Voice API

Voice with the power of programmability

Build a scalable voice experience with the Voice API that’s connecting millions around the world.

Illustration showing how a company can analyze and extract information from a customer phone call.

Recognition

Twilio named a Leader in CPaaS for second consecutive year

The Voice API that just works

Twilio Voice API capabilities

Customize your voice call experience

Build a voice experience that you can quickly scale and modify with a wide array of customization options and resources, like our Voice SDK. Unlock actionable insights from your conversations with Voice Intelligence and gain a deep understanding of every customer.  Then, add features like Interactive Voice Response (IVR), voice recording, and speech recognition to create an experience you and your customers will appreciate.

Connectivity you can trust to reach customers

Take advantage of the Voice API’s reliable, high quality connections supported by the Twilio Super Network. With access to global carriers, indefinite scaling, and private connections to the cloud, you’ll be able to start making quality VoIP calls in no time.

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Unlock ROI from your customer calls with Voice Intelligence

Turn voice interactions into actionable insights, enhance understanding of individual customers, and identify trends at scale. Voice Intelligence is your gateway to AI-powered business transformation. 

Voice intelligence turns voice calls into data

Trust and compliance with voice calling

 Increase your call answer rates by showing customers that you’re a trusted caller. Twilio makes it easy to get verified with Trust Hub.

Keep your customers safe and data secure

Emergency calling

Emergency calling that routes to local public safety answering points.

Secure media

Secure media to encrypt the call media and associated signaling remains private during transmission.

As a verified caller, you improve the reputation of your calls while helping fight unlawful robocalls and caller ID spoofing with:

Branded Calling - to display your name, logo, and call purpose on mobile

CNAM  - Caller ID names to display your business name

SHAKEN/STIR to combat Robocalls with “caller verified” signals

Voice Integrity to remediate and monitor phone number reputation

Use cases


Highly buildable solutions to get you connected

Alerts & notifications

Customize how you notify your customers to their preferences for notifications like password resets, low balance alerts, bill reminders, and fraud warnings.

Call tracking

Measure your business advertising ROI by accurately attributing call sources—be it campaign, search, social, keyword, or display ad—then, route leads to representatives.

Embedded calling

Use Voice SDK to quickly build scalable, WebRTC-powered voice applications with uniform performance across all browsers and devices.

Global conferencing

Add multi-party calling experiences, global dial-in support, and support for up to 250 participants with included PCI and HIPAA compliance for your customers’ privacy.

Masked calling

Communicate seamlessly and protect the sensitive data of both you, and your customers, with the Voice API’s temporary phone number proxies.

Interactive Voice Response (IVR)

Increase customer engagement and reduce operation costs with a scalable IVR system that can respond to commands, build text-to-speech experiences in hundreds of languages, and more.

Need help building? No problem.

Work with one of our trusted partners to get coding support or explore a pre-built voice solution.

Work with Twilio Professional Services to set up global call tracking for your company

“We got lucky that we were able to identify a great partner in Twilio, and we were able to move exceptionally fast.”

Santiago Garces CIO, City of Pittsburgh

Pricing that reflects your business needs

Build the engaging call experience you’ve always wanted without worrying about the price. Only pay for what you use, no commitments necessary.

Frequently asked questions about Twilio Voice API

Conversations that start from a Facebook or Instagram ad that clicks to WhatsApp or Facebook Page CTAS are free for three days after the conversation begins. Free entry point conversations are user-initiated and only the first conversation is free of charge. Conversations with consumers after that are still charged. Twilio per message fees still apply.

Standard pricing will apply for the Facebook and Instagram ads that click to WhatsApp. The conversation that initiates from the ad is free, but not the ad itself.

The 24-hour conversation window starts when businesses send their first message to the user. Each conversation type has a separate 24-hour conversation window and will incure a separate charge.

When you submit a WhatsApp template for approval through the Twilio Console, you will be prompted to select one of the categories. You will be able to let WhatsApp override the category and approve the template, or let WhatsApp reject the template if the category selection does not match WhatsApp’s classification. Twilio's system will show you whether your selection was accepted or rejected, as well as the final category determined by WhatsApp. Additionally, all templates that were created before the new category-based pricing model took effect on June 1, 2023 have been automatically reclassified by Meta's machine learning classifier.

Conversations that start from a Facebook or Instagram ad that clicks to WhatsApp or Facebook Page CTAS are free for three days after the conversation begins. Free entry point conversations are user-initiated and only the first conversation is free of charge. Conversations with consumers after that are still charged. Twilio per message fees still apply.

Standard pricing will apply for the Facebook and Instagram ads that click to WhatsApp. The conversation that initiates from the ad is free, but not the ad itself.

The 24-hour conversation window starts when businesses send their first message to the user. Each conversation type has a separate 24-hour conversation window and will incure a separate charge.

When you submit a WhatsApp template for approval through the Twilio Console, you will be prompted to select one of the categories. You will be able to let WhatsApp override the category and approve the template, or let WhatsApp reject the template if the category selection does not match WhatsApp’s classification. Twilio's system will show you whether your selection was accepted or rejected, as well as the final category determined by WhatsApp. Additionally, all templates that were created before the new category-based pricing model took effect on June 1, 2023 have been automatically reclassified by Meta's machine learning classifier.