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Twilio Alternative

Thousands of developers rely on Sinch to provide a powerful and high-quality voice, messaging, and verification service for their apps. There are many providers that offer VoIP APIs, Mobile SDKs and SMS APIs, but Sinch is the Twilio alternative for app developers and businesses looking to add voice calling to their apps.


Add in-app voice calling to call numbers and apps across the world


Verify user phone numbers effectively with SMS PIN verification and Flash Call

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Send SMS from your iOS and Android app with our powerful SMS API

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Connect mobile and web users with our lightweight video SDK

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It's This Easy




id callClient = [sinchClient callClient];
[callClient callUserWithId:@"John"];
CallClient callClient = sinchClient.getCallClient()
Call call = callClient.callUser("John");
var callClient = sinchClient.getCallClient();
var call = callClient.callUser('John');

Sinch Features

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Server Integration

Integrate calling into your backend with our REST API so that you can maintain control of user verification, status updates

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All voice streams operated through Sinch are encrypted end-to-end

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OPUS Codec

Sinch uses the OPUS Codec, a robust, bandwidth adaptive, wideband and super-wideband voice codec for VoIP calling

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Push Notifications

Send Push Notifications directly from the SDK for seamless communication in the foreground and background

What our customers say

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We tested the market thoroughly, and we ultimately chose Sinch because of their high quality product, ability to scale, and excellent level of customer service.

Eric Setton, Co-Founder & CTO of Tango


Sinch has created a service that has been very helpful to our company. It’s easy to integrate, easy for our users, and provides great results.

Alan Mamedi, CEO & founder of Truecaller


Sinch was just simple to use. My developers have said that Sinch was easily integrated and was one of the easiest SDK’s they have ever worked with.

Philipp Mintchin, CEO & founder of SPLYT

What makes Sinch a Twilio Alternative?

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To give you the best calling quality, the Sinch platform will pick the best route for your calls and messages with the lowest latency.

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Low Cost

Our market leading prices make us a great Twilio alternative, with low costs that help you scale and grow.

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Get started quicker with the Sinch SDKs and APIs for iOS, Android, JavaScript, and REST APIs

The Sinch Difference


HD Quality

Use a Twilio alternative that offers high definition calling out of the box. Make app to phone or app to app calls over data or PSTN & get amazing HD quality across the world.

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The Sinch Voice API powers 1 million calls per day. With our own dedicated team of engineers and developers, we provide 99.95% uptime and 24/7 monitoring and maintenance

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Manage your calling and messaging features with your online account dashboard. Track usage, download billing reports and get your app keys and secrets at your convenience.

Learn More


Read more about how our platform works and how easy it is to get started


Learn more about what we offer and how our platform can enrich your app


View our market leading prices and get our low costs for your markets

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