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.
callClient = [sinchClient callClient]; [callClient callUserWithId:@"John"];
CallClient callClient = sinchClient.getCallClient() Call call = callClient.callUser("John");
var callClient = sinchClient.getCallClient(); var call = callClient.callUser('John');
Integrate calling into your backend with our REST API so that you can maintain control of user verification, status updates
All voice streams operated through Sinch are encrypted end-to-end
Sinch uses the OPUS Codec, a robust, bandwidth adaptive, wideband and super-wideband voice codec for VoIP calling
Send Push Notifications directly from the SDK for seamless communication in the foreground and background
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
To give you the best calling quality, the Sinch platform will pick the best route for your calls and messages with the lowest latency.
Our market leading prices make us a great Twilio alternative, with low costs that help you scale and grow.
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.
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
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.