Your code, your call.

Develop custom voice experiences with speed and agility.

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Finally, a Voice API that puts you in control from the ground up.

Now you can build high quality voice applications across PSTN and WebRTC with speed and flexibility, using your preferred programming language. Our API gets you to market faster with granular control and security plus real-time integration with AI bots and voice analysis systems.

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We need to use a Nexmo Call Control Object to greet the user when the call is answered.
    "action": "talk", 
    "text": "Hello from Nexmo!", 
    "voiceName": "Emma" 
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Businesses Using Nexmo

Achieve seamless integration, low latency, and global connectivity.


Easily integrate with third party vendors in real time, including artificial intelligence bots.

Nexmo Call Control Objects (NCCO)

Easily define your call control logic with our intuitively flexible JSON-based schema.

WebRTC Enabled

Calling over IP and PSTN with powerful programmable voice features to improve business outcomes and user experience.
See All Features

Get everything you need with Nexmo Developer.

Read the docs and explore our libraries.


Simple step-by-step instructions for specific use cases including:
Call TrackingSimple IVRVoice Based Critical AlertsPrivate Voice Communications

SDKs & Tools

Get up and running quickly in your language of choice.
View our API libraries on Github:
Plus get our command line tool.
Nexmo CLI


Provide feedback, gain, and share knowledge and find out where you can meet us in person via Slack, Stack Overflow, and Github.
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