StealthChat vs Element (formerly Riot)

Messages can be set to self-destruct after a set time.

The app claims to be the only communication app that encrypts data in transit, on disk and on screen. Encryption in transit is used to make sure no-one can listen in on your conversations even if the traffic is going through their servers, encryption on disk is used to make sure that even if someone gets ahold of your phone and is capable of extracting your messages from it they won't be able to read them and screen encryption is essentially a lock screen that sets in after a set amount of time used to make prevent "shoulder surfing".

You're not confined within Element's or even Matrix garden, and you don't have to make users of other networks switch to Matrix.

Code snippets in chats can be highlighted with Markdown.

Element has a very simple interface, adding the ability for more inexperienced users to use it.

Element allows for fully encrypted text, voice, and video chatting.

Want to watch that flick at YouTube and discuss it at the same time? Have Grafana graphs stacked above your DevOps team chat? Collaboratively edit Google Docs and chat over without switching applications? This is possible with Element.

An open network for secure, decentralized communication.

Search messages in your current room, or all the rooms you're in. Not subject to a message history limit like Slack.

Web browser
Linux
OS X
Windows
Android
iOS

With public rooms for many people, and you can create your own and let people from the community join.

An easy to activate integration that allows multiple authors to edit a document simultaneously.