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…

Send automated SMS.


Best email API service to add to the uninterrupted omnichannel experience.

Dynamic template building.

Reporting dashboard for viewing and analyzing data.

Reliable delivery and scale to enterprise volume.


Talk to your customers anywhere and keep track of conversations.

Code and customize your calls.

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

Analyze customer data and improve the calling experience with our Voice API.

Developer-Friendly APIs

From developers, for developers!

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


APIs catering to 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

Use One API to integrate SMS, email, voice APIs, WhatsApp and more in your communication software. The platform allows you to configure your flow of communication with the help of omnichannel experience provided by One API, to ensure guaranteed and smooth delivery of the message to your customers.

For instance, you send an email to a potential customer, and they fail to open the email. You can then follow your email with an SMS and later a push notification – this way you’ll ensure your message reaches your consumers – in an automated and seamless way.


Completes the communication flow. Let us tell you how?

Engineered for reliability
This comprehensive solution guarantees automated delivery of messages through an omnichannel approach.

Multi-route technology 
This integrated solution delivers your messages anywhere, anytime, anyhow.

Flow can be configured at your end!

Modify, customize and play around your needs.

Communication API allows you to communicate
while One API guarantees it!

Flexible pricing

A robust solution with simple usage-based pricing. MSG91 offers fair & flexible pricing for channels you use according to your business requirement. Check out our plans now!

0.18 /SMS
*Min balance : 100 USD
$40 per 100K email.
$0.0004 per email.
To know exact price for your account, login and click on buy.

Pre-built Templates

Helping you save time and effort, our solution even offers you pre-built templates for your communication needs.
Hassle-free flow structure to communicate, just import and start using!

SMS - Voice - Email

Push Notifications - SMS

SMS - WhatsApp - Voice

5 minute setup

Now integrate all your communication channels to form a seamless flow using a single API. MSG91 One API
enables you to deliver an excellent omnichannel experience to your customers with an uninterrupted
flow of communication. The setup is easy and takes only 5 minutes.

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.


One API is a single integrated API of multiple communication channel APIs developed by MSG91. One API integrates SMS API, voice API and email API to enable a consistent and uninterrupted flow of communication between your business and your customers. With a single API, MSG91’s One API allows you to quickly and easily communicate with your customers across different channels while spending minimal development resources as One API can be seamlessly integrated in your software.

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.

Design communication flow - What if you want to add voice as a backup or replace your SMS API with WhatsApp API. MSG91’s OneAPI enables you to customize and configure your own communication flow template as per your requirement.

Global communication - One API can be integrated with software across the globe and has been currently serving 800 networks and 190 countries globally.

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.

SMS service providers are business organizations that partake in contracts with several mobile network companies to send and receive SMS using their mobile networks. SMS service providers are business entities that act as an intermediary between mobile network operators and users of the SMS users.

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 an SMS API provider for business :

  • 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. WhatsApp API facilitates medium and large businesses to enable seamless communication with customers globally. 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. MSG91’s voice API lets you code and customize your calls as per your requirements and route the calls to your phone, application or website.

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.

With an Email API, businesses can 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 emails, schedule emails to be sent at a specified time, incorporate powerful analytics to understand metrics like the number of emails opened, embedded links clicked, view time, etc.

MSG91 offers you the best email API service platform that enables you to build and draft your own dynamic email templates, get access to reporting dashboard for email analytics and ensures scheduled and immediate email delivery at an enterprise-level volume scale.


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