Programmable Voice

Voice API

Make, receive and manage your calls globally with the voice API developers trust. Build the exact experience you want with more control than any alternative.
Voice API

Build the next generation of applications on the next-gen cloud platform

  • Crystal clear calls

    With Tier-1 interconnects at major global internet hubs, your calls get through the first time, every time. High-speed connections mean reduced latency and jitter as calls avoid the public internet.

  • Goodbye long awkward pauses

    Using an edge-stack approach, we leverage multiple global points of presence to process data in the location nearest your application—for consistently low latency levels.

  • Calling without limits

    Embed PSTN, SIP, or VoIP calling into any phone, browser, SIP domain or mobile application. Get instant local, national and toll-free numbers, and scale on demand with unlimited capacity.


Powerful features out of the box.

Conference Calls

Connect people and teams across the globe with feature-rich audio conferencing.

Media Streaming

Access the raw audio stream of calls to integrate advanced AI/ML capabilities.


Speak dynamic text in 29 languages and accents, powered by Amazon Polly.

Answering Machine Detection

Premium AMD uses advanced speech recognition technology for exceptional accuracy.

Agent Coaching

Speak privately on a call to provide feedback and guidance to an agent.

Speech to Text

Real-time transcription on a live call, activated via one API command.

Call Recording

Integrate dual-channel recordings to capture all or part of calls.

Smart IVR

Build a multi-level IVR to intelligently route your call flows.
FEB 03, 2021
“I have used other VoIP providers in the past, but have migrated all primary lines to Telnyx due to their outstanding reliability.”
Tim H
Senior Consultant

Build exactly what you need for your use-case.

Choose a use case:
  • Conference Calls
  • Call Tracking
  • Cloud IVR
  • Contact Center
  • Sales Acceleration
  • AI & Voice Analytics

Conference Calls

Embed feature-rich call conferencing into your application to connect global teams and enable work from home at scale.



Private network

Our private global IP network was purpose-built for real-time communications, so your calls are crystal clear and secure, with low latency.

Public internet

The internet wasn’t built for real-time communications, and it shows—with high latency, packet loss, and poor security.

Fully owned

We control our infrastructure, so we control routing, quality and traffic for high-quality calls and low post-dial delay.


Using other providers’ servers and middlemen for routing and telephony leads to persistent routing and quality issues.

Sub-second response time

We use an edge-stack approach to route your data via the closest server to your application to deliver market-leading latency.

3+ second response times

Greater reliance on the public internet and less control over core communications functionality significantly increases latency.

  • See our Voice API Pricing

    Customers typically save 30% by switching to Telnyx, with lower list pricing and automatic volume discounts.

    Starting at $0.002/min to make or receive a call.

    See Pricing

A better voice experience is calling.

  • Deep number coverage

    Thanks to our licensed carrier status in 25+ countries worldwide and close partnerships with Tier-1 carriers in over 140 countries worldwide.

  • Global scalability

    Our network combines global points of presence and deep interconnects with local carriers for worry-free, compliant global communications.

  • Real time control

    The Telnyx API allows users to receive commands dynamically throughout the call for granular-level, interactive command and control.

  • Direct pricing

    Telnyx maintains complete control over our network, so we’re able to cut out the middlemen our competitors depend on—avoiding costly markups.

  • Support you can count on

    Our best-in-class 24/7 NOC support is available by phone and email for every single customer with no minimum spend requirements.

Ready to get started?

Questions on setup? Talk to our experts

Frequently Asked Questions

A voice API is a tool that software developers use to make and receive phone calls using an Application Programming Interface (API). A voice API connects internet-based applications to the Public Switched Telephone Network (PSTN).

To get started, sign up for a Portal account, then follow the 4 remaining steps in our quickstart guide to create an application, buy a number, assign it to your app and create an outbound voice profile. Then, use our SDKs to start building.

Yes, you can use the Telnyx voice API to record calls using the record_start command. You’ll find code snippets to help you do this quickly and easily in our developer center.

Absolutely. Text-to-speech allows you to convert text to speech and play it back on the call. We leverage Amazon Polly to provide a conversational experience, available across 29 languages and accents. You can find out how to use the speak_text command in our developer center.

You can find pricing for Call Control on our pricing page. Telnyx offers even greater discounts as you scale, or when you’re ready to commit to monthly usage—talk to our sales team about custom pricing.

You can! We’ve developed a tool called TeXML Translator to make it easy for you to use your XML based applications with the Telnyx voice API. Follow the TeXML setup guide in our developer center to get started.

You can build a range of different applications using the Telnyx voice API—these include call tracking, cloud IVR, contact center and conference calling, to name a few.

While phone calls made using a voice API can be powered over the internet, they also rely on a VoIP network to be completed. WebRTC calls are solely focused on browser-based communication. Learn more about Telnyx’s WebRTC solution.