1. CONTUS MirrorFly – #1 Video Calling API Provider

Features and Functionality: 1. Peer-To-Peer Calling 2. Group Conferencing 3. Compatible across Multiple Devices 4. Multiple Device Compatibility

2. Agora – Online Video Calling Chat

Features and Functionality: 1. App-to-App Calling 2. Group Chat Video Calling 3. 360° Spatial Audio 4. Draw Whiteboard

3. Twilio – Web-Based Voice Chat

Features and Functionality: 1. Request a Phone Number 2. Send and Receive SMS 3. Audio and Video Conferencing 4. Call Monitoring and Call Routing

4. QuickBlox – App to App Calling

Features and Functionality: 1. Push Notifications 2. Audio Calling 3. Sophisticated Admin Panel 4. Secure Video Calling

5. Enablex – HD Video Calling Android

Features and Functionality: 1. Upfront, Completely One-Time Payment 2. Customizable UI With Tangible Layouts 3. Screen-Sharing & File Sharing