API Text-to-Speech for communication transactional

SMS-to-Speech for companies

Converts text to voice calls are automated by using API. Sends codes, OTP, alerts, reminders and notifications to mobile phones and landlines in many countries.

OTP voiceAPI transactionalMobile and fixedDLR and webhook
Request processed
POST /voice
{
  "to": "+34XXXXXXXXX",
  "message": "Your code is 482 731",
  "language": "is-IS",
  "voice": "configured"
}
EventAPICall
🔐
OTP voiceAccess codes and verification.
Shipping via APIActivated by events of your system.
📞
Mobile and fixedThe recipient receives a call.
🌍
International coverageDestinations subject to operational validation.
🔔
DLR and webhookIntegrates results in your application.
What is SMS-to-Speech

The text of your application to a automated call

SMS-to-Speech, also known as SMS to Voice or Text-to-Speech, convert a message written on audio and play it back through a telephone call.

The call does not hold a conversation. Reproduces a content defined by your system: code is OTP, an alert, reminder, or any notification transactional adapted to the process.

SMS-to-Speech complements the written messages when a call is automated, it is more appropriate to the urgency, the recipient or the process.
Conversión de un mensaje de texto en una llamada de voz automatizada
Text generated by your system
Your access code is 4 8 2 7 3 1. We repeat: 4 8 2 7 3 1.
Spoken message
TTS
How it works

Four steps to convert a request API in a call

The implementation defines language, voice, pronunciation, and operational behavior.

⚙️

Your system generates the event

A login, a warning, a quote or any process created the message.

Sends the request to API

The application refers to the number and the text that should be reproduced.

🔊

The text is converted into speech

SMS.it applies the settings of language, voice and pronunciation.

📞

The recipient receives the call

The answer, listen to the message previously generated.

Use cases

Notifications of voice for transactional processes

The service is event-driven and automatic communications, not to call campaigns in bulk.

🔐

OTP voice

Delivery access codes, verification or authentication through an automated call.

Primary use case
🚨

Alerts operational

Communicates issues, technical alarms or urgent changes as a supplementary channel.

Not a substitute for emergency systems
📅

Reminders

Automates appointments, bookings, renewals, expirations, and errands to complete.

📦

Logistics

Reports on deliveries, pick-ups, incidents, and changes of state.

👥

Coordinating staff

Communicates shift changes, availability or operational instructions.

Communication inclusive

It offers an alternative spoken to users who face barriers to read SMS messages.

🏥

Health appointments

Sends reminders administrative avoiding confidential medical data unnecessary.

🏭

Industry and utilities

Reinforces maintenance alerts, anomalies and incidents techniques.

More attention to certain notices

When you read a message is not enough

An automated call may be more suitable for a code urgent, a landline phone, a recipient who prefer voice or a process which repeats the same type of notification.

Reinforces communications that require the most attention.
Automates notices that it is not efficient to perform manually.
Allows you to configure retries when the call is not answered.
Tailors language, voice, speed, and pronunciation during the implementation.
● Automated call

Verification code

“Your access code is four, eight, two, seven, three, one.”

API and integration

Integrates calls, Text-to-Speech in your software

Connect the SMS-to-Speech applications, CRM, ERP, platforms, authentication, systems logistics, dating software, or monitoring tools.

The service returns the DLR and can notify you results through the webhook to your application to continue the flow corresponding.

✓ Requests transactional
✓ DLR and webhook
✓ Retries configurable
✓ Small batches
✓ Lists, and CSV
✓ Worldwide coverage
Integración API para enviar OTP y notificaciones mediante llamadas Text-to-Speech
⚙️EventLogin, or appointment alert
APIText and target
📞CallSpoken message

The limit of content follows the logic of segmentation applicable to SMS messages.

Business benefits

Add voice to your notifications without creating a system conversational

Automates OTP and alerts

Active calls from events in your application without any manual intervention.

Complements the SMS

Use speech when the context or the recipient to make it more appropriate for a call.

Contact mobile and fixed

Expands the possibilities of contact via a phone call.

Customize the playback

Configures language, voice, speed, and pronunciation according to the implementation.

Integrates results

Used by DLR and webhook to continue the flows defined in your system.

Operates internationally

Values destinations and settings for your projects with coverage in several countries.

Choose the appropriate channel

SMS, SMS-to-Speech, Intelligent Voice or SMS certificate

Written message
💬

SMS

Your message brief and direct received in writing.

Suitable for: notices, campaigns and communications transactional.
See SMS bulk →
Conversation
🎙️

Intelligent Voice

Agent able to converse, to interpret responses and follow a flow.

Suitable for: attention, reservations and processes conversational.
See Intelligent Voice →
Documentary evidence
🔏

SMS certificate

Communication oriented to produce documentary evidence of the shipment.

Suitable for: communications that require traceability.
See SMS certificate →
Good practices

Design brief messages, clear and easy to listen to

01

Identifies the company

Explains from the start who makes the call.

02

Indicates the reason

Communicates with clarity what it is called.

03

Keep the message short

Prioritizes only the necessary information.

04

Test figures and names

Check pronunciation, pauses, and abbreviations.

05

Take care schedules

Prevents stripes inadequate for the recipient.

06

Prevents sensitive data

Don't play private information unnecessary.

07

Facilitates the next step

Indicates what the user should do after.

08

Respect the rules

Validates purpose, consent and conditions apply.

Tell us what process you want to convert in calls

We will analyze the volume, the destinations, the message type and the necessary integration.

Request information →
Frequently asked questions

Questions about SMS-to-Speech

The exact configuration is defined according to the country, the volume and the process.

What is SMS-to-Speech?

It is a service that turns text into audio and plays it through an automated phone call.

Does the recipient receive an SMS or a call?

You receive a call. The answer, listen to the message generated from the text sent by the API.

Can be used to OTP?

Yes. OTP voice is one of the major uses: allows you to communicate access codes or verification by phone call.

How you can call mobile phones and landlines?

Yes. The service you can make calls to mobile numbers and landlines.

How do you ship the calls?

Are activated by a request API from the application or enterprise system.

How you can choose the voice and language?

Yes. The language and voice are selected during the deployment. Can also be configured speed and pronunciation.

Do you support mass mailings?

The service is designed to communications that are transactional. You can work with small batches, lists, or CSV, but not to be seen as a tool of mass campaigns.

Do you have the DLR and webhook?

Yes. The integration can receive information from a result by DLR and webhook.

Can I configure retries?

Yes. The implementation can contemplate retries when the call is not answered.

Does it work on several countries?

Yes. The service has international coverage. The particular configuration is validated according to the destinations of the project.

Is it the same Intelligent Voice?

No. SMS-to-Speech plays a message previously defined. Intelligent voice has a conversation with and you can continue to flow more complex.

What is the limit of the message?

The content follows the same logic of length and segmentation applicable to SMS messages. It is advisable to keep the text brief for ease of listening.

Request a proposal

Request information about SMS-to-Speech

Tell us the volume, the destinations and the process that you want to automate. We will help you define the right settings.

Contact form

Convert your written notifications of calls that can be heard

Integrates OTP, alerts and reminders by voice into your business processes.