Device Type: desktop
Skip to Main Content Skip to Main Content

Voice-based critical alerts

Enable worldwide delivery of critical alerts via phone calls and grow your business with viral adoption.
Try it free
Stylized illustration of mobile phone screen with pop up and ringing bell.

More immediate reach

A persistently ringing phone is harder to ignore than a text or push message, so using a voice call to deliver a critical alert — about a cancelled flight or an early school closing — increases the likelihood of your alert being heard.

Guarantee delivery

To guarantee critical alerts are delivered, you can use a simple IVR application to enable call recipients to acknowledge receipt of the alert. In addition, you can deliver alerts automatically to backup contacts if no acknowledgement is detected.

How voice-based critical alerts works

Pictogram of a handset with noise coming out

1. Your app calls

Your application initiates simultaneous calls to everyone who needs to know about an event that has happened or is about to happen.
Number sign

2. Call recipients answer

Call recipients see the local virtual number you provisioned from Vonage API as the caller ID and answer the phone.
Pictogram of sound waves indicating voice.

3. Alert recipient hears your message

Your app plays a recorded or text-to-speech message to convey the alert. Your message can be personalised and delivered in multiple languages.
Exclamation point caution pictogram

4. Alert recipient confirms receipt

Your app instructs the called party to press a key to acknowledge receipt of your message.
Image of graphs

5. You can run reports

You can run reports to see who was contacted (and when) as well as who responded (and when) to your alert.

Programmable elements used in this solution

Why choose Vonage APIs for voice-based critical alerts?

Engage locally to reach recipients

Using Vonage's Number Provisioning API, you can associate local phone numbers with your campaigns. Vonage APIs provide only high-quality voice connections that pass calling line identification (CLI) information, so you can present users with a recognisable local identity, which increases the likelihood that calls will be answered. You can also deliver text-to-speech messages in the local language for each market, with 23 languages supported.

Reduce costs

With true per-second billing in most countries, you pay only for the time you use. Compared to traditional per-minute billing you could save more than 50%, depending on your calling patterns and destinations. In addition, you save long distance fees because all calls are local in their respective markets.

Make sure alerts are confirmed

Using Voice API, you can ask recipients to confirm alert receipt with a simple IVR menu. In the case of emergency alerts, recipients could indicate whether or not they are safe via the same IVR menu. You could also enable them to record an audio response.

Real time interaction

Because Vonage APIs can interact with your application in real time, you can optimise your business rules to respond in a dynamic manner. For example, when Vonage APIs detect that voicemail or an answering machine has answered the call, it informs your app in real time so that your business rules can determine whether to retry or leave a message.

Related solutions

Private SMS Communication Connect your users via text message privately.
Call Tracking Track call metadata for lead generation and marketing campaigns.
Passwordless Authentication Replace static passwords with single-use codes sent over SMS, voice or push.

Try it free

Start developing now with free credit. No credit card required.
Screen grab of the API Developer Center showing code that can be copied for use.
Deskphone with Vonage logo

Talk to an expert.