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Developer-Friendly Omnichannel APIs

Powerful Messaging Solutions For Fast-Growing Businesses star

Connect With Your Customers Globally Across SMS, WhatsApp Business, And High-Deliverability Email Through A Single Unified API Platform.

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SMS API Solution

High Speed

Lightning-fast Transactional SMS, Instant OTP Delivery, DLT-compliant Routing, And Multi-operator Failover Protection.

  • Sub-3 Second Global OTP Delivery
  • TRAI & DLT Template Integration
  • Real-Time Webhook Status Callbacks
  • Smart Multi-Gateway Dynamic Routing
Explore SMS API

Whatsapp Cloud API

Meta V25+ Ready

Engage 2.5B+ Active Users With Official WhatsApp Business Cloud API. Send Media Templates, Rich CTAs, And Automated Chatbots.

  • Official Meta Cloud API Infrastructure
  • Interactive Buttons, Media & Catalogs
  • Green Tick Verification Support
  • Automated Two-Way Chatbot Workflows
Explore WhatsApp API
Global Infrastructure

Empowering Modern Enterprises With Reliable Messaging

High-throughput Communication Infrastructure Engineered For Peak Traffic And Real-time Delivery.

50M+

Messages Delivered

99.99%

Platform SLA Uptime

API Response Latency

5,000+

Enterprise Customers

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Customer Success & Reviews

Trusted By 5,000+ Fast-Growing Businesses star

5.0 / 5.0

SimSys Messager Has Transformed Our Customer Authentication Pipeline. Our OTP Delivery Latency Dropped Below 2 Seconds And SMS Failure Rates Reduced To Nearly Zero.

A
Aarav Mehta
CTO, FinEdge Payments
5.0 / 5.0

The WhatsApp Cloud API Automation And Rich Media Templates Helped Us Achieve A 48% Boost In Cart Recovery Rates. Outstanding Developer Support And 100% Uptime SLA.

P
Priya Sharma
VP Of Growth, ShopZen Global
5.0 / 5.0

Clean API Documentation, Flexible Credit Plans, And Seamless Payment Gateway Compliance Made Integration A Breeze. Highly Recommended For Enterprise Messaging.

R
Rahul Verma
Head Of Engineering, LogiTech Solutions
Why Fast-Growing Companies Choose SimSys

Built For High Scale, Speed & Maximum Inbox Deliverability

01
99.99% Delivery SLA

Redundant Multi-carrier Routes Ensuring Mission-critical SMS, OTP, And WhatsApp Notifications Arrive Without Delay.

02
Instant Sub-5 Min Setup

Modern Developer-friendly REST APIs With Comprehensive SDKs For Python, Node.js, PHP, And CURL.

03
DLT & Meta Partner Approved

Seamless TRAI DLT Compliance And Official WhatsApp Cloud API V25+ Infrastructure With Verified Green Tick Support.

04
Real-Time Webhooks & Insights

Instant Delivery Receipts, Open/click Rate Tracking, And Automated Suppression List Filters.

Ready To Scale Your Messaging?

Join Thousands Of Developers And Businesses Today.

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Frequently Asked Questions

Everything You Need To Know About Our Messaging Platform star

  • Enterprise Uptime & Security

    99.99% SLA Availability With TLS 1.3 Encryption.

  • Developer-First REST API

    Comprehensive SDKs, Postman Collection & Code Samples.

  • Flexible Transparent Pricing

    Pay-as-you-go Or Monthly Plans With 7-day Refund Guarantee.

Our direct multi-carrier routes deliver OTP and transactional SMS in sub-3 seconds globally with 99.99% SLA uptime and real-time delivery receipts (DLR) via webhooks.

You can connect your Meta Business account in minutes, submit message templates for instant approval, and dispatch automated broadcasts, OTPs, or conversational chatbot messages.

Yes, our high-inbox deliverability infrastructure enforces custom domain authentication (SPF, DKIM, DMARC, BIMI) ensuring your marketing and transactional emails bypass spam filters.

We accept all major credit/debit cards, UPI, Net Banking, Razorpay, Stripe, and PayU. We provide a transparent 7-Day Money-Back Guarantee for all unused subscription and credit balances.

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More
Basic

This plan demonstrates the following rules

₹

99

/ 10 Days
Credits Included
50
Email
1,000
SMS
2,500
Whatsapp
Get Started
Most Popular
Premium

This plan demonstrates the following rules

₹

999

/ 30 Days
Credits Included
∞
Email
∞
SMS
100,000
Whatsapp
Get Started
Standard

This plan demonstrates the following rules

₹

499

/ 30 Days
Credits Included
5,000
Email
∞
SMS
5,000
Whatsapp
Get Started
100% Secure & Compliant Payment Processing

Trusted Payment Gateways & Enterprise Security

256-Bit SSL Encryption

End-to-end Data Security

PCI-DSS Level 1

Certified Payment Gateway Partners

7-Day Refund Policy

Transparent Refund & Cancellation

DLT & Meta Ready

100% Regulatory Compliant

Instant Account Activation Upon Successful Payment Confirmation. No Setup Fees Or Hidden Surcharges.

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Engineering & Growth Insights

Latest Articles & Messaging Guides star

All Posts
blog Jul 04, 2024

Measuring Success: Analytics and Insights for Effective Campaigns
blog Jul 04, 2024

Security Matters: Safeguarding Your Communication Channels
blog Jul 04, 2024

Personalization in Messaging: Crafting Relevant Customer Experiences