OTP fallback
Offer a voice fallback when SMS verification is delayed.
Voice Messages
Voice messaging for time-sensitive communication
Send automated voice messages for alerts, verification fallback and service notices—delivered to landlines and mobile phones.
Overview
What is voice messaging?
Voice messaging delivers a pre-recorded or text-to-speech call to a phone number. It is useful when SMS may be delayed, when customers prefer voice, or when accessibility matters.
Use voice messages for alerts, reminders and fallback flows—not as a substitute for consent-based communication.
Programs should respect quiet hours, do-not-call rules and local requirements.
TTSText-to-speech
RetryControlled retries
APISystem-triggered
Use Cases
Where voice messages fit
Reach customers when a voice call is the right channel.
Service alerts
Notify customers about outages, changes or urgent service updates.
Appointment reminders
Remind customers about scheduled visits or appointments.
Urgent notices
Deliver time-sensitive notices where local rules allow.
Features
Flexible message delivery
Text-to-speech
Generate spoken messages from text templates.
Recorded audio
Use pre-recorded messages where supported.
Retry and fallback
Apply controlled retries and channel fallback policies.
Delivery reporting
Track call outcomes and delivery events.
API triggers
Send messages from your application or service platform.
Multi-language
Match language and content to the target market.
How It Works
From trigger to delivery
Trigger a message
Your system sends a request with the target number and template.
Choose voice and content
Use text-to-speech or recorded audio for the market.
Deliver the call
Play the message and capture the call outcome.
Retry and report
Apply retry policies and review delivery reporting.
Compliance
Respect consent and calling rules
Voice messaging is subject to consent, do-not-call and time-of-day rules:
- Use consent-based contact lists and honor opt-outs.
- Respect quiet hours and local calling restrictions.
- Identify the caller and keep content accurate and relevant.
- Confirm requirements for the destination market before launch.
Requirements vary by country, carrier and use case. Confirm your voice program with your legal and compliance teams.
FAQ
Common questions about voice messaging
When should I use voice instead of SMS?
Use voice when SMS may be delayed, when the message is urgent, or when voice improves accessibility. Confirm the use case with local rules.
Can I use text-to-speech?
Yes, where supported. You can also use pre-recorded audio depending on the channel.
Which languages are available?
Language availability depends on the voice and market. Tell us your target languages and we will confirm options.
Can I retry a failed call?
Yes, with controlled retry policies to avoid nuisance calls.
Is a voice message the same as voicemail?
No. A voice message is an outbound call that plays a message; voicemail is a stored message on the recipient’s system.
Do I need consent?
Yes. Use consent-based contact lists and honor opt-outs and do-not-call rules.
Get Started
Plan a voice messaging flow
Tell us about your use case, target markets and expected volume. We will help you review numbers, templates and retry policies.