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Integrating your APP with Powering Voice and Streaming API

Add Voice and Streaming capability to your application with easy and proven APIs.

Powerful Features

Opentact gives you everything you ever needed to enable your application with Voice and Streaming.

Conference Calls

Media Streaming



Answering Machine Detection

Agent Coaching

Audio Playback

Call Recording

Smart IVR

Limitless capacities with Voice and Streaming API

Choose wisely with Opentact that can provide everything you need to text, call, connect with any one and any device.

  • Easy to use API
  • Everything on Cloud
  • Instant Plug and Play

Why Choose Opentact?

Opentact is uniquely positioned to provide best of the market voice and streaming capabilities.

Real Carrier

Opentact has its own carrier licenses, allowing us to directly access to the real telecom world.

Strong Development

Opentact is developed in-house by our dedicated development team.

Redundant Networks

Opentact has a global network architecture. Anyone can enjoy it anywhere in the world.

How to get started?

Developer Guides

We show you how to build a wide range of application using Opentact.

API Docs

You can easily get familiar with our API with our friendly developer doc.


We share sample codes in our GitHub.

Our Competitive Edge

What set us apart from our competitor is our strong technical team.

Global number coverage

Together with our own carrier licenses and close partnerships with Tier-1 carriers in over 140 countries worldwide.

Global reachability

We interconnect globally with local carriers to provide direct no-middleman telecommunication networks.

Real time API

The Opentact API allows users to receive events dynamically throughout different phases in a call session and enable real-time control of call handling.

99.999% uptime

We own our facilities and use Google and AWS as redundant multi-cloud infrastructure to ensure 99.999% uptime.

Direct pricing

Opentact owes our networks and therefore free our users from layers of mark-up by middleman companies.

Support you can count on

Our developers will personally answer your questions to help you out.