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Messaging API

Seamless Conversational messaging

Connect and engage with your global customers using SMS, MMS, email, RCS, WhatsApp, and Viber, all via a single, user-friendly API.

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  • Personalized customer experiences
  • Global scale
  • Omnichannel conversations

Provide an effortless omnichannel customer journey

Simplify the integration of your customer’s preferred channels into your website and application. Telesign’s omnichannel Messaging API streamlines the creation of a robust global messaging infrastructure.

Save time and resources

Eliminate redundant development efforts and achieve scalable growth with a single, unified API.

Reach and reliability

Reach more customers on more channels to effectively scale your business.

Build flexible, personalized workflows

Create personalized workflows by automating omnichannel conversations, marketing, alerts, and more.

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One API, many channels

Unlock scalable growth by streamlining operations with a unified communication API. Embrace agility and reach customers on their preferred channels. Seamlessly communicate via SMS, MMS, email, RCS, WhatsApp, and Viber. Select from one or all six channels to efficiently expand your programmable messaging strategy.

Intelligent and premium routing solutions

Telesign's Messaging API uses intelligent routing to optimize path selection, enhancing the potential for swift and dependable message delivery. You can trust that your outbound messages will match the pace of your business with unwavering confidence.

Ensure redundancy with omnichannel waterfall delivery

Rely on best-in-class deliverability. Telesign utilizes a waterfall methodology, incorporating dynamic routing to guarantee the successful delivery of each message. In the event of any delivery issues, it swiftly redirects the communication through an alternate carrier route or switches to an alternative channel.

Engaging and tailored experiences

Craft unforgettable interactions from the start. Use rich media messaging features including images, files, and CTA buttons, combined with intelligent personalization capabilities, to foster genuine customer connections just one message away.

Engagement for every interaction

Deliver fast, effortless, secure, and adaptable communication throughout the entire customer journey, encompassing tasks such as account creation, notifications, reminders, to promotions, campaigns, and customer support.

‍Get started with multiple channels and a few lines of code

Our easy-to-use Messaging API and in-depth documentation makes it quick and easy to start messaging your customers.

curl --request POST \
     --url \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '
     "channels": [
               "fallback_time": 300,
               "channel": "whatsapp"
               "channel": "sms"
     "message": {
          "default": {
               "parameters": {
                    "text": "Hello world!"
               "template": "text"
     "phone_number": "15558675309"

Engage with customers on their trusted channels

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Enables platforms to build communications and account security SMS messaging into web and mobile applications.

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Power personalized conversations that transform the way you connect with your customers using your WhatsApp Business account.

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Provide timely, personalized communication through MMS-based alerts, notifications, one-time-passcodes (OTPs), and other automated messages.

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Deliver rich, personalized experiences and guarantee the delivery of important alerts, reminders, and notifications via Viber for Business.

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Build enriched mobile messaging and ease friction at all stages of the customer journey through multi-media support, live chats, and secured communication.



Send relevant and engaging content directly to your audience's inbox, ensuring your messages are delivered.


What is omnichannel messaging?

The ability to send and receive messages across different platforms, channels, and devices. This includes SMS, MMS, email, RCS, Viber and WhatsApp, and Facebook Messenger.

What are some of the benefits of omnichannel messaging?

Provide a more seamless customer experience: Communicate with customers through their preferred channels, leading to increased customer satisfaction and loyalty.Improve Efficiency: Reduce the need to repeat the same information multiple times.Increased sales and revenue: Customers are more likely to make a purchase when messaging is available across all channels.

How is omnichannel used to increase awareness?

By distributing the same message through multiple channels simultaneously. This can help to ensure that the message reaches as many people as possible. Creating a more unified brand experience for customers.

How does omnichannel messaging create a positive customer experience?

Provide a consistent customer experience across channels, ensuring that customer data is shared seamlessly between channels, and managing inventory and order fulfillment across different channels.