The World's Most Advanced Voice + SMS API

Build your application with SMS messages using Zang


Send and receive text messages. Get creative with SMS to send notifications to users or leverage group messaging.

Zang lets you send and receive phone calls

Phone Calls

Make calls to any phone number in the world. Use your real phone number or set a custom Caller ID.

Buy bulk phone numbers with Zang

Buy Numbers

Buy a US number or international numbers from an ever growing list of our supported countries!

Add voice capabilities to your web or mobile app with Zang

Add Voice to Apps

Plug voice capabilities into your apps with our APIs. The features run the gamut from call tracking with lead generation function to Interactive Voice Response to detect and respond to voice commands.

  • Record your calls with Zang

    Record Calls

    Record any outgoing call and save for future listening or sharing on social media!

  • Zang produces phone call transcriptions

    Call Transcriptions

    The ability to transcribe calls during or even after a call happens.

  • Zang lets you change your voice in phone calls

    Voice Changer

    Allow users to change their voice – filter to man, woman or even a robot voice – for their calls.

  • Add background audio noise to your phone calls

    Background Audio

    Add in traffic noise, ambient effects or any background audio to calls.

  • Use InboundXML to control inbound call flow


    Enjoy ultimate flexibility with Zang. Use a simple XML dialect to control inbound call flow.