VoIP & Landline Calls

Free Audio and Video calls between Users over IP and low cost phone calls

Video Chat

7-Way Video Chat - The new way to communicate across all platforms

Chat & SMS

Send text messages to more than 400 global networks


All communication features are also available for group conversations

C2Call SDK for Communication on Mobile Apps and Web Browsers

Our SDK is available for mobile app developers free of charge. By integrating C2Call's technology into their mobile apps, developers can now have their users communicate across multiple apps, on multiple platforms. App users can then use video chat, rich media messaging, group audio and video calls and share location info with other users, all within one app!

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C2Calls SDKs

Create a developer account and download your favorite SDK for free.

We can offer a wide range of services

C2Call GmbH has been developing video chat, voice calling and messaging solutions for the computing cloud since 2008. As one of the pioneers in mobile communication over Internet Protocol, we can offer much more than other communication SDK’s.


A small selection of apps developed with the C2Call SDK




Years Experience



About us

C2Call GmbH leads the way in introducing next generation mobile and browser-based calling solutions for the computing cloud. FriendCaller for iOS and Android are built using C2Call SDK, and demonstrate the unique capabilities to establish a peer-to-peer connection with any mobile platform and with any Internet browser without prerequisite software installations. With the new C2Call SDK, developers would now be able to integrate features alike FriendCaller in their existing or new apps on mobile.