Make, receive and manage your calls globally with the voice API developers trust.
- Crystal clear callsWith 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 pausesUsing 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 limitsEmbed 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.
Answering Machine Detection
Speech to Text
“I have used other VoIP providers in the past, but have migrated all primary lines to Telnyx due to their outstanding reliability.”
All your business needs, in one API
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Cloud IVRBuild a scalable IVR to deliver a better customer experience and reduce operational costs.
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Contact CenterStart leveraging your communications layer with intelligent call flows and omnichannel analytics.
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Call TrackingExpand your customer base with global, compliant voice and text for omnichannel marketing analytics tools.
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AI & Voice AnalyticsBuild the conversations you've always wanted on a fully-featured global telephony network, all via API.
Our private global IP network was purpose-built for real-time communications, so your calls are crystal clear and secure, with low latency.
The internet wasn’t built for real-time communications, and it shows—with high latency, packet loss, and poor security.
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.
We use an edge-stack approach to route your data via the closest server to your application to deliver market-leading latency.
Greater reliance on the public internet and less control over core communications functionality significantly increases latency.
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.
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.
When cloud providers go down, we stay up. Our redundant multi-cloud architecture and automatic call recovery stop your calls from dropping.
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.
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).
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.
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.