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Bulk SMS & OTP Gateway for Business

Send transactional, promotional and OTP SMS to customers across India and worldwide. DLT-compliant, fast and backed by real-time delivery reports.

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  • Secure & Reliable
  • API & SDKs
  • 24×7 Support

Key features

Everything you need to run SMS at scale.

Fast OTP delivery

Priority routes for one-time passwords and login codes, so customers are never left waiting.

DLT compliant

Register headers and templates with our help and send only approved content on Indian networks.

Unicode & regional languages

Send messages in Hindi, Tamil, Bengali and other Indian languages.

Scheduling & personalisation

Schedule campaigns and insert names, amounts or dates for every contact.

Short links & click tracking

Shorten URLs and see who clicked, right inside your campaign report.

Real-time delivery reports

Track sent, delivered and failed status per message, with webhooks for your systems.

How it works

Go live in three simple steps.

  1. Register your sender ID

    Complete KYC and register your header and templates on the DLT portal with our team's help.

  2. Connect or upload

    Use the REST API or SMPP, or upload contacts from Excel in the dashboard.

  3. Send and track

    Send instantly or schedule, then monitor delivery in real time.

Popular use cases

OTP & two-factor login

Verify users at sign-up, login and payment.

Transaction alerts

Bank debits, credits, bill payments and balance updates.

Order & delivery updates

Order confirmations, dispatch and out-for-delivery alerts.

Promotions & offers

Festive offers and loyalty campaigns to opted-in customers.

For developers

Integrate in minutes

Use the TalkNest REST API, SDKs and webhooks to send messages from your app, website or CRM. Test safely with sandbox keys before going live.

  • REST API with clear documentation
  • SDKs for Node.js, Python, PHP and Java
  • Real-time delivery webhooks
Read the API docs
Example request202 Accepted
POST /v1/messages
{
  "channel": "sms",
  "to": "+91XXXXXXXXXX",
  "sender_id": "TLKNST",
  "template_id": "DLT_TEMPLATE_ID",
  "text": "Your OTP is 482916. Valid for 5 minutes."
}

Frequently asked questions

What types of SMS can I send?

You can send transactional SMS (alerts and updates), service SMS, OTP messages and promotional SMS to opted-in customers, in line with TRAI regulations.

Do you help with DLT registration?

Yes. Our onboarding team guides you through entity, header (sender ID) and template registration on the DLT platform.

Can I send SMS in Indian languages?

Yes. TalkNest supports Unicode SMS, so you can send messages in Hindi and other regional languages.

How do I integrate SMS with my application?

Use our REST API, SMPP connection or ready-made plugins. Delivery reports are sent to your webhook in real time.

Works great with

RCS Business Messaging

Rich, interactive messaging with a brand-verified experience.

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WhatsApp Business API

Engage customers on the world's most popular messaging platform.

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Voice, IVR & Cloud Telephony

Build stronger connections with reliable and scalable voice solutions.

Learn More

Ready to Power Your Customer Communication?

Join thousands of businesses already growing with TalkNest.

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