Voice Calling
Make personal connections with voice calling
Reach out globally and enhance user experience with voice conversations in your customers’ own language.
Join over 150,000 businesses, including 8 of the 10 largest tech companies in the world.
Create new engagement and connections with voice calling
Experience exceptional voice quality
Achieve reliable reach
Discover ultimate scalability
Global reach and local presence
Build conversations where they matter
Implement voice calling, sit back, and enjoy higher engagement, efficiency, and flexibility – and reduced costs!
Keep it simple and scale faster with a complete solution powered by a global carrier network for high-quality voice calling and guaranteed call delivery.
“We tested the market thoroughly and we chose Sinch because of their high-quality product, ability to scale, and excellent level of customer service. From purchase to implementation to performance, we found the right partner in Sinch.”
Top-notch quality and cross-platform support
Our programmable Voice API reaches customers on any platform or channel! Integrate PSTN, SIP, and VoIP calling to manage calls on apps, web browsers, mobile phones, or landlines.
Enjoy a high-quality voice experience, optimized delivery routes, and carrier super network – all in one place.
{
"method": "ttsCallout",
"ttsCallout": {
"cli": "+14045001000",
"destination": {
"type": "number",
"endpoint": "+14045005000"
},
"locale": "en-US",
"text": "Hello, this is a call from Sinch."
}
}
Build the call experience you need
Not a developer? No problem! Use our web portal to make your first call in just a few simple steps – no coding required.
Get started in a snap with our user-friendly, scalable Voice API:
Create an account – no credit card needed.
Get your app key and secret.
Trigger a text-to-speech voice callout.
Wait for the customer to answer the call.
Done!
Build a custom voice flow for your business with our Voice API
Numbers
Call recording
Recorded prompts
Interactive Voice Response (IVR) menus
Answering machine detection
Voice-based IVR
Conference calling
Text-to-speech
Pay as you go
Local presence
Got questions? We’ve got answers!
Phone calling is a traditional telephone call – both the caller and the person being called are using a phone line via a mobile device or landline. In-app voice calling is a software-based call with audio and/or video information sent over the internet between the caller and the recipient.
Once integrated into your app, users can make calls from their computers or mobile devices.
It’s simple! First, create an account on the Sinch portal. Then, create a voice application, and you’ll receive a set of credentials (key and secret). With these credentials, you can use our REST APIs to trigger and receive calls, bind multiple calls into a conference, manage your call flow via our callback API, and more. You can also rent and manage phone numbers.
You can easily find numbers from a wide range of countries in the portal – just sign in! Some countries require a local presence and additional company information before we can source you a number. If you’re interested or have any questions, talk to us.
Users usually integrate our Voice Calling via our calling and callback REST APIs. At the moment, we offer a C# backend SDK available as a NuGet. New SDKs will be available in the future.
Absolutely! Apart from SMS and MMS, 10DLC also supports voice calls. And of course, with our super network, carrier-grade platform, and deep technology knowledge, you’re sure to get a top-notch, cost-effective voice solution!
Related products
In-App Video Calling
In-App Voice Calling
Number Masking
Phone Call Verification
STIR/SHAKEN
Number Porting
What are you waiting for?
Set up customer interactions now!