Destination For Your Business Goal



Verify customers reliably and at ease using our OTP SMS Service

Send SMS OTPs with Sprint 2FA to your customers over dedicated high-priority channels to ensure the highest delivery rates at low latencies


Introduction - Transactional SMS

What is Transactional SMS

Transactional SMS is a type of SMS message that is sent to customers to provide them with critical information related to their transactions. Transactional SMS is sent to customers with whom the business has an existing relationship.

Characteristics of Transactional SMS

Transactional SMS is triggered by a specific event or action taken by the customer. It is time-sensitive and contains important information that the customer needs to know. Majorly it is personalized with customer-specific data, such as order numbers or account balances.

Examples of Transactional SMS

Order confirmation SMS sent by e-commerce platforms are Trans SMS. One-time password by banks or Flight booking confirmation SMS sent by airlines are also examples of transactional SMS. As a matter of fact delivery update SMS sent by logistics companies.


Why do you need Sprint's OTP & Transactional SMS Service?

With Sprint’s SMS OTP, you can improve verification metrics that help you achieve delivery rates as high as 97% at a latency of 2 seconds on average. You can track performance on the advanced SMS analytics dashboard which enables you to see if an OTP message has been delivered, failed, or ran into other delivery issues. Our OTP SMS is set apart from the competition as it can be used as a fallback mechanism to OTP, further cutting costs by up to 50%.


Reduce operational costs

Observe up to 50% savings with SMS OTPs when used as a fallback to OTP and by cutting out intermediate services to generate and validate OTPs.

Improve your verification metrics

Achieve delivery rates of 98% at a latency of 2-3 seconds on average with our dedicated high-priority OTP channels coupled with integrated backup routes and fallback networks.

Verify without the hassle

Get started in minutes with a self-serve dashboard and authenticate users with SMS OTP and cut out operational tasks like generating and validating OTPs.


Use Case

Transactional SMS is a powerful tool for businesses to send critical information related to customer transactions or interactions. Some common use cases for transactional SMS include order confirmations, delivery updates, and account balance notifications. For example, after a customer places an order on an e-commerce website, they may receive an SMS confirming the order and providing an estimated delivery date. As the order is being processed and shipped, customers can receive regular updates via SMS about the status of their delivery. Similarly, banks and financial institutions can send SMS notifications to customers about their account balance, recent transactions, or payment due dates. These use cases help to improve customer communication and enhance the overall customer experience.

Best practices for sending Transactional SMS

Opt-In Requirement

Businesses should ensure that customers have given explicit consent to receive transactional SMS messages. This can be achieved through opt-in mechanisms such as website forms,or SMS keywords.

Information Accuracy

Transactional SMS messages should be accurate and provide customers with relevant information related to their transactions. This helps to build trust and establish a positive customer experience.

Time Sensitivity

Transactional SMS messages should be sent in a timely manner, especially for critical information such as OTPs or order confirmations. Delayed or missed messages can lead to customer frustration and dissatisfaction.

Regulatory Compliance

Businesses should comply with local regulations related to transactional SMS messaging, such as restrictions on message content, sender ID, or frequency.


Personalization can help to increase the effectiveness of transactional SMS messages by making them more relevant and engaging for customers. This can include using customer-specific data such as name or order number in the message content.

Opt-Out Mechanisms

Businesses should provide customers with a clear and easy opt-out mechanism, such as an SMS keyword or unsubscribe link. This helps to respect customer preferences and avoid any potential regulatory violations.



Observe up to 50% savings with SMS OTPs when used as a fallback to OTP and by cutting out intermediate services to generate and validate OTPs.

Cleaner, faster APIs

Our highly programmable and clean REST APIs ensure smooth integrations with your existing systems

Sprintverify Analytics

SMS OTP dashboard for verification confirmations, to see if an OTP message has been delivered, failed, or has run into other delivery issues.

Numeric, alphabetical and alphanumeric OTPs

Generate and send strong and highly secure OTPs in either numeric, alphabetical or alphanumeric combinations.

Status call back

Receive status call backs for SMS OTPs sent and verification confirmations.

Fallback integrations

SMS OTP is a part of Sprint’s full-stack verification suite that includes OTP and Voice OTP acting as fallbacks to the SMS OTP ensuring successful deliveries.

Customer support options

Customer Support

When it comes to transactional SMS, it's important for businesses to have access to reliable customer support and contact information for their service provider. This ensures that any issues or questions related to messaging can be quickly resolved, minimizing any potential impact on customer experience.

Some Common Support Options

Some common customer support options for us include email -, and live chat. Email support is a popular option for us as it provides a paper trail of communication and allows for detailed explanations of any issues. Live Skype chat options is useful for businesses that require immediate assistance or have more complex issues that require real-time support.

Additional Support Information

In addition to customer support options, businesses should also have access to the phone numbers of their respective account managers in addition to their email address. This information should be easily accessible on the email signature of each Account Manager.

Frequently Asked Questions

What is the difference between transactional SMS and promotional SMS?

Transactional SMS is used to send critical and time-sensitive information related to customer transactions, while promotional SMS is used for marketing and promotional activities.

Is it possible to send promotional content through transactional SMS?

No, promotional content cannot be sent through transactional SMS as it is meant for sending only critical and informational content related to customer transactions.

Are there any regulations or compliance requirements for sending transactional SMS?

Yes, there are regulations and compliance requirements for sending transactional SMS, including the need for explicit consent from customers to receive messages and providing an opt-out option.

Can images or multimedia be included in transactional SMS? Is there a limit to the number of characters that can be included in a transactional SMS?

No, transactional SMS is limited to plain text and cannot include images or multimedia and transactional SMS is limited to 160 characters per message. However, longer messages can be split into multiple parts and sent as separate messages.