YakYak

vs

Linphone

Element is an All-in-one secure chat app for teams, friends and organisations that allow you to own your conversations. With Element you can keep conversations in your control, safe from data-mining and ads. Element utilize the open and global Matrix network for message relay, protected by proven end-to-end encryption.

Signal is a cross-platform encrypted messaging application that has a strong focus on privacy. The application is developed by Signal Messenger LLC and provides users with features like one-to-one and group messages, which can include files, voice notes, images and videos. The software is famous for being used by the whistleblower and privacy advocate Edward Snowden who once said "I use Signal every day, it is the most scalable encryption tool we have".

Jami is a free, open-source. universal distributed communication platform which preserves the user's privacy and freedoms. Jami supports a variety of video input options, including mutliple cameras and image and video files, and the selection of audio inputs and outputs with high quality audio and video codecs.