Cinny Matrix Client
Cinny is an open-source client for Matrix, available in the browser and as a desktop app. It focuses on a clean, simple interface for rooms, spaces and direct messages.
As a web client it can be hosted next to your own Matrix server, so a team can chat in a familiar interface while the data stays on infrastructure it controls.
Updates
We are evaluating Cinny as the web client for Matrix: internally for our own team chat, and for counselling platforms such as the one for TelefonSeelsorge.