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Programmable SMS

Send text messages globally with the powerful and robust Transactional SMS API.

Global SMS messaging to the next level

Send critical information, notifications & updates with robust
SMS APIs and reach your users globally. Bring on the conversational experiences to life
and nurture the relations that matter to your business.

DO more with SMS

SMS in Regional Language

Connect with your customers in their native language so that they don’t miss out on important updates, and act faster.

Verified SMS

With Verified SMS build trust by adding your brand name and business logo along with the verified status to all your business messages.


Upgrade the messaging with popular chat features like multimedia sharing, group chats, sharing location, sending documents and files and many more

Choose the Language code you master

Access free SMS APIs with sample codes in 10+ languages including PHP, Java, .NET & more.
Select your prefered language code from our API documentation and start communicating with your customers.

Flow is the new way to send SMS

Flow unifies communication channels with a single API, allowing you to
quickly and easily communicate across SMS, call, email and
WhatsApp while spending minimal development resources

Key features that make MSG91 a trusted Transactional SMS provider

Use MSG91 API and its programmable features to enable premium and rich interactive conversational experience for business workflow.

DND Allowed

You may send transactional SMS on DND option data.

Delivery Report

Check confirmation of each sent SMS in SMS Delivery report.

Send SMS 24×7

Unlike promotional SMS,Transactional SMS can be sent 24×7 with your sender ID.

Free API Integration

Integrate SMS API in your software, pay only for what you use.

Trusted high grade platform
backed by constant support


The leading transactional SMS providers in India; we deliver SLAs with 99.9% uptime and reliability guarantee.


Our platform is ISO 27001:2013 certified. We follow all strict processes and policies to keep control on fraud and spamming activities.


18*7 availability to actively monitor the performances all the time.


Ask us anything!

Transactional SMS service can be used by businesses to send important and essential messages about their product or service to their customer in bulk. Updates regarding Delivery Status, Invoice & Refund Status, which are important communications for an e-commerce site, all can be done seamlessly through transactional SMS to customers.


A transactional message differs from a promotional message. Promotional messages can’t bypass a DND setting on a receiver’s mobile. However, when a transactional route is enabled by a company who wishes to send non-promotional messages, the transactional SMS service provider can send it to both DND and non-DND customers during any time of day, and it does not require prior approval from the receiver.

Any message that is treated as a piece of essential information and is not for marketing purposes is regarded as a transactional message. When an organisation needs to send transactional texts, these texts are treated as unrestricted and important information to their list of contacts. It could be a room booking confirmation sent by a travel agency, or a flight ticket booking confirmation by an airline company. Even educational institutions can send transactional messages in the form of admission statuses and examination date updates.

The sole purpose of a transactional SMS gateway is to authenticate the sending and receiving of a message. The gateway can figure out the receiver’s network provider and transmits a message directly to said provider. It will also receive a confirmation from the provider whether the message has been delivered to the recipient.

The process of enabling transactional messages is pretty straightforward – register with us by sending the documents pertaining to your business and other permits. We will then offer you a package deal that is best suited for your needs. After your account has been set up, you can complete other necessities like listing the details of your customer contacts and create the transactional SMS templates. MSG91 provides the best transactional SMS service in India with a very streamlined and simple interface that makes sending transactional messages easy.

There are 2 key differences:

  • Promotional SMS are sent for marketing purposes, while transactional messages are action or update oriented
  • Transactional messages can be sent to both DND and non-DND numbers without prior permission, while promotional messages can only be sent to non- DND numbers.