User:Mikk676/sandbox

Upontalk
Developer(s)	Upontalk, Inc.
Initial release	3 December 2017; 7 years ago
Operating system	Android; iOS; Linux; macOS; Windows
Platform	Android 4.2 or later; iOS 8.0 or later; Linux; macOS 10.9 or later; Windows 7 or later; Upontalk for Web: Internet Explorer 11 or later, Firefox 31 or later, Chrome 26 or later, Safari 7 or later, Opera 27 or later;
Type	Communication software
Website	Official website

Upontalk is a cross-platform, encrypted instant messaging client created by Upontalk, Inc. It is available for iOS, Android, Linux, Windows, macOS and Web browser clients. It uses the Internet to make voice and video calls; send text messages, files, images, videos, audio files and user drawings depending on the clients used. It can be used on any of the available clients, requiring a phone number or email for registration. It is hosted inside the European Union and protected by European Union laws.

Features

Upontalk allows users to exchange text, voice, photo, video and music messages. The application also supports group messaging.

The app allows group calling with up to ten participants. A stereo feature places participants in "virtual space" so that users can differentiate voice directionality. The application adapts to varying network conditions.

The application supports the exchange of animated GIFs up to 5MB through a media integration with a company called Giphy. The iOS and Android versions also include a sketch feature that allows users to draw a sketch into a conversation or over a photo. YouTube, Soundcloud, Spotify and Vimeo integrations allow users to share music and videos within chats.

Upontalk is available on mobile, desktop and web. The web service is called Upontalk for Web. Upontalk activity is synced on iOS, Android and web apps. Upontalk also includes a function for ephemeral messaging in 1:1 and group conversations. With Upontalk for Teams, Upontalk introduced a paid product with a series of features available to businesses. It offers the administration of team members: Adding and removing people, assigning roles, and inviting guests to specific chats.

Technical

Upontalk provides end-to-end encryption for its instant messages. Upontalk's instant messages are encrypted with Proteus, a protocol that Upontalk, Inc. developed based on the Signal Protocol. Upontalk's voice calls are encrypted with DTLS and SRTP, and its video calls with RTP. In addition to this, client-server communication is protected by Transport Layer Security.