What Is Viber API and How Does It Work?

Business communication is shifting from email and SMS to messaging apps. Customers expect fast, interactive, and personalized conversations: directly in the apps they already use.

Viber is one of the leading messaging platforms in regions like Central and Eastern Europe, the Balkans, CIS countries, and the Middle East. For businesses operating in these markets, it has become a powerful customer communication channel.

What Is the Viber API?

So, what is the Viber API? The Viber API (also known as Viber Business API) allows companies to send secure, branded, and automated messages to customers inside the Viber app. It supports transactional messages like OTPs and delivery updates, promotional campaigns with rich media, and two-way customer support conversations.

Unlike regular app-to-app messaging, the Viber API is designed for enterprise use. It allows businesses to integrate Viber into their existing systems, such as CRMs, eCommerce platforms, customer support tools, and authentication services, through a programmable interface.

Personal Viber Messaging Vs. Viber Business Messaging

There is a clear difference between personal messaging and business communication on Viber.

Personal Viber accounts are intended for one-to-one conversations between users. Messages are sent manually, and profiles are tied to individual phone numbers.

The Viber Business API, on the other hand, is built for brands. It allows companies to:

• Send high volumes of messages simultaneously

• Use verified, branded sender profiles

• Automate communication through APIs and webhooks

• Track delivery and read receipts

• Launch promotional and transactional campaigns

Business accounts also go through an approval and verification process, strengthening trust and brand authenticity for end users.

Who Uses the Viber API?

The Viber API is widely used by businesses that need fast, reliable, and scalable customer communication.

Common industries include:

• eCommerce: order confirmations, shipping updates, promotions

• Fintech and banking: OTPs, fraud alerts, transaction notifications

• Retail brands: marketing campaigns and personalized offers

• Travel and logistics: booking confirmations and real-time updates

• Customer support teams: two-way conversations and chatbot automation

Any organization that needs secure, high-engagement messaging can benefit from the Viber API.

What Can You Do With the Viber API?

The Viber API gives businesses the ability to communicate with customers across the entire customer journey.

Here’s what companies typically use the Viber API for:

Transactional Messaging

Transactional messages are automated, time-sensitive notifications triggered by user actions or system events. These messages are critical for security, logistics, and customer experience.

With the Viber API, businesses can send:

• One-Time Passwords (OTPs) for login and verification

• Account alerts and security notifications

• Payment confirmations

• Booking confirmations

• Password reset messages

Because Viber supports branded sender IDs and rich formatting, these messages feel more secure and trustworthy than traditional SMS.

Businesses also use the Viber API for:

• Order confirmations

• Shipping and delivery updates

• Real-time status notifications

Delivery and read receipts allow companies to track whether customers have received and opened the message.

Promotional and Marketing Messages

Beyond transactional communication, the Viber API is a powerful marketing channel.

Unlike SMS, Viber supports rich media, including:

• Images and GIFs

• Videos

• Buttons and call-to-action links

• Carousels

• Branded messages

This makes it ideal for:

• Product launches

• Flash sales

• Seasonal campaigns

• Personalized offers

• Customer re-engagement campaigns

With high open rates compared to email, businesses can deliver promotional content directly inside a messaging app that customers already use daily.

Customer Support and Two-Way Messaging

The Viber API also enables two-way communication.

Customers can reply to messages, ask questions, and interact with brands in real time. This makes Viber suitable for:

• Live agent conversations

• Post-purchase support

• Appointment rescheduling

• Feedback collection

Businesses can integrate chatbots and automation tools to handle common questions instantly, while routing more complex issues to human agents.

This combination of automation and live support improves response times and reduces operational costs.

How Does the Viber API Work?

The Viber API works by connecting a business’s internal systems to Viber’s messaging infrastructure. Once integrated, companies can automatically send messages to customers, receive replies, and track engagement in real time.

Here’s how the process works step by step:

1. Business Registration and Approval

Before sending messages through the Viber API, a company must create and verify a Viber Business Account.

This includes:

• Submitting business details

• Providing brand information

• Setting up a branded sender profile

• Completing Viber’s approval process

Viber verifies businesses to ensure authenticity and prevent spam. Once approved, the company receives access credentials for API integration.

The branded sender profile is important because it allows businesses to send messages from a verified brand name instead of a random phone number. This increases trust and recognition among customers.

2. API Integration

After approval, the next step is integrating the Viber API with your platform.

Businesses connect the API to systems such as:

• CRM platforms

• eCommerce websites

• Banking systems

• Customer support tools

• Authentication services

Integration allows systems to automatically trigger messages. For example:

• A user logs in → an OTP is sent

• An order is placed → a confirmation message is triggered

• A shipment is dispatched → delivery updates are sent

Authentication keys are used to securely send message requests to Viber’s servers. The API handles formatting, routing, and message processing.

3. Message Delivery to End Users

Once a message request is sent via the API, Viber delivers it directly to the user’s Viber app.

If the user has Viber installed and is connected to the internet, the message appears instantly in their chat interface: just like a normal message from a contact.

Businesses can track:

• Delivery status

• Read receipts

• User replies

If the message is not delivered (for example, if the user doesn’t have Viber installed), some providers offer fallback options such as SMS to guarantee message completion.

This structured flow, registration, integration, and delivery allows businesses to communicate reliably and at scale.

The Viber API offers more than basic text messaging. It provides advanced features that help businesses create secure, engaging, and branded customer interactions.

Here are the key features that make Viber a powerful business messaging channel:

Rich Media Support

Unlike traditional SMS, the Viber API supports rich and interactive message formats.

Businesses can send:

• Images and GIFs

• Videos

• Clickable buttons with call-to-action links

• Carousels and product showcases

• Branded backgrounds and layouts

This makes Viber ideal for marketing campaigns, product promotions, and interactive customer journeys. Rich media not only improves engagement but also allows brands to deliver visually appealing messages directly inside the chat interface.

Branded Sender Profiles

With the Viber Business API, messages are sent from a verified brand profile rather than a random phone number.

Branded profiles can include:

• Company name

• Logo

• Brand colors

• Verified badge (where applicable)

This builds trust and helps customers instantly recognize the sender. In industries like fintech, banking, and eCommerce, branded messaging significantly reduces confusion and increases message credibility.

Read and Delivery Receipts

The Viber API provides real-time delivery tracking.

Businesses can see:

• Whether a message was delivered

• Whether it was opened (read status)

• When the user interacted with it

These insights allow companies to monitor campaign performance, confirm OTP delivery, and optimize communication strategies based on engagement data.

High Engagement and Open Rates

Messaging apps consistently outperform email in engagement. Messages sent via Viber typically achieve high open rates because they appear directly in a user’s primary communication app.

Unlike email inboxes that are often crowded, messaging apps offer a more direct and immediate channel. This makes Viber especially effective for time-sensitive notifications, security messages, and promotional campaigns.

End-to-End Encryption

Security is critical in business communication. Viber supports end-to-end encryption for messages, helping protect user data and sensitive information.

For industries such as banking, fintech, healthcare, and eCommerce, this added layer of security is essential when sending OTPs, account alerts, or transaction confirmations.

Using Viber API With Dexatel

While the Viber messaging API provides powerful business messaging capabilities, companies typically access it through an official messaging provider. This is where Dexatel simplifies the process.

Dexatel offers direct Viber API connectivity as part of a unified omnichannel communication platform, allowing businesses to manage multiple messaging channels through a single interface.

Here’s how Viber works within the Dexatel ecosystem:

Unified Omnichannel Messaging

With Dexatel, Viber is not a standalone channel. It operates alongside:

• SMS

• WhatsApp

• Telegram

• Other global messaging channels

Instead of integrating separate APIs for each platform, businesses use a single API and a centralized dashboard to manage all communication.

This means companies can:

• Send messages across multiple channels from one system

• Maintain consistent messaging logic

• Automate customer journeys across platforms

• Switch channels based on availability or performance

For example, if a customer prefers Viber in one region and WhatsApp in another, messaging logic can automatically adapt.

OTP and Authentication Messages

Security and authentication are among the most common Viber API use cases.

Through Dexatel, businesses can send secure one-time passwords (OTPs) and verification messages via Viber with branded sender profiles.

To guarantee maximum deliverability, Dexatel supports automatic fallback to SMS if:

• The user does not have Viber installed

• The message fails to deliver

• The device is offline

This guarantees that critical messages, such as login codes or transaction confirmations, always reach the end user.

Analytics and Reporting

Understanding performance is essential for optimizing communication.

Dexatel provides detailed analytics for Viber messages, including:

• Delivery rates

• Read rates

• Engagement metrics

• Campaign performance insights

With this data, businesses can measure effectiveness, improve timing, adjust targeting strategies, and maximize ROI.

Unified Omnichannel Messaging

With Dexatel, Viber is not a standalone channel. It operates alongside:

• SMS

• WhatsApp

• Telegram

• Other global messaging channels

Instead of integrating separate APIs for each platform, businesses use a single API and a centralized dashboard to manage all communication.

This means companies can:

• Send messages across multiple channels from one system

• Maintain consistent messaging logic

• Automate customer journeys across platforms

• Switch channels based on availability or performance

For example, if a customer prefers Viber in one region and WhatsApp in another, messaging logic can automatically adapt.

OTP and Authentication Messages

Security and authentication are among the most common Viber API use cases.

Through Dexatel, businesses can send secure one-time passwords (OTPs) and verification messages via Viber with branded sender profiles.

To ensure maximum deliverability, Dexatel supports automatic fallback to SMS if:

• The user does not have Viber installed

• The message fails to deliver

• The device is offline

This guarantees that critical messages, such as login codes or transaction confirmations, always reach the end user.

Analytics and Reporting

Understanding performance is essential for optimizing communication. Dexatel provides detailed analytics for Viber messages, including:

• Delivery rates

• Read rates

• Engagement metrics

• Campaign performance insights

With this data, businesses can measure effectiveness, improve timing, adjust targeting strategies, and maximize ROI.

How to Get Started With Viber API

Getting started with the Viber API is a straightforward process when working with an official messaging provider. The key steps include choosing the right partner, completing business verification, and preparing your launch setup.

Choosing a Viber API Provider

Viber Business API access is typically offered through authorized messaging providers. When selecting a provider, businesses should consider:

• Direct connectivity to Viber

• Omnichannel capabilities (SMS, WhatsApp, Telegram, etc.)

• OTP fallback options

• Analytics and reporting tools

• Technical support and onboarding assistance

• Transparent pricing

A reliable provider allows for smooth integration, faster approval, and stable message delivery.

Business Verification Timeline

Before sending messages, your business must complete Viber’s verification process.

This typically involves:

• Submitting company registration details

• Providing brand information and logo assets

• Defining your messaging use cases

• Setting up a branded sender profile

The approval timeline may vary depending on the industry and documentation, but verification usually takes several business days once all required information is submitted.

This step is essential to ensure trust, prevent spam, and maintain a secure messaging ecosystem.

Launch Checklist

Before going live with the Viber API, make sure you have:

• Completed Viber Business Account approval

• Integrated the API with your CRM, platform, or backend system

• Configured authentication credentials

• Tested message templates (transactional and promotional)

• Set up fallback routing (e.g., SMS) if needed

• Defined opt-in and compliance processes

• Configured tracking and analytics

Once these steps are complete, you’re ready to start sending messages at scale.

To Sum Up

The Viber API has become a high-engagement business messaging channel for companies operating in regions where Viber has strong user adoption.

It allows for secure, branded, and scalable communication across the entire customer journey—from transactional messages like OTPs and delivery updates to promotional campaigns and real-time customer support.

For businesses in eCommerce, fintech, retail, logistics, and customer service, the Viber API offers a direct and interactive way to connect with users inside a messaging app they already trust.

If you’re aiming to improve customer communication with reliable, scalable messaging, start using the Viber API with Dexatel and integrate it into your omnichannel strategy.