Bulk SMS, WhatsApp, RCS & AI Agents, built for teams that need capability, not just cheap SMS
One DLT-compliant platform for Bulk SMS, WhatsApp Business API, RCS, Voice, Telegram, a no-code AI Agent Builder, and an embeddable Web Chat Widget, with real developer APIs, webhooks, and enterprise customization behind every channel, backed by hands-on local support.
Nine live products, and two more on the way
Every card below links to a real product page with full documentation, pricing, and setup guides. Coming-soon products are shown so you can plan ahead.
Bulk SMS Services
Transactional, OTP, promotional, and service SMS with DLT-registered routing and built-in DND filtering.
Explore Bulk SMSWhatsApp Business API
Official API access with template messaging, chatbot flows, rich media, and agent handoff on one WhatsApp number.
Explore WhatsApp APIRCS Messaging
Rich, interactive messages with images, quick-reply buttons, and a verified branded sender profile.
Explore RCS MessagingAI Agent Builder
No-code AI agents trained on your knowledge base, deployed to WhatsApp, RCS, SMS, Telegram, and web chat.
Explore AI Agent BuilderWeb Chat Widget
Embeddable website chat routed to your AI agent, a WhatsApp Workflow, Journey Builder, or Direct WhatsApp.
Explore Web Chat WidgetMulti-Channel Fallback
Automatically retry OTPs and alerts on WhatsApp or RCS when SMS fails, with variable mapping and full delivery history.
Explore FallbackVoice Calling Solutions
Automated outbound voice campaigns plus free missed-call-alert numbers for high-response lead capture.
Explore Voice ServicesTwo-Way SMS & Long Code
Dedicated and shared long codes for two-way conversations, keyword auto-replies, and inbound campaign tracking.
Explore Long Code SMSBulk Telegram Messaging
Reach schools, communities, and customer groups directly on Telegram, an affordable channel for group alerts.
Explore Telegram MessagingUnified Journey Builder
Design multi-step, multi-channel customer journeys (SMS, WhatsApp, RCS, Voice) visually, with branching logic and triggers, one build for every channel.
Get notified at launchUnified Chat
One shared inbox for SMS, WhatsApp, RCS, Telegram, and Web Chat conversations, with team assignment, so no channel is checked separately again.
Get notified at launchIntegrated OTP Service: generate and verify OTPs via API
Secure one-time-password verification for logins, transactions, and sign-ups, without building your own OTP logic.
- Generate: Call the API to create and send a time-bound OTP over SMS (or WhatsApp as a fallback channel).
- Verify: Call the verify endpoint with the code the user enters; SMSGatewayCenter checks validity and expiry for you, no need to store or compare OTPs yourself.
- Resend & expire: Configurable retry limits, expiry windows, and resend cooldowns to prevent abuse.
- Reporting: Full delivery and verification logs for every OTP sent, for audit and support.
A capable platform first, an affordable one second
We are often searched for as the budget-friendly option with strong local support, and we are that. But capability comes first: real developer APIs, AI agents, workflow automation, and enterprise customization on every channel.
| Capability | SMSGatewayCenter |
|---|---|
| Full REST API with webhooks for every channel | Included, with documentation and sandbox |
| No-code AI Agent Builder (OpenAI, Azure OpenAI, Anthropic, Gemini) | Included across WhatsApp, RCS, SMS, Telegram, Web Chat |
| Multi-channel automatic failover (SMS → WhatsApp → RCS) | Included, with variable mapping and delivery history |
| Self-serve onboarding with free demo credits | Sign up and test without a sales call |
| Custom enterprise integrations (CRM, ERP, webhooks) | Built by our team on request |
| 24/7 local support in India | Phone, WhatsApp, and email, always on |
One API, every channel
Send SMS, WhatsApp, RCS, and Voice from the same authentication and the same delivery-report format. Webhooks for inbound messages, DLR callbacks, and AI agent events plug straight into your stack.
Full parameter reference, plus WhatsApp, RCS, and Voice API calls, are in the Developer API docs.
Built for how your industry actually communicates
Every industry page covers real use cases, example messages, and DLT-category guidance, not generic copy.
Knowledge Base
Step-by-step setup guides for every product, from DLT registration to AI Agent Builder.
Browse GuidesCase Studies
Real results from businesses using SMSGatewayCenter's SMS, WhatsApp, and Voice products.
Read Case StudiesPricing
Transparent per-message pricing across SMS, WhatsApp, RCS, and Voice, no hidden fees.
View PricingIntegrations
Connect to CRMs, e-commerce, and automation tools like Zapier, Pabbly, Zoho Flow, and Shopify.
Explore IntegrationsSatisfied Clients
World's Popular Brands are some of our satisfied clients.
At SMS Gateway Center, we strongly believe no client is too big nor too small
to work with us to obtain good advantage.
Frequently Asked Questions
Bulk SMS, WhatsApp Business API, RCS Messaging, Voice Calling (OBD), Two-Way SMS/Long Code, Bulk Telegram Messaging, Multi-Channel Fallback, an AI Agent Builder, and a Web Chat Widget, all DLT-compliant and API-accessible. Unified Journey Builder and Unified Chat are launching soon.
Both. Self-serve customers get instant sandbox access and free demo credits, while teams that need custom integrations get full REST APIs, webhooks, and enterprise-grade customization behind every channel.
A no-code platform for building custom AI agents deployed to WhatsApp, RCS, SMS, Telegram, and web chat. It supports OpenAI, Azure OpenAI, Anthropic, and Google Gemini models, with knowledge-base training, safety guardrails, and human handoff.
Automatic failover across SMS, WhatsApp, and RCS for critical OTPs and alerts. If the first channel fails to deliver, the next channel in your sequence is tried automatically using its own approved template.
Yes, with the Web Chat Widget. Choose from seven widget styles and route conversations to an AI Agent Builder bot, a WhatsApp Workflow, Journey Builder, or Direct WhatsApp.
Yes. All commercial SMS to Indian numbers requires a registered header and approved content template under TRAI DLT rules. We provide guided DLT registration support for every customer.
Unified Journey Builder lets you design multi-channel customer journeys visually across SMS, WhatsApp, RCS, and Voice. Unified Chat is a single shared inbox for every channel. Both are launching soon; contact us to be notified.
Sign up for free, complete DLT registration with our guidance, choose the channels and products you need, and start sending. Talk to Sales if you want a demo or a custom integration first.
Why do Great Businesses Trust SMS Gateway Center?
Get in touch!
We would like to hear from you.
Address
225 & 226, Ground Floor, Raghuleela Mega Mall, Behind Pohisar Bus Depot, Kandivali West, Mumbai, 400067
Call for solutions!
+91-9930 447 726
Say hi to experts!
contact @ smsgatewaycenter[dot]com
Open Hours:
Mon-Sat: 10AM - 7PM