Integrate SMS, Email and
Voice API in your software

Build global customer engagement products with our developer-friendly communication APIs.


Dynamic, without any modification in code.

Dedicated routes for promotional and transactional SMS.

Send in English, deliver in Español, ಕನ್ನಡ, française…


Dynamic template building.

Reporting dashboard.

Reliable delivery and scale to enterprise volume.


Voice your messages, talk to your customers anywhere.

Code and customize your calls.

Make, manage and route calls to your phone, application or website.

Developer-Friendly APIs

From developers, for developers!

Robust, responsive, secure, scalable APIs to develop
best-in-market product.


APIs catering users to globally over 800 networks and 190 countries.

Integrate anywhere, deliver across the world.


Automate your communication product
Enable Smart messaging into your application Build communication products that talk to your customers
Make it scalable as and when required

Build awesome

Enable smart messaging into your application to automate your product.
Build communication products that talk to your customers. Make it scalable as and when required.

Let your communication FLOW


Completes the communication. Let us tell you how?

Engineered for reliability.

Multi-route technology to deliver your messages anywhere, anytime, anyhow.

Flow can be configured at your end!

Modify and play around your needs.

Communication API allows you to communicate
while Flow guarantees it!

Flexible pricing

  • Transactional notifications with fast & reliable delivery network
  • Verify accounts, protect logins with OTP
  • Personalised marketing
0.18 /SMS
*Min balance : 100 USD
  • Real-time email traffic monitoring
  • Quick integration via API or SMTP
  • No volume commitment
$40 per 100K email.
$0.0004 per email.
To know exact price for your account, login and click on buy.

Pre-built Templates

Hassle-free flow structure to communicate, just import and start using!

SMS - Voice - Email

Push Notifications - SMS

SMS - WhatsApp - Voice

5 minute setup

Be our partner and build a plugin for everyone

Integrate SMS, Voice, Email add-ons in your software to offer effective
communication for your customers.


With a single API, Flow allows you to quickly and easily communicate with your customers across different channels while spending minimal development resources. 

Benefits include:

Additional security of your account

Real-time content changes 

Easy to pause your campaign

Add multiple channels

Easy stoppable- What if you want to pause a particular SMS for a certain duration?

The flow can be paused anytime in case if you wish to stop the campaign for any reason.

More channels - What if you want to add voice as backup or replace SMS to whatsapp. It is not just a few clicks.

Flow API is the same as One API. All you need to do is trigger the API. 

  1. Login to your MSG91 account. 
  2. Click on the option of ‘Flow and API’ on the Dashboard and open API documentation using the API Documentation button.

Unlike a mobile network service provider, an SMS service provider is a communications platform for business that acts as an intermediary between the SMS service users and mobile network service providers.

They are business organizations that partake in contracts with several mobile network companies to send and receive SMS using their mobile networks.

SMS service providers have a platform that businesses and individuals can use to send promotional and informational messages while also supporting more powerful features for interaction. They are also known as SMS gateway providers, SMS brokers or re-sellers because they provide a gateway to their customers/clients to send and route messages to a different gateway or SMSC. They also provide the feature of buying cheap wireless messages in bulk from carriers and selling them at higher prices.

Sending automated SMS can be done in 5 easy steps using a communications platform for business by an SMS service provider as follows:


  • Sign up and choose an SMS plan from your preferred SMS service provider like MSG91. 
  • Upload your contact list or bulk contacts database.
  • Create a keyword or form campaign to build a text marketing list by getting responses as consent to continue sending automated messages to receivers.
  • Draft your automated SMS as per your requirement and preview it accordingly. You can also use templates, personalized tokens to display the first name of the recipient.
  • Schedule your draft SMS and send it to your contacts, sublists and groups as an when you prefer.



Yes, there is an API for WhatsApp that serves as a means for software developers to integrate the platform with multiple customer touchpoints online. A detailed WhatsApp API documentation is also available for developers to help them create engaging messaging experiences for businesses and customers.

A voice API is used by software developers as a tool for communication platforms for businesses to make and receive voice calls using a simple and user-friendly API. In the technical background, voice API connects Public Switched Telephone Network with internet applications. This tool enables the developers to integrate voice calls within their applications without having any specific knowledge about telecommunications hardware.

With developer-friendly voice API, software developers can create a call logic that can be used on any device at any location around the globe using full VoIP functionality using only the internet.

You can opt for a quick SMS API service sign-up to facilitate sending and receiving SMS from any CRM, website, or applications using an SMS API provider like MSG91. This will help you to get SMS service APIs with several sample codes in various programming languages including Java, .NET, PHP and others.

Simply visit MSG91’s website and personalize the SMS API as per your requirement, at extremely affordable prices for your business. Once you have set up your account for the cloud communication platform, you will be able to send and receive messages in various forms and track the status of your messages in real-time.

An Email API lets businesses harness the complete power of Email as a communication medium. It is a piece of code that integrates with an Email service provider and lets business and marketing teams send bulk-emails, schedule emails to be sent at a specified time, incorporate powerful analytics to understand metrics like number of emails opened, embedded links clicked, view time, etc.