Best Bulk SMS Service Provider in India with High-Delivery SMS APIs | Siratel

Bulk SMS is no longer a marketing add-on. For modern businesses, it is core infrastructure.

OTP failures break logins. Delayed transactional SMS cause customer churn. Non-compliant routes invite regulatory risk.

That’s why choosing the right bulk SMS service provider in India is not about price or free credits. It’s about delivery certainty, scale, compliance, and global reach.

Siratel Communications is built for businesses that cannot afford message failure in India and across international markets.

What Is Bulk SMS? 

Bulk SMS is the ability to send a large number of text messages simultaneously to customers using a centralized SMS gateway or API.

Common uses of bulk SMS

• OTP and authentication

• Banking and payment alerts

• Order and delivery updates

• Appointment reminders

• Bulk Promotional SMS campaigns

• SMS notifications Service

Unlike email or app notifications, SMS:

• Works without internet

• Reaches every mobile phone

• Is read almost instantly

That reliability is why enterprises still depend on SMS.

Why Bulk SMS Still Works in 2026

Here’s what the data consistently shows:

• 98% open rate for SMS

• Most messages are read within 3 minutes

• No dependency on apps or algorithms

• Works on smartphones and feature phones

For time-sensitive communication, SMS is still unmatched.

This is especially critical for:

• Fintech and NBFCs

• Healthcare platforms

• E-commerce at scale

• Logistics and mobility companies

• Global SaaS products

Why Choosing the Right Bulk SMS Service Provider in India Matters

Many businesses make the mistake of choosing an SMS provider based on:

• Lowest price per SMS

• Free credits

• “Cheapest bulk SMS” claims

That approach works only until:

• OTPs start failing during peak load

• DLT compliance breaks delivery

• International routes get blocked

• Delivery reports stop matching reality

A true bulk SMS service provider in India must offer telecom-grade infrastructure, not just a web panel.

Introducing Siratel: Enterprise-Grade Bulk SMS Infrastructure

Siratel Communications is a telecom-first CPaaS provider, built to handle high-volume, high-reliability messaging for enterprises in India and globally.

Siratel at a glance

• 3+ billion messages processed every month

• 1,700+ TPS (transactions per second) throughput

• 99.99% platform uptime

• Tier-1 global telecom operator partnerships

• ISO 9001:2015 certified infrastructure

• 24×7 enterprise support

Siratel is not only a low-cost SMS reseller. It is a messaging infrastructure.

Types of Bulk SMS Services Offered by Siratel

1. Transactional SMS (DLT-Compliant)

Used for critical communication:

• OTPs

• Login verification

• Payment alerts

• Order confirmations

• Service notifications

Siratel advantage

• Priority operator routes

• Delivery even on DND numbers

• Ultra-low latency

• High concurrency handling

Learn more about – Transactional SMS Service

2. Promotional SMS

Used for:

• Offers and discounts

• Campaign announcements

• Customer re-engagement

Siratel advantage

• Clean, verified routes only

• Smart campaign scheduling

• Accurate delivery reporting

• No grey or tunnel routing

Learn more about – Promotional SMS Service

3. OTP SMS & API Messaging

Siratel provides secure REST and SMPP APIs for automated messaging.

How does it work?

• Your system triggers an API call

• Siratel routes the message via the best operator path

• Delivery status is returned in real time

This is essential for:

• Fintech

• SaaS

• Marketplaces

• Healthcare apps

Bulk SMS Technical Terms Explained

Siratel will provide full documentation for both technical and non-technical teams.

DLT Compliance in India (Handled by Siratel)

What is DLT?

DLT (Distributed Ledger Technology) is mandated by TRAI to prevent SMS spam in India.

What DLT requires

• Business entity registration

• Sender ID approval

• Template approval

• Campaign validation

How Siratel helps

• End-to-end DLT onboarding

• Template creation guidance

• Real-time scrubbing

• Zero delivery surprises

Compliance is not optional. Siratel makes it frictionless.

Why India Is a Global Hub for Bulk SMS Services

India has become the preferred base for global SMS operations due to:

• Massive telecom scale

• Cost-efficient operator routing

• Mature compliance systems

• Engineering-driven platforms

Siratel leverages this strength to support international messaging from India.

Siratel’s Global Bulk SMS Coverage

Siratel supports enterprises operating across borders with direct international SMS routes.

Countries served by Siratel

Each region has different delivery behavior and regulations. Siratel manages routing and compliance country-wise.

If you are in India you can also explore our bulk sms services in delhi

Bulk SMS vs WhatsApp vs Email (Quick Comparison)

When delivery certainty matters, SMS wins.

How Siratel Is Different From Other Bulk SMS Providers in India

Most competitors fall into one of these categories:

• Cheap SMS platforms

• OTP-only providers

• Add-on SMS tools inside voice platforms

• Affiliate-driven listicles

Siratel is different.

What Siratel does

• Operator-grade routing

• SLA-driven performance

• Transparent delivery data

• Scalable architecture

• Enterprise onboarding

Industries Using Siratel Bulk SMS Solutions

Siratel supports businesses where SMS is mission-critical.

Industry use cases

• Fintech & NBFCs: OTPs, transaction alerts

• Restaurants: Events & Experiences, Loyalty & Repeat Visits

• Healthcare: Appointments, reports, reminders

• E-commerce: Order updates, COD verification

• Education: Exams, admissions, alerts

• Logistics: Shipment tracking

• Real Estate: Lead follow-ups

Each industry requires reliability, speed, and trust.

Bulk SMS Pricing: What Enterprises Should Understand

Pricing depends on:

• Message volume

• Route quality

• Delivery priority

• Country

• Compliance requirements

Indicative structure

Contact Siratel for custom pricing for high-volume and enterprise clients.

How to Choose the Best Bulk SMS Service Provider in India

Before deciding, ask these questions:

• Do they disclose TPS capacity?

• Are routes direct to operators?

• Is DLT fully managed?

• Do delivery reports match reality?

• Can they handle traffic spikes?

• Do they support international messaging?

• Is uptime measured and guaranteed?

If these answers are unclear, that’s a risk.

Conclusion: Messaging That Businesses Can Rely On

If your business depends on:

• OTP reliability

• Real-time alerts

• Global communication

• Regulatory safety

• Scalable infrastructure

Then you don’t need the cheapest SMS provider. You need a reliable bulk SMS service provider in India built for scale.

Siratel delivers exactly that.

Talk to Siratel. Test real routes. Scale with confidence.