WhatsApp for Banks

SMS & WhatsApp for Insurance

SMS & WhatsApp for NBFCs & Lending

SMS & WhatsApp for Share Market

SMS & WhatsApp for Stock Broking

SMS & WhatsApp for Tax Consultants
Education

Attendance alerts, exam updates, and parent communication for schools and institutes.

SMS & WhatsApp for Colleges

SMS & WhatsApp for Education

SMS & WhatsApp for Schools

SMS & WhatsApp for Training Institutes

SMS & WhatsApp for Tutors
Retail & Commerce

Order updates, promotions, and loyalty campaigns for e-commerce and retail brands.

SMS & WhatsApp for Consumer Durable

SMS & WhatsApp for E-Commerce

SMS & WhatsApp for FMCG

SMS & WhatsApp for Food Delivery

SMS & WhatsApp for Jewelers

SMS & WhatsApp for Retail

SMS & WhatsApp for Restaurants
Health & Hospitality

Appointment reminders, health alerts, and guest communication for care and hospitality.

SMS & WhatsApp for Gyms

SMS & WhatsApp for Hospitals

SMS & WhatsApp for Hotels
Business & Tech

CRM alerts, lead nurturing, and operational messaging for modern businesses.

SMS & WhatsApp for Advertising

SMS & WhatsApp for IT & Software

SMS & WhatsApp for Real Estate

SMS & WhatsApp for Recruitment

SMS & WhatsApp for Startups

SMS & WhatsApp for Web CRM
More Industries

Industry-specific SMS and WhatsApp solutions across sectors and geographies.

Airlines & Aviation

Automobile

Construction

Courier & Logistics

Election Campaigns

Government & Public Sector

Matrimonial & Dating

Media & Entertainment

Travel & Tourism

View all industries
CASE STUDY
See real results

Read how businesses use SMS and WhatsApp API integrations for OTP, alerts, and customer engagement at scale.
View Case Studies
Pricing
Bulk SMS & 2-Way Pricing

Transparent per-SMS rates for transactional, OTP, promotional, and international messaging, plus dedicated and shared long code plans.

Transactional SMS Pricing

OTP SMS Pricing

Promotional SMS Pricing

International SMS Pricing

Dedicated Longcode Pricing

Shared Longcode Pricing
WhatsApp Pricing

Conversation-based WhatsApp Business API pricing with template and session rates.

WhatsApp Business API Pricing
Voice Pricing

Per-pulse OBD voice call rates for bulk campaigns and automated alerts.

OBD Voice Call Pricing
Miss Call Pricing

Affordable missed call service plans for lead capture and OTP verification.

Miss Call Service Pricing
Beyond SMS Pricing

RCS messaging and AI Agent Builder pricing for omnichannel, AI-powered reach.

RCS Messaging Pricing

AI Agent Builder Pricing
FREE DEMO
Try before you buy

Get free demo credentials and test SMS, WhatsApp, and voice APIs with your own workflows.
Get Demo Access
Resources
Developer Hub

REST APIs, SDKs, webhooks, and integration docs for SMS, WhatsApp, and voice.

Developers API

Integrations

Case Studies

SMS Software

Demo
Guides & Compliance

DLT registration, TRAI rules, SMS types, and mobile strategy resources for India.

DLT Registration Guide

Service Explicit vs Implicit

Why Mobile Strategy

Customizable Solutions

Robust Platform

Wide Reach
Add-ons

Plugins and extensions for WooCommerce, Magento, Google Sheets, and more.

WooCommerce WhatsApp Add-on

Google Sheet WhatsApp Add-on

WooCommerce SMS Alert Plugin

Magento 2 SMS Notification Plugin
Regulations & Security

Data security, sender ID compliance, and consumer protection policies.

Data Security

Sender ID Compliance

Consumer Protection
Tools & More

Free SMS tools, city coverage, site updates, and trace utilities.

Free Tools

All India SMS & WhatsApp Services

Site Updates

Trace
API DOCS
Build with our APIs

REST endpoints for SMS, WhatsApp, voice, webhooks, and account management with sample code and Postman collections.
Explore Developer API
SMS Reseller
- Become SMS Partner
- SMS Reseller FAQ
Blog
Knowledge Base
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Hubspot CRM Messaging integration

AI Agent Builder

30

AI Models
Deployment & Monitoring
Getting Started
Knowledge
Personality & Instructions
Tools & Actions (Channels)
Safety

API

20

How do I secure my API keys in a production environment?
What should I do if my API request times out?
Solving Common Verify OTP API Problems
Step-by-Step Guide to Using SMSGatewayCenter Verify OTP API
Troubleshooting Common OTP SMS API Issues
How to Integrate SMSGatewayCenter OTP SMS API
Developer API Types for Sending Messages via SMSGatewayCenter
How can I ensure my API Integration complies with DLT Regulations in India?
What are the Prerequisites for using the SMSGatewayCenter APIs?
How Do I Handle Bulk SMS Sending with the SMS API?
What programming languages can I use to Integrate SMSGatewayCenter APIs?
How do I debug if my API is not working?
How Can I Integrate the Voice Call API into My Application?
How Do I Send a “+” Sign in an SMS Using the API?
How Can I Integrate the WhatsApp Business API with SMSGatewayCenter?
How Can I Integrate the SMS API into My Application?
Why is my API key hidden, and how can I reveal it?
How do I regenerate an API key securely?
What should I do if my API key isn’t working?
How do I generate a new API key?

Bulk SMS

238

What Are Service Explicit SMS and Service Implicit SMS?
Why do I get a DND error when sending Transactional or OTP messages?
Why should businesses choose SMSGatewayCenter for SMS services?
What are the benefits of using an SMS Gateway for bulk messaging?
What does Promotional SMS mean?
What is meant by Transactional SMS?
How do International Long Distance Operator (ILDO) routes work for SMS to India?
Blocked Numbers
DLT
General
Integrated OTP SMS
Message Templates
Recurring SMS
Scheduled SMS
Send SMS
Sender ID
SMS Reports
SMPP
Split SMS Campaigns
Two-way SMS
Errors & Error Codes

General

20

Fintech

Integrations

298

Airtable Messaging Integration
Contact Form Integration
Google Sheets Integration
Hubspot CRM Messaging integration
Salesforce CRM Messaging Integration
Shopify Messaging
Zoho CRM Messaging integration

Groups & Contacts

21

Can I edit a contact after adding it?
How do I ensure my contacts are organized effectively for targeted messaging?
Can I add a contact without assigning it to a group?
What file formats are supported for importing contacts?
How do I import multiple contacts at once?
Is there a limit to the number of contacts I can add?
How do I add a new contact?
What information is displayed in the Contacts table?
How do I access the Contacts section in SMS Gateway Center?
What is the Contacts feature in SMS Gateway Center?
What does the “Group Type” column indicate?
Can I export my groups list?
What happens if I delete a group?
Is there a limit to the number of groups I can create?
Why is the “Save Changes” button disabled when adding a new group?
How do I add a new group?
How can I search for a specific group?
How do I access the Groups management interface?
What is the Groups feature in SMS Gateway Center?
How to Manage Contacts for Targeted Messaging in SMSGatewayCenter
How to Manage and Create Groups for Targeted Messaging in SMSGateway.Center

Mobile App

30

iOS
Android
General/Cross-Platform

OBD Voice Call

18

How can I use SMSGatewayCenter to send multi-language voice messages through Bulk Voice Call and OBD services?
What steps should I take to ensure compliance with regulations when using SMSGatewayCenter’s Bulk Voice Call service for promotional messages?
What advantages does SMSGatewayCenter’s Bulk Voice Call and OBD services offer to businesses in India?
How can I use SMSGatewayCenter’s Voice Call API to automate Bulk Voice and OBD campaigns, and what are the key parameters?
How do I schedule and manage Bulk Voice Call campaigns using SMSGatewayCenter, and what features are available?
What are the different use cases for Bulk Voice Call and OBD services offered by SMSGatewayCenter, and how can they benefit my business?
How does SMSGatewayCenter’s Text-to-Speech (TTS) feature work with Bulk Voice Call and OBD services, and what are its benefits?
How does SMSGatewayCenter ensure that transactional voice messages via OBD are delivered reliably, even with DND restrictions?
How can I leverage Bulk Voice Call service to run promotional campaigns in India?
What are Bulk Voice Call and OBD services, and how does SMSGatewayCenter support them for businesses in India?
Voice Call OTP

Reports

12

What management actions can I take on uploaded files in SMSGatewayCenter, and are there any limitations to these actions?
Why do I see ‘No records found’ in the Uploaded Files section on SMSGatewayCenter, and how can I resolve it?
What options are available for managing uploaded files on SMSGatewayCenter, and how can I use them?
What steps should I follow to search for uploaded files on SMSGatewayCenter, and what search criteria are available?
How does the Uploaded Files feature on SMSGatewayCenter help me send bulk SMS, and what does it include?
How do I receive delivery reports via SMPP?
What information is included in the Current Day’s Summary under the Delivery Report section?
What are Archived Reports?
How Can I Retrieve a Delivery Report for a Specific Phone Number?
What Do the Different Statuses in Delivery Reports Mean?
How Can I Export or Download Delivery Reports?
What is the difference between a Delivery Summary and a Delivery Report?

Resellers

79

Does SMSGatewayCenter Charge for Reseller Setup?
How do I send low balance alerts via WhatsApp Business API?
Can I include social site links in my email templates?
Can I disable WhatsApp low balance alerts after enabling them?
How do social site links in emails benefit my reseller business?
Can I add sender names for my users as a reseller?
How do I modify the status of my users’ sender names?
Is it possible to add DLT templates for my users?
Can I update the status of my users’ DLT templates?
Where can I check pricing adjustments for my users?
Can I bulk import sender names for multiple users at once?
What happens if I disable a user’s DLT template?
How do pricing adjustments affect my reseller profits?
How do I set my own OTP SMS template for downline users’ logins?
How can I showcase my third-party CRM integrations to users?
Can I offer my own pricing with custom OTP templates?
How do third-party integrations enhance my reseller business?
What is the Bulk SMS Reseller Program at SMSGatewayCenter?
How can I join the SMSGatewayCenter reseller program?
What features does the reseller program offer?
What are the benefits of becoming a bulk SMS reseller with SMSGatewayCenter?
How does SMSGatewayCenter support its resellers?
Who can become a reseller with SMSGatewayCenter?
What types of SMS services can I resell?
How secure is the reseller program for my clients’ data?
What tools help my customers manage SMS campaigns?
How does the reseller program compare to other SMS types?
What choices do I have when setting up the SMS Sandbox?
How do I activate my Sandbox Account on unify.smsgateway.center?
What is a Sandbox Account used for at SMSGatewayCenter?
Browser Extension Generator
CMS
- How do I add my own privacy, terms, and disclaimer content?
- Can I customize the contact form page with my address and content?
Domain Setup
Email Settings
Sandbox Setup
Branding
- Will the Postman collection reflect my brand as a reseller?
- Can I customize the reseller panel for my brand?

Security

19

How to Upgrade to TLS 1.3 for SMS Gateway Center API Integration
Can I Disable Message Encryption at Any Time?
Can I Use the Same API Key or Secret Token for Message Encryption?
What Security Measures Can I take to Protect My SMSGatewayCenter Account?
Login Trails
Session Management

Smart Links

9

How Does the Append HTTP Option Work in Smart Links?
Can I create a smart link while sending SMS with SMS Gateway Center?
How can I create a new Smart Link using the SMSGatewayCenter platform?
How do I view and understand the analytics data for a specific Smart Link on SMSGatewayCenter?
How can I check the analytical report for my Smart Links on SMSGatewayCenter?
What kind of attachments can be sent using Smart Links?
Can I use my own short domain for Smart Links?
Can I create a smart link while sending SMS using your system?
What is Smart Link?

Troubleshoot

2

Why Am I Seeing the “Error: DLT Rejected” on SMSGatewayCenter?
Why Am I Getting the “Error: No Valid Phone Numbers Found!” on SMS Gateway Center?

Users

79

Why was Calculation Units Display feature introduced?
How does Calculation Units Display feature benefit my business?
Where can I see my wallet balance in calculation units?
Will the (Calculation Units Display) calculation account for different SMS types, like promotional or transactional messages?
How does the Calculation Units Display calculate my SMS units?
What does the Calculation Units Display feature do?
How Do I Check My Account Balance on SMSGatewayCenter?
What Types of Credits Does SMSGatewayCenter Offer?
What changes when I upgrade from Sandbox to a paid account?
Can I test DLT SMS compliance in the Sandbox Account?
Why test with a Sandbox Account before going live?
How do I verify SMS delivery in the Sandbox Account?
How do I send a test SMS from the Sandbox Account?
How can I add more mobile numbers to my Sandbox whitelist?
Are there restrictions when using the Sandbox Account?
What occurs after enabling my Sandbox Account?
What choices do I have when setting up the SMS Sandbox?
How do I activate my Sandbox Account on unify.smsgateway.center?
What is a Sandbox Account used for at SMSGatewayCenter?
Account
API Key
Credit History
Docs Manager
Multi-Channel Fallback
Rate Plan

Webhook

17

Is it possible to create multiple webhooks for the same product?
What HTTP methods are supported for sending webhook data?
What happens if my webhook URL is unreachable or fails to respond?
Can I use HTTPS for my webhook URL?
Is webhook support available for all plans?
Can I change the webhook URL after it’s saved?
What should I return from my endpoint after receiving the webhook?
Do you retry webhook delivery on failure?
What are the benefits of using webhooks with SMSGatewayCenter for SMS and WhatsApp campaigns, and how do they improve my workflows?
Why do I see ‘No entries found’ in the Manage Webhooks section on SMSGatewayCenter, and how can I resolve it?
What parameters must I specify when setting up a DLR webhook on SMSGatewayCenter, and are there additional parameters for WhatsApp?
What is the process to test a webhook configuration on SMSGatewayCenter, and how can I verify it works correctly?
What steps should I follow to add custom parameters and headers to a webhook on SMSGatewayCenter, and why are they useful?
What options are available for managing webhooks on SMSGatewayCenter, and how can I view or edit them?
What is the process to configure a webhook for receiving WhatsApp Mobile Originated (MO) responses on SMSGatewayCenter?
What steps should I follow to set up a Webhook for receiving SMS or WhatsApp Delivery Receipts (DLR) on SMSGatewayCenter?
What are Webhooks, and how can SMSGatewayCenter help me implement them for SMS and WhatsApp integrations?

WhatsApp Business API

226

How to Add WhatsApp Contacts to Groups Directly from Inbox
What are the different message types available on the SMSGatewayCenter UI for WhatsApp Business API, and how can I send them?
How do I understand and use the MO response format when setting up a webhook for WhatsApp Business API with SMSGatewayCenter?
How do I set up and use the WhatsApp Message Sequencer to send messages in a specific order with SMSGatewayCenter?
How do I get opt-in consent from customers and manage them for WhatsApp messaging using SMSGatewayCenter?
How do I set up a WhatsApp retargeting campaign using the Retarget Users feature on SMSGatewayCenter?
Does SMSGatewayCenter support WhatsApp for specific industries?
Can I send low balance alerts via WhatsApp Business API?
How can WhatsApp Business API help with transactional updates?
Can I use WhatsApp Business API for marketing campaigns?
How can I use WhatsApp Business API for customer support?
What are the benefits of using WhatsApp Business API with SMSGatewayCenter?
Can I broadcast messages to multiple customers at once?
How can I track the performance of my WhatsApp messages?
Can I integrate WhatsApp Business API with my existing systems?
What should I do if my WhatsApp Business API account gets banned?
Does SMSGatewayCenter support two-way communication on WhatsApp?
How can I avoid getting banned from WhatsApp Business API?
What is the 24-hour Customer Care Window, and how does it work?
How do I create and use message templates for WhatsApp?
Can I send rich media like images or PDFs through WhatsApp?
Does SMSGatewayCenter support WhatsApp chatbots?
Can I send messages in multiple languages?
Can I send personalized messages to my customers?
Can I automate messages with the WhatsApp Business API?
What types of messages can I send using the WhatsApp Business API?
Do I need a verified business profile to use the WhatsApp Business API?
What’s the difference between the WhatsApp Business API and the WhatsApp Business App?
How do I sign up for WhatsApp Business API with SMSGatewayCenter?
What is the WhatsApp Business API, and how does SMSGatewayCenter support it?
Agents Chat
Default Response
Marketing Messages Lite API
Media Library
Template Messages
WhatsApp Flows
Troubleshoot
Workflow Builder

Web Chat Widget

19

Behavior, Voice, Security & Schedule
Getting Started
Limits & Analytics
- How do I track widget performance?
- Are there limits on widgets, storage, or visitor volume?
Routing
Troubleshooting
- Can I have a widget route to a bot for most hours and to a human for others?
- My widget is not appearing on my website. What should I check?
Widget Types & Appearance

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SMS Gateway Center

SMS Gateway Center is an experienced provider of Bulk SMS, Voice Call, and WhatsApp Business API solutions, allowing businesses to focus on servicing their customers. With years of experience in messaging technology, we serve various industries and guarantee exceptional technology enabled messaging services.

We provide unrivaled scalability, security, and delivery speed on our platform which is unmatched across the industry. Work with us to improve customer engagement, optimize communications, and rocket your marketing initiatives.

Your communication, simplified.

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Contact us:

Popular SoftTech & Marketing Pvt Ltd.

Address:

225 & 226, Ground Floor, Raghuleela Mega Mall, Behind Pohisar Bus Depot, Kandivali West,

Mumbai - 400067, Maharashtra,

India

Phone:

+912228657726

+91-9930 447 726

+91-9619 141 191

Fax:

+912231413083

E-Mail:

neha @ smsgatewaycenter[dot]com

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